diff --git a/build.gradle b/build.gradle
index 150495c0..6baea43d 100644
--- a/build.gradle
+++ b/build.gradle
@@ -99,7 +99,7 @@ dependencies {
     }
     implementation('com.sparrowwallet.bokmakierie:bokmakierie:1.0')
     implementation('com.sparrowwallet:tern:1.0.6')
-    implementation('io.reactivex.rxjava2:rxjava:2.2.15')
+    implementation('io.reactivex.rxjava2:rxjava:2.2.21')
     implementation('io.reactivex.rxjava2:rxjavafx:2.2.2')
     implementation('org.apache.commons:commons-lang3:3.20.0')
     implementation('org.apache.commons:commons-compress:1.28.0')
diff --git a/lark b/lark
index 9a7d6a08..5244072d 160000
--- a/lark
+++ b/lark
@@ -1 +1 @@
-Subproject commit 9a7d6a088289f516528fed132bbde82604f713bd
+Subproject commit 5244072d8d5419e7b1d85367adc5246c8a0e805c