diff --git a/drongo b/drongo
index 567294a4..42ffeb95 160000
--- a/drongo
+++ b/drongo
@@ -1 +1 @@
-Subproject commit 567294a4b055cc062650de45fccbbc89db714f39
+Subproject commit 42ffeb95650c56bffbd5ec8f8e8f38d91faaab3f
diff --git a/src/main/java/com/sparrowwallet/sparrow/AppController.java b/src/main/java/com/sparrowwallet/sparrow/AppController.java
index 10bf5293..513943ad 100644
--- a/src/main/java/com/sparrowwallet/sparrow/AppController.java
+++ b/src/main/java/com/sparrowwallet/sparrow/AppController.java
@@ -18,6 +18,7 @@ import com.sparrowwallet.drongo.protocol.Transaction;
 import com.sparrowwallet.drongo.psbt.PSBT;
 import com.sparrowwallet.drongo.psbt.PSBTInput;
 import com.sparrowwallet.drongo.psbt.PSBTParseException;
+import com.sparrowwallet.drongo.psbt.PSBTSignatureException;
 import com.sparrowwallet.drongo.wallet.*;
 import com.sparrowwallet.sparrow.control.*;
 import com.sparrowwallet.sparrow.event.*;
@@ -1176,7 +1177,8 @@ public class AppController implements Initializable {
 
     private void addTransactionTab(String name, File file, byte[] bytes) throws PSBTParseException, ParseException, TransactionParseException {
         if(PSBT.isPSBT(bytes)) {
-            PSBT psbt = new PSBT(bytes);
+            //Don't verify signatures here - provided PSBT may omit UTXO data that can be found when combining with an existing PSBT
+            PSBT psbt = new PSBT(bytes, false);
             addTransactionTab(name, file, psbt);
         } else if(Transaction.isTransaction(bytes)) {
             try {
@@ -1252,6 +1254,16 @@ public class AppController implements Initializable {
             }
         }
 
+        if(psbt != null) {
+            try {
+                //Any PSBTs that have reached this point could not be combined with an existing PSBT. Verify signatures before continuing
+                psbt.verifySignatures();
+            } catch(PSBTSignatureException e) {
+                AppServices.showErrorDialog("Invalid PSBT", e.getMessage());
+                return;
+            }
+        }
+
         try {
             String tabName = name;
 
diff --git a/src/main/java/com/sparrowwallet/sparrow/control/QRScanDialog.java b/src/main/java/com/sparrowwallet/sparrow/control/QRScanDialog.java
index 8bd1b1c9..27d81dd2 100644
--- a/src/main/java/com/sparrowwallet/sparrow/control/QRScanDialog.java
+++ b/src/main/java/com/sparrowwallet/sparrow/control/QRScanDialog.java
@@ -209,7 +209,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
                 if(parts.stream().filter(Objects::nonNull).count() == n) {
                     String complete = String.join("", parts);
                     try {
-                        PSBT psbt = PSBT.fromString(complete);
+                        PSBT psbt = PSBT.fromString(complete, false);
                         result = new Result(psbt);
                         return;
                     } catch(PSBTParseException e) {
@@ -261,7 +261,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
                 }
 
                 try {
-                    psbt = PSBT.fromString(qrtext);
+                    psbt = PSBT.fromString(qrtext, false);
                     result = new Result(psbt);
                     return;
                 } catch(PSBTParseException e) {
@@ -273,7 +273,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
                 }
 
                 try {
-                    psbt = new PSBT(qrResult.getRawBytes());
+                    psbt = new PSBT(qrResult.getRawBytes(), false);
                     result = new Result(psbt);
                     return;
                 } catch(Exception e) {
@@ -298,7 +298,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
 
                 //Try Base43 used by Electrum
                 try {
-                    psbt = new PSBT(Base43.decode(qrtext));
+                    psbt = new PSBT(Base43.decode(qrtext), false);
                     result = new Result(psbt);
                     return;
                 } catch(Exception e) {
@@ -324,7 +324,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
                 if(urRegistryType.equals(RegistryType.BYTES)) {
                     byte[] urBytes = (byte[])ur.decodeFromRegistry();
                     try {
-                        PSBT psbt = new PSBT(urBytes);
+                        PSBT psbt = new PSBT(urBytes, false);
                         return new Result(psbt);
                     } catch(PSBTParseException e) {
                         if(PSBT.isPSBT(urBytes)) {
@@ -354,7 +354,7 @@ public class QRScanDialog extends Dialog<QRScanDialog.Result> {
                 } else if(urRegistryType.equals(RegistryType.CRYPTO_PSBT)) {
                     CryptoPSBT cryptoPSBT = (CryptoPSBT)ur.decodeFromRegistry();
                     try {
-                        PSBT psbt = new PSBT(cryptoPSBT.getPsbt());
+                        PSBT psbt = new PSBT(cryptoPSBT.getPsbt(), false);
                         return new Result(psbt);
                     } catch(Exception e) {
                         log.error("Error parsing PSBT from UR type " + urRegistryType, e);