diff --git a/amethyst/src/androidTest/java/com/vitorpamplona/amethyst/ThreadDualAxisChartAssemblerTest.kt b/amethyst/src/androidTest/java/com/vitorpamplona/amethyst/ThreadDualAxisChartAssemblerTest.kt
index 39b9db024d..d799adb156 100644
--- a/amethyst/src/androidTest/java/com/vitorpamplona/amethyst/ThreadDualAxisChartAssemblerTest.kt
+++ b/amethyst/src/androidTest/java/com/vitorpamplona/amethyst/ThreadDualAxisChartAssemblerTest.kt
@@ -21,7 +21,6 @@
 package com.vitorpamplona.amethyst
 
 import androidx.test.ext.junit.runners.AndroidJUnit4
-import com.fasterxml.jackson.module.kotlin.readValue
 import com.vitorpamplona.amethyst.commons.relayClient.assemblers.CashuMintDirectoryFilterAssembler
 import com.vitorpamplona.amethyst.commons.relayClient.nip47WalletConnect.NWCPaymentFilterAssembler
 import com.vitorpamplona.amethyst.commons.viewmodels.thread.ThreadFeedFilter
@@ -34,6 +33,7 @@ import com.vitorpamplona.quartz.nip01Core.core.Event
 import com.vitorpamplona.quartz.nip01Core.crypto.KeyPair
 import com.vitorpamplona.quartz.nip01Core.crypto.verify
 import com.vitorpamplona.quartz.nip01Core.jackson.JacksonMapper
+import com.vitorpamplona.quartz.nip01Core.jackson.jacksonTypeRefOf
 import com.vitorpamplona.quartz.nip01Core.relay.client.NostrClient
 import com.vitorpamplona.quartz.nip01Core.signers.NostrSignerInternal
 import com.vitorpamplona.quartz.nip01Core.tags.aTag.ATag
@@ -163,7 +163,7 @@ class ThreadDualAxisChartAssemblerTest {
     fun threadOrderTest() =
         runBlocking {
             val eventArray =
-                JacksonMapper.mapper.readValue<List<Event>>(db) + Event.fromJson(header)
+                JacksonMapper.mapper.readValue(db, jacksonTypeRefOf<List<Event>>()) + Event.fromJson(header)
 
             var counter = 0
             eventArray.forEach {
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/service/lnurl/LightningAddressResolver.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/service/lnurl/LightningAddressResolver.kt
index 2ed7dce908..305cb433a2 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/service/lnurl/LightningAddressResolver.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/service/lnurl/LightningAddressResolver.kt
@@ -21,7 +21,7 @@
 package com.vitorpamplona.amethyst.service.lnurl
 
 import android.content.Context
-import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import com.fasterxml.jackson.databind.ObjectMapper
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.service.HttpStatusMessages
 import com.vitorpamplona.amethyst.ui.stringRes
@@ -167,7 +167,7 @@ class LightningAddressResolver {
 
         val errorMessage =
             runCatching {
-                jacksonObjectMapper().readTree(body)
+                ObjectMapper().readTree(body)
             }.getOrNull()?.let { tree ->
                 val errorNode = tree.get("error")
                 val messageNode = tree.get("message")
@@ -218,7 +218,7 @@ class LightningAddressResolver {
         context: Context,
         onZapRequestSent: (LnZapRequestEvent?) -> Unit = {},
     ): String {
-        val mapper = jacksonObjectMapper()
+        val mapper = ObjectMapper()
 
         val lnurlpUrl = assembleUrl(lnAddress)
 
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/service/uploads/nip96/Nip96Uploader.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/service/uploads/nip96/Nip96Uploader.kt
index c52095af2a..da9f6875ca 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/service/uploads/nip96/Nip96Uploader.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/service/uploads/nip96/Nip96Uploader.kt
@@ -26,7 +26,7 @@ import android.net.Uri
 import android.provider.OpenableColumns
 import android.webkit.MimeTypeMap
 import androidx.core.net.toFile
-import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import com.fasterxml.jackson.databind.ObjectMapper
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.service.HttpStatusMessages
 import com.vitorpamplona.amethyst.service.checkNotInMainThread
@@ -209,7 +209,7 @@ class Nip96Uploader {
 
                     val errorMessage =
                         try {
-                            val tree = jacksonObjectMapper().readTree(msg)
+                            val tree = ObjectMapper().readTree(msg)
                             val status = tree.get("status")?.asText()
                             val message = tree.get("message")?.asText()
                             if (status == "error" && message != null) {
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/tor/ArtiGuardState.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/tor/ArtiGuardState.kt
index 5ceab6f135..67ca1ed0b9 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/tor/ArtiGuardState.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/tor/ArtiGuardState.kt
@@ -21,7 +21,7 @@
 package com.vitorpamplona.amethyst.ui.tor
 
 import com.fasterxml.jackson.databind.JsonNode
-import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import com.fasterxml.jackson.databind.ObjectMapper
 
 /**
  * Pure, file- and JNI-free parsers over Arti's persisted guard sample
@@ -42,7 +42,7 @@ import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
  *   circuit — i.e. a real bootstrap reached the guard-confirmation stage.
  */
 object ArtiGuardState {
-    private val mapper = jacksonObjectMapper()
+    private val mapper = ObjectMapper()
 
     /** Convenience for tests/callers holding the raw file text. */
     fun parse(json: String): JsonNode = mapper.readTree(json)
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/tor/TorService.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/tor/TorService.kt
index e8566a2275..5384e3f808 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/tor/TorService.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/ui/tor/TorService.kt
@@ -22,7 +22,7 @@ package com.vitorpamplona.amethyst.ui.tor
 
 import android.content.Context
 import com.fasterxml.jackson.databind.JsonNode
-import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import com.fasterxml.jackson.databind.ObjectMapper
 import com.vitorpamplona.quartz.utils.Log
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
@@ -206,7 +206,7 @@ class TorService(
         val file = guardsFile()
         if (!file.exists()) return null
         return try {
-            jacksonObjectMapper().readTree(file)
+            ObjectMapper().readTree(file)
         } catch (e: Exception) {
             Log.w("TorService") { "Could not inspect guards.json: ${e.message}" }
             null
diff --git a/benchmark/src/androidTest/java/com/vitorpamplona/quartz/benchmark/BaseLargeCacheBenchmark.kt b/benchmark/src/androidTest/java/com/vitorpamplona/quartz/benchmark/BaseLargeCacheBenchmark.kt
index 1da2be3a7e..cbd06b89d1 100644
--- a/benchmark/src/androidTest/java/com/vitorpamplona/quartz/benchmark/BaseLargeCacheBenchmark.kt
+++ b/benchmark/src/androidTest/java/com/vitorpamplona/quartz/benchmark/BaseLargeCacheBenchmark.kt
@@ -20,10 +20,10 @@
  */
 package com.vitorpamplona.quartz.benchmark
 
-import com.fasterxml.jackson.module.kotlin.readValue
 import com.vitorpamplona.quartz.nip01Core.core.Event
 import com.vitorpamplona.quartz.nip01Core.core.HexKey
 import com.vitorpamplona.quartz.nip01Core.jackson.JacksonMapper
+import com.vitorpamplona.quartz.nip01Core.jackson.jacksonTypeRefOf
 import com.vitorpamplona.quartz.utils.cache.LargeCache
 import org.junit.Assert.assertTrue
 import java.util.function.Consumer
@@ -35,8 +35,9 @@ open class BaseLargeCacheBenchmark {
             // This file includes duplicates
             val fullDBInputStream = javaClass.classLoader!!.getResourceAsStream("nostr_vitor_startup_data.json.gz")
 
-            return JacksonMapper.mapper.readValue<ArrayList<Event>>(
+            return JacksonMapper.mapper.readValue(
                 GZIPInputStream(fullDBInputStream),
+                jacksonTypeRefOf<ArrayList<Event>>(),
             )
         }
     }
diff --git a/benchmark/src/androidTest/java/com/vitorpamplona/quartz/benchmark/CacheBenchmark.kt b/benchmark/src/androidTest/java/com/vitorpamplona/quartz/benchmark/CacheBenchmark.kt
index d9138f5dce..dbec80137d 100644
--- a/benchmark/src/androidTest/java/com/vitorpamplona/quartz/benchmark/CacheBenchmark.kt
+++ b/benchmark/src/androidTest/java/com/vitorpamplona/quartz/benchmark/CacheBenchmark.kt
@@ -23,10 +23,10 @@ package com.vitorpamplona.quartz.benchmark
 import androidx.benchmark.junit4.BenchmarkRule
 import androidx.benchmark.junit4.measureRepeated
 import androidx.test.ext.junit.runners.AndroidJUnit4
-import com.fasterxml.jackson.module.kotlin.readValue
 import com.vitorpamplona.quartz.nip01Core.core.Event
 import com.vitorpamplona.quartz.nip01Core.core.HexKey
 import com.vitorpamplona.quartz.nip01Core.jackson.JacksonMapper
+import com.vitorpamplona.quartz.nip01Core.jackson.jacksonTypeRefOf
 import com.vitorpamplona.quartz.utils.cache.LargeCache
 import org.junit.Assert.assertTrue
 import org.junit.Rule
@@ -43,8 +43,9 @@ open class BaseCacheBenchmark {
         // This file includes duplicates
         val fullDBInputStream = javaClass.classLoader?.getResourceAsStream("nostr_vitor_startup_data.json.gz")
 
-        return JacksonMapper.mapper.readValue<ArrayList<Event>>(
+        return JacksonMapper.mapper.readValue(
             GZIPInputStream(fullDBInputStream),
+            jacksonTypeRefOf<ArrayList<Event>>(),
         )
     }
 
diff --git a/benchmark/src/androidTest/java/com/vitorpamplona/quartz/benchmark/EventCmdSerializerBenchmark.kt b/benchmark/src/androidTest/java/com/vitorpamplona/quartz/benchmark/EventCmdSerializerBenchmark.kt
index 1eec88137d..884e353321 100644
--- a/benchmark/src/androidTest/java/com/vitorpamplona/quartz/benchmark/EventCmdSerializerBenchmark.kt
+++ b/benchmark/src/androidTest/java/com/vitorpamplona/quartz/benchmark/EventCmdSerializerBenchmark.kt
@@ -23,7 +23,7 @@ package com.vitorpamplona.quartz.benchmark
 import androidx.benchmark.junit4.BenchmarkRule
 import androidx.benchmark.junit4.measureRepeated
 import androidx.test.ext.junit.runners.AndroidJUnit4
-import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import com.fasterxml.jackson.databind.ObjectMapper
 import com.vitorpamplona.quartz.nip01Core.core.Event
 import com.vitorpamplona.quartz.utils.sha256.Sha256Hasher
 import org.junit.Rule
@@ -54,7 +54,7 @@ class EventCmdSerializerBenchmark {
 
     @Test
     fun jsonStringEncoderJackson() {
-        val jsonMapper = jacksonObjectMapper()
+        val jsonMapper = ObjectMapper()
         benchmarkRule.measureRepeated {
             jsonMapper.writeValueAsString(specialEncoders)
         }
@@ -62,7 +62,7 @@ class EventCmdSerializerBenchmark {
 
     @Test
     fun jsonStringEncoderSha256Jackson() {
-        val jsonMapper = jacksonObjectMapper()
+        val jsonMapper = ObjectMapper()
         benchmarkRule.measureRepeated {
             val digest = Sha256Hasher()
             digest.hash(jsonMapper.writeValueAsString(specialEncoders).toByteArray())
diff --git a/commons/src/jvmAndroid/kotlin/com/vitorpamplona/amethyst/commons/service/lnurl/LightningAddressResolver.kt b/commons/src/jvmAndroid/kotlin/com/vitorpamplona/amethyst/commons/service/lnurl/LightningAddressResolver.kt
index 9161df6764..5acca96399 100644
--- a/commons/src/jvmAndroid/kotlin/com/vitorpamplona/amethyst/commons/service/lnurl/LightningAddressResolver.kt
+++ b/commons/src/jvmAndroid/kotlin/com/vitorpamplona/amethyst/commons/service/lnurl/LightningAddressResolver.kt
@@ -20,7 +20,7 @@
  */
 package com.vitorpamplona.amethyst.commons.service.lnurl
 
-import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import com.fasterxml.jackson.databind.ObjectMapper
 import com.vitorpamplona.quartz.lightning.LnInvoiceUtil
 import com.vitorpamplona.quartz.lightning.Lud06
 import com.vitorpamplona.quartz.nip57Zaps.LnZapRequestEvent
@@ -48,7 +48,7 @@ import kotlin.coroutines.cancellation.CancellationException
 class LightningAddressResolver(
     private val httpClient: OkHttpClient,
 ) {
-    private val mapper = jacksonObjectMapper()
+    private val mapper = ObjectMapper()
 
     /**
      * Result of resolving a lightning address to a BOLT11 invoice.
diff --git a/commons/src/jvmAndroid/kotlin/com/vitorpamplona/amethyst/commons/service/lnurl/OkHttpLnurlEndpointResolver.kt b/commons/src/jvmAndroid/kotlin/com/vitorpamplona/amethyst/commons/service/lnurl/OkHttpLnurlEndpointResolver.kt
index 2fbdf41481..dd162f881c 100644
--- a/commons/src/jvmAndroid/kotlin/com/vitorpamplona/amethyst/commons/service/lnurl/OkHttpLnurlEndpointResolver.kt
+++ b/commons/src/jvmAndroid/kotlin/com/vitorpamplona/amethyst/commons/service/lnurl/OkHttpLnurlEndpointResolver.kt
@@ -20,7 +20,7 @@
  */
 package com.vitorpamplona.amethyst.commons.service.lnurl
 
-import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import com.fasterxml.jackson.databind.ObjectMapper
 import com.vitorpamplona.quartz.nip57Zaps.validate.LnurlEndpointCache
 import com.vitorpamplona.quartz.nip57Zaps.validate.LnurlEndpointInfo
 import com.vitorpamplona.quartz.nip57Zaps.validate.LnurlEndpointResolver
@@ -47,7 +47,7 @@ import kotlin.coroutines.cancellation.CancellationException
 class OkHttpLnurlEndpointResolver(
     private val okHttpClient: (String) -> OkHttpClient,
 ) : LnurlEndpointResolver {
-    private val mapper = jacksonObjectMapper()
+    private val mapper = ObjectMapper()
 
     override suspend fun resolve(lnurlpUrl: String): LnurlEndpointInfo? = LnurlEndpointCache.getOrFetch(lnurlpUrl, ::fetch)
 
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index cfaf21993d..8ddf59c670 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -38,6 +38,7 @@ firebaseBom = "34.19.0"
 fragmentKtx = "1.9.0"
 gms = "4.5.0"
 healthConnect = "1.1.0"
+jackson = "2.22.2"
 jacksonModuleKotlin = "2.22.2"
 javaKeyring = "1.0.4"
 kmpTorRuntime = "2.6.0"
@@ -203,6 +204,7 @@ google-mlkit-genai-rewriting = { group = "com.google.mlkit", name = "genai-rewri
 google-mlkit-genai-image-description = { group = "com.google.mlkit", name = "genai-image-description", version.ref = "genaiImageDescription" }
 google-mlkit-language-id = { group = "com.google.mlkit", name = "language-id", version.ref = "languageId" }
 google-mlkit-translate = { group = "com.google.mlkit", name = "translate", version.ref = "translate" }
+jackson-databind = { group = "com.fasterxml.jackson.core", name = "jackson-databind", version.ref = "jackson" }
 jackson-module-kotlin = { group = "com.fasterxml.jackson.module", name = "jackson-module-kotlin", version.ref = "jacksonModuleKotlin" }
 java-keyring = { group = "com.github.javakeyring", name = "java-keyring", version.ref = "javaKeyring" }
 kmp-tor-runtime = { group = "io.matthewnelson.kmp-tor", name = "runtime", version.ref = "kmpTorRuntime" }
diff --git a/quartz/build.gradle.kts b/quartz/build.gradle.kts
index 9db22ebaf1..2ae70ca1cb 100644
--- a/quartz/build.gradle.kts
+++ b/quartz/build.gradle.kts
@@ -177,8 +177,16 @@ kotlin {
                 dependsOn(commonMain.get())
 
                 dependencies {
-                    // Performant Parser of JSONs into Events
-                    api(libs.jackson.module.kotlin)
+                    // Performant Parser of JSONs into Events.
+                    //
+                    // jackson-databind, NOT jackson-module-kotlin: the module exists to bind
+                    // Kotlin classes reflectively off their constructor parameter names, and
+                    // nothing in the app does that any more — every wire format goes through a
+                    // hand-written serializer or kotlinx. Dropping it takes kotlin-reflect with
+                    // it, which is ~1,000 classes of DEX the app never called. `cli` still
+                    // declares the module itself: it genuinely binds its config files
+                    // reflectively, and is never minified.
+                    api(libs.jackson.databind)
 
                     // Websockets API
                     implementation(libs.okhttp)
diff --git a/quartz/src/androidDeviceTest/kotlin/com/vitorpamplona/quartz/LargeDBSignatureCheck.kt b/quartz/src/androidDeviceTest/kotlin/com/vitorpamplona/quartz/LargeDBSignatureCheck.kt
index f7f5b655a0..555276c6d6 100644
--- a/quartz/src/androidDeviceTest/kotlin/com/vitorpamplona/quartz/LargeDBSignatureCheck.kt
+++ b/quartz/src/androidDeviceTest/kotlin/com/vitorpamplona/quartz/LargeDBSignatureCheck.kt
@@ -21,10 +21,10 @@
 package com.vitorpamplona.quartz
 
 import androidx.test.ext.junit.runners.AndroidJUnit4
-import com.fasterxml.jackson.module.kotlin.readValue
 import com.vitorpamplona.quartz.nip01Core.core.Event
 import com.vitorpamplona.quartz.nip01Core.crypto.verify
 import com.vitorpamplona.quartz.nip01Core.jackson.JacksonMapper
+import com.vitorpamplona.quartz.nip01Core.jackson.jacksonTypeRefOf
 import junit.framework.TestCase.assertEquals
 import kotlinx.coroutines.runBlocking
 import org.junit.Assert.assertTrue
@@ -41,8 +41,9 @@ class LargeDBSignatureCheck {
             val fullDBInputStream = javaClass.classLoader?.getResourceAsStream("nostr_vitor_short.json")
 
             val eventArray =
-                JacksonMapper.mapper.readValue<ArrayList<Event>>(
+                JacksonMapper.mapper.readValue(
                     InputStreamReader(fullDBInputStream),
+                    jacksonTypeRefOf<ArrayList<Event>>(),
                 ) as List<Event>
 
             var counter = 0
@@ -61,8 +62,9 @@ class LargeDBSignatureCheck {
             val fullDBInputStream = javaClass.classLoader?.getResourceAsStream("nostr_vitor_startup_data.json.gz")
 
             val eventArray =
-                JacksonMapper.mapper.readValue<ArrayList<Event>>(
+                JacksonMapper.mapper.readValue(
                     GZIPInputStream(fullDBInputStream),
+                    jacksonTypeRefOf<ArrayList<Event>>(),
                 ) as List<Event>
 
             var counter = 0
diff --git a/quartz/src/androidDeviceTest/kotlin/com/vitorpamplona/quartz/nip06KeyDerivation/Bip39MnemonicsTest.kt b/quartz/src/androidDeviceTest/kotlin/com/vitorpamplona/quartz/nip06KeyDerivation/Bip39MnemonicsTest.kt
index 9042339582..0eabd91da5 100644
--- a/quartz/src/androidDeviceTest/kotlin/com/vitorpamplona/quartz/nip06KeyDerivation/Bip39MnemonicsTest.kt
+++ b/quartz/src/androidDeviceTest/kotlin/com/vitorpamplona/quartz/nip06KeyDerivation/Bip39MnemonicsTest.kt
@@ -21,7 +21,7 @@
 package com.vitorpamplona.quartz.nip06KeyDerivation
 
 import androidx.test.ext.junit.runners.AndroidJUnit4
-import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import com.fasterxml.jackson.databind.ObjectMapper
 import com.vitorpamplona.quartz.nip01Core.core.toHexKey
 import com.vitorpamplona.quartz.utils.Hex
 import com.vitorpamplona.quartz.utils.RandomInstance
@@ -34,7 +34,7 @@ import org.junit.runner.RunWith
 @RunWith(AndroidJUnit4::class)
 class Bip39MnemonicsTest {
     private val tests =
-        jacksonObjectMapper()
+        ObjectMapper()
             .readTree(javaClass.classLoader?.getResourceAsStream("bip39.vectors.json"))
 
     @Test
diff --git a/quartz/src/androidMain/kotlin/com/vitorpamplona/quartz/nip55AndroidSigner/JsonMapperNip55.kt b/quartz/src/androidMain/kotlin/com/vitorpamplona/quartz/nip55AndroidSigner/JsonMapperNip55.kt
index 41123a7386..06e5867c6d 100644
--- a/quartz/src/androidMain/kotlin/com/vitorpamplona/quartz/nip55AndroidSigner/JsonMapperNip55.kt
+++ b/quartz/src/androidMain/kotlin/com/vitorpamplona/quartz/nip55AndroidSigner/JsonMapperNip55.kt
@@ -26,9 +26,8 @@ import com.fasterxml.jackson.databind.ObjectMapper
 import com.fasterxml.jackson.databind.module.SimpleModule
 import com.fasterxml.jackson.databind.node.ArrayNode
 import com.fasterxml.jackson.databind.node.ObjectNode
-import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
-import com.fasterxml.jackson.module.kotlin.readValue
 import com.vitorpamplona.quartz.nip01Core.jackson.InliningTagArrayPrettyPrinter
+import com.vitorpamplona.quartz.nip01Core.jackson.jacksonTypeRefOf
 import com.vitorpamplona.quartz.nip55AndroidSigner.api.foreground.intents.results.IntentResult
 import com.vitorpamplona.quartz.nip55AndroidSigner.api.foreground.intents.results.IntentResultJsonDeserializer
 import com.vitorpamplona.quartz.nip55AndroidSigner.api.foreground.intents.results.IntentResultJsonSerializer
@@ -39,7 +38,7 @@ import java.io.InputStream
 
 object JsonMapperNip55 {
     val defaultMapper: ObjectMapper =
-        jacksonObjectMapper()
+        ObjectMapper()
             .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
             .enable(JsonReadFeature.ALLOW_UNESCAPED_CONTROL_CHARS.mappedFeature())
             .setDefaultPrettyPrinter(InliningTagArrayPrettyPrinter())
@@ -51,9 +50,9 @@ object JsonMapperNip55 {
                     .addSerializer(Permission::class.java, PermissionSerializer()),
             )
 
-    inline fun <reified T> fromJsonTo(json: String): T = defaultMapper.readValue<T>(json)
+    inline fun <reified T> fromJsonTo(json: String): T = defaultMapper.readValue(json, jacksonTypeRefOf<T>())
 
-    inline fun <reified T> fromJsonTo(json: InputStream): T = defaultMapper.readValue<T>(json)
+    inline fun <reified T> fromJsonTo(json: InputStream): T = defaultMapper.readValue(json, jacksonTypeRefOf<T>())
 
     fun toJson(event: ArrayNode): String = defaultMapper.writeValueAsString(event)
 
diff --git a/quartz/src/jvmAndroid/kotlin/com/vitorpamplona/quartz/nip01Core/jackson/JacksonMapper.kt b/quartz/src/jvmAndroid/kotlin/com/vitorpamplona/quartz/nip01Core/jackson/JacksonMapper.kt
index e96f9431cd..ce818cf7f3 100644
--- a/quartz/src/jvmAndroid/kotlin/com/vitorpamplona/quartz/nip01Core/jackson/JacksonMapper.kt
+++ b/quartz/src/jvmAndroid/kotlin/com/vitorpamplona/quartz/nip01Core/jackson/JacksonMapper.kt
@@ -23,12 +23,10 @@ package com.vitorpamplona.quartz.nip01Core.jackson
 import com.fasterxml.jackson.core.json.JsonReadFeature
 import com.fasterxml.jackson.databind.DeserializationFeature
 import com.fasterxml.jackson.databind.JavaType
+import com.fasterxml.jackson.databind.ObjectMapper
 import com.fasterxml.jackson.databind.module.SimpleModule
 import com.fasterxml.jackson.databind.node.ArrayNode
 import com.fasterxml.jackson.databind.node.ObjectNode
-import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
-import com.fasterxml.jackson.module.kotlin.jacksonTypeRef
-import com.fasterxml.jackson.module.kotlin.readValue
 import com.vitorpamplona.quartz.nip01Core.core.Event
 import com.vitorpamplona.quartz.nip01Core.core.OptimizedSerializable
 import com.vitorpamplona.quartz.nip01Core.core.RawJson
@@ -64,7 +62,7 @@ class JacksonMapper {
         val defaultPrettyPrinter = InliningTagArrayPrettyPrinter()
 
         val mapper =
-            jacksonObjectMapper()
+            ObjectMapper()
                 .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
                 .configure(DeserializationFeature.FAIL_ON_TRAILING_TOKENS, false)
                 .configure(DeserializationFeature.UNWRAP_ROOT_VALUE, false)
@@ -104,13 +102,13 @@ class JacksonMapper {
         /**
          * Shortcuts
          */
-        val eventTypeInstance: JavaType = mapper.typeFactory.constructType(jacksonTypeRef<Event>())
-        val tagArrayTypeInstance: JavaType = mapper.typeFactory.constructType(jacksonTypeRef<TagArray>())
-        val rumorTypeInstance: JavaType = mapper.typeFactory.constructType(jacksonTypeRef<Rumor>())
-        val eventTemplateTypeInstance: JavaType = mapper.typeFactory.constructType(jacksonTypeRef<EventTemplate<Event>>())
-        val eventListTypeInstance: JavaType = mapper.typeFactory.constructType(jacksonTypeRef<List<Event>>())
-        val messageTypeInstance: JavaType = mapper.typeFactory.constructType(jacksonTypeRef<Message>())
-        val commandTypeInstance: JavaType = mapper.typeFactory.constructType(jacksonTypeRef<Command>())
+        val eventTypeInstance: JavaType = mapper.typeFactory.constructType(jacksonTypeRefOf<Event>())
+        val tagArrayTypeInstance: JavaType = mapper.typeFactory.constructType(jacksonTypeRefOf<TagArray>())
+        val rumorTypeInstance: JavaType = mapper.typeFactory.constructType(jacksonTypeRefOf<Rumor>())
+        val eventTemplateTypeInstance: JavaType = mapper.typeFactory.constructType(jacksonTypeRefOf<EventTemplate<Event>>())
+        val eventListTypeInstance: JavaType = mapper.typeFactory.constructType(jacksonTypeRefOf<List<Event>>())
+        val messageTypeInstance: JavaType = mapper.typeFactory.constructType(jacksonTypeRefOf<Message>())
+        val commandTypeInstance: JavaType = mapper.typeFactory.constructType(jacksonTypeRefOf<Command>())
 
         fun fromJson(json: String): Event = mapper.readValue(json, eventTypeInstance)
 
@@ -169,12 +167,12 @@ class JacksonMapper {
 
         inline fun <reified T : OptimizedSerializable> fromJsonTo(json: String): T {
             checkRegistered(T::class)
-            return mapper.readValue<T>(json)
+            return mapper.readValue(json, jacksonTypeRefOf<T>())
         }
 
         inline fun <reified T : OptimizedSerializable> fromJsonTo(json: InputStream): T {
             checkRegistered(T::class)
-            return mapper.readValue<T>(json)
+            return mapper.readValue(json, jacksonTypeRefOf<T>())
         }
 
         fun toJson(event: Event): String = EventManualSerializer.toJson(event.id, event.pubKey, event.createdAt, event.kind, event.tags, event.content, event.sig)
diff --git a/quartz/src/jvmAndroid/kotlin/com/vitorpamplona/quartz/nip01Core/jackson/JacksonTypeRef.kt b/quartz/src/jvmAndroid/kotlin/com/vitorpamplona/quartz/nip01Core/jackson/JacksonTypeRef.kt
new file mode 100644
index 0000000000..1670f58bce
--- /dev/null
+++ b/quartz/src/jvmAndroid/kotlin/com/vitorpamplona/quartz/nip01Core/jackson/JacksonTypeRef.kt
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.quartz.nip01Core.jackson
+
+import com.fasterxml.jackson.core.type.TypeReference
+
+/**
+ * A [TypeReference] carrying the full generic type, e.g. `List<Event>`.
+ *
+ * This is the one thing the app used jackson-module-kotlin for that plain
+ * jackson-databind has no equivalent of — and it is a one-liner, because `reified`
+ * substitutes the concrete type into the anonymous subclass before erasure can
+ * lose it. `T::class.java` cannot replace it: for `List<Event>` that erases to
+ * `List`, and every element comes back a LinkedHashMap.
+ *
+ * Copied here rather than kept as a dependency so the Kotlin module — and
+ * kotlin-reflect behind it, ~1,000 classes — can leave the app. The CLI still
+ * depends on the module directly, because it genuinely binds reflectively and is
+ * never minified.
+ */
+inline fun <reified T> jacksonTypeRefOf(): TypeReference<T> = object : TypeReference<T>() {}
diff --git a/quartz/src/jvmAndroidTest/kotlin/com/vitorpamplona/quartz/nip01Core/jackson/InliningTagArrayPrettyPrinterTest.kt b/quartz/src/jvmAndroidTest/kotlin/com/vitorpamplona/quartz/nip01Core/jackson/InliningTagArrayPrettyPrinterTest.kt
index be489b5aae..df327e132d 100644
--- a/quartz/src/jvmAndroidTest/kotlin/com/vitorpamplona/quartz/nip01Core/jackson/InliningTagArrayPrettyPrinterTest.kt
+++ b/quartz/src/jvmAndroidTest/kotlin/com/vitorpamplona/quartz/nip01Core/jackson/InliningTagArrayPrettyPrinterTest.kt
@@ -20,13 +20,13 @@
  */
 package com.vitorpamplona.quartz.nip01Core.jackson
 
-import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import com.fasterxml.jackson.databind.ObjectMapper
 import kotlin.test.Test
 import kotlin.test.assertEquals
 
 class InliningTagArrayPrettyPrinterTest {
     val mapper =
-        jacksonObjectMapper().apply {
+        ObjectMapper().apply {
             setDefaultPrettyPrinter(InliningTagArrayPrettyPrinter())
         }
 
diff --git a/quic/src/jvmTest/kotlin/com/vitorpamplona/quic/interop/QlogWriter.kt b/quic/src/jvmTest/kotlin/com/vitorpamplona/quic/interop/QlogWriter.kt
index 585d17c3e6..eba66bd774 100644
--- a/quic/src/jvmTest/kotlin/com/vitorpamplona/quic/interop/QlogWriter.kt
+++ b/quic/src/jvmTest/kotlin/com/vitorpamplona/quic/interop/QlogWriter.kt
@@ -21,7 +21,6 @@
 package com.vitorpamplona.quic.interop
 
 import com.fasterxml.jackson.databind.ObjectMapper
-import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
 import com.vitorpamplona.quic.connection.EncryptionLevel
 import com.vitorpamplona.quic.observability.QlogObserver
 import java.io.BufferedWriter
@@ -295,7 +294,7 @@ class QlogWriter(
     }
 
     companion object {
-        private val DEFAULT_MAPPER: ObjectMapper = jacksonObjectMapper()
+        private val DEFAULT_MAPPER: ObjectMapper = ObjectMapper()
 
         private fun packetTypeFor(level: EncryptionLevel): String =
             when (level) {
diff --git a/quic/src/jvmTest/kotlin/com/vitorpamplona/quic/interop/QlogWriterTest.kt b/quic/src/jvmTest/kotlin/com/vitorpamplona/quic/interop/QlogWriterTest.kt
index 72f5d13845..f6e20de0f1 100644
--- a/quic/src/jvmTest/kotlin/com/vitorpamplona/quic/interop/QlogWriterTest.kt
+++ b/quic/src/jvmTest/kotlin/com/vitorpamplona/quic/interop/QlogWriterTest.kt
@@ -20,7 +20,7 @@
  */
 package com.vitorpamplona.quic.interop
 
-import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import com.fasterxml.jackson.databind.ObjectMapper
 import com.vitorpamplona.quic.connection.EncryptionLevel
 import org.junit.Test
 import java.io.File
@@ -73,7 +73,7 @@ class QlogWriterTest {
         val lines = tmp.readLines().filter { it.isNotBlank() }
         assertTrue(lines.size >= 12, "expected >= 12 lines (header + at least 11 events) but got ${lines.size}")
 
-        val mapper = jacksonObjectMapper()
+        val mapper = ObjectMapper()
 
         // Line 1: qlog header.
         val header = mapper.readTree(lines[0])
@@ -128,7 +128,7 @@ class QlogWriterTest {
             w.onAlpnNegotiated("h3")
         }
         val lines = tmp.readLines().filter { it.isNotBlank() }
-        val mapper = jacksonObjectMapper()
+        val mapper = ObjectMapper()
         val event = mapper.readTree(lines[1])
         assertEquals(50L, event.get("time").asLong(), "time must be relative to constructor (1050 - 1000)")
     }
@@ -152,7 +152,7 @@ class QlogWriterTest {
             QlogWriter(tmp, odcidHex = "00").use { w ->
                 w.onPacketSent(EncryptionLevel.INITIAL, 0, 1200, emptyList())
             }
-            val mapper = jacksonObjectMapper()
+            val mapper = ObjectMapper()
             val lines = tmp.readLines().filter { it.isNotBlank() }
             val frames = mapper.readTree(lines[1]).get("data").get("frames")
             assertTrue(frames.isArray, "frames must be an array even when empty")