diff --git a/WASignalGroup/group_cipher.js b/WASignalGroup/group_cipher.js
index a10de25..3c126f4 100644
--- a/WASignalGroup/group_cipher.js
+++ b/WASignalGroup/group_cipher.js
@@ -41,7 +41,7 @@ class GroupCipher {
     const senderKeyMessage = new SenderKeyMessage(null, null, null, null, senderKeyMessageBytes);
 
     const senderKeyState = record.getSenderKeyState(senderKeyMessage.getKeyId());
-    //senderKeyMessage.verifySignature(senderKeyState.getSigningKeyPublic());
+    senderKeyMessage.verifySignature(senderKeyState.getSigningKeyPublic());
     const senderKey = this.getSenderKey(senderKeyState, senderKeyMessage.getIteration());
     // senderKeyState.senderKeyStateStructure.senderSigningKey.private =
 
diff --git a/WASignalGroup/sender_key_distribution_message.js b/WASignalGroup/sender_key_distribution_message.js
index 9c1400f..77c2a48 100644
--- a/WASignalGroup/sender_key_distribution_message.js
+++ b/WASignalGroup/sender_key_distribution_message.js
@@ -17,7 +17,7 @@ class SenderKeyDistributionMessage extends CiphertextMessage {
 
         const distributionMessage = protobufs.SenderKeyDistributionMessage.decode(
           message
-        ).toJSON();
+        );
         this.serialized = serialized;
         this.id = distributionMessage.id;
         this.iteration = distributionMessage.iteration;
diff --git a/WASignalGroup/sender_key_message.js b/WASignalGroup/sender_key_message.js
index 80683a6..f3d9cf9 100644
--- a/WASignalGroup/sender_key_message.js
+++ b/WASignalGroup/sender_key_message.js
@@ -17,8 +17,8 @@ class SenderKeyMessage extends CiphertextMessage {
       const version = serialized[0];
       const message = serialized.slice(1, serialized.length - this.SIGNATURE_LENGTH);
       const signature = serialized.slice(-1 * this.SIGNATURE_LENGTH);
-      const senderKeyMessage = protobufs.SenderKeyMessage.decode(message).toJSON();
-      senderKeyMessage.ciphertext = Buffer.from(senderKeyMessage.ciphertext, 'base64');
+      const senderKeyMessage = protobufs.SenderKeyMessage.decode(message);
+      senderKeyMessage.ciphertext = senderKeyMessage.ciphertext;
 
       this.serialized = serialized;
       this.messageVersion = (version & 0xff) >> 4;
@@ -64,7 +64,7 @@ class SenderKeyMessage extends CiphertextMessage {
   }
 
   verifySignature(signatureKey) {
-    const part1 = this.serialized.slice(0, this.serialized.length - this.SIGNATURE_LENGTH + 1);
+    const part1 = this.serialized.slice(0, this.serialized.length - this.SIGNATURE_LENGTH);
     const part2 = this.serialized.slice(-1 * this.SIGNATURE_LENGTH);
     const res = curve.verifySignature(signatureKey, part1, part2);
     if (!res) throw new Error('Invalid signature!');