diff --git a/android/build.gradle b/android/build.gradle
index ae03cbd..0538823 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -8,8 +8,8 @@ android {
     defaultConfig {
         minSdkVersion 19
         targetSdkVersion 28
-        versionCode 303
-        versionName "3.0.3"
+        versionCode 304
+        versionName "3.0.4"
     }
 
     compileOptions {
diff --git a/lib/src/main/java/im/status/keycard/applet/SecureChannelSession.java b/lib/src/main/java/im/status/keycard/applet/SecureChannelSession.java
index 8346ac0..28013d9 100644
--- a/lib/src/main/java/im/status/keycard/applet/SecureChannelSession.java
+++ b/lib/src/main/java/im/status/keycard/applet/SecureChannelSession.java
@@ -120,7 +120,7 @@ public class SecureChannelSession {
    */
   public void autoOpenSecureChannel(CardChannel apduChannel) throws IOException, APDUException {
     APDUResponse response = openSecureChannel(apduChannel, pairing.getPairingIndex(), publicKey);
-
+    response.checkOK("OPEN SECURE CHANNEL failed");
     processOpenSecureChannelResponse(response);
 
     response = mutuallyAuthenticate(apduChannel);