diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpDecryptVerify.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpDecryptVerify.java
index 7d113241b..828bee848 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpDecryptVerify.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/PgpDecryptVerify.java
@@ -523,13 +523,7 @@ public class PgpDecryptVerify {
 
                 // update signature buffer if signature is also present
                 if (signature != null) {
-                    try {
-                        signature.update(buffer, 0, length);
-                    } catch (SignatureException e) {
-                        Log.e(Constants.TAG, "SignatureException -> Not a valid signature!", e);
-                        signatureResultBuilder.validSignature(false);
-                        signature = null;
-                    }
+                    signature.update(buffer, 0, length);
                 }
 
                 alreadyWritten += length;
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/WrappedSignature.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/WrappedSignature.java
index 03dbe4860..f24259ba7 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/WrappedSignature.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/pgp/WrappedSignature.java
@@ -96,9 +96,6 @@ public class WrappedSignature {
         } catch (PGPException e) {
             // no matter
             Log.e(Constants.TAG, "exception reading embedded signatures", e);
-        } catch (IOException e) {
-            // no matter
-            Log.e(Constants.TAG, "exception reading embedded signatures", e);
         }
         return sigs;
     }
@@ -150,27 +147,17 @@ public class WrappedSignature {
         }
     }
 
-    public void update(byte[] data, int offset, int length) throws PgpGeneralException {
-        try {
-            mSig.update(data, offset, length);
-        } catch(SignatureException e) {
-            throw new PgpGeneralException(e);
-        }
+    public void update(byte[] data, int offset, int length) {
+        mSig.update(data, offset, length);
     }
 
-    public void update(byte data) throws PgpGeneralException {
-        try {
-            mSig.update(data);
-        } catch(SignatureException e) {
-            throw new PgpGeneralException(e);
-        }
+    public void update(byte data) {
+        mSig.update(data);
     }
 
     public boolean verify() throws PgpGeneralException {
         try {
             return mSig.verify();
-        } catch(SignatureException e) {
-            throw new PgpGeneralException(e);
         } catch(PGPException e) {
             throw new PgpGeneralException(e);
         }
@@ -179,8 +166,6 @@ public class WrappedSignature {
     boolean verifySignature(PGPPublicKey key) throws PgpGeneralException {
         try {
             return mSig.verifyCertification(key);
-        } catch (SignatureException e) {
-            throw new PgpGeneralException("Sign!", e);
         } catch (PGPException e) {
             throw new PgpGeneralException("Error!", e);
         }
@@ -189,8 +174,6 @@ public class WrappedSignature {
     boolean verifySignature(PGPPublicKey masterKey, PGPPublicKey subKey) throws PgpGeneralException {
         try {
             return mSig.verifyCertification(masterKey, subKey);
-        } catch (SignatureException e) {
-            throw new PgpGeneralException("Sign!", e);
         } catch (PGPException e) {
             throw new PgpGeneralException("Error!", e);
         }
@@ -199,8 +182,6 @@ public class WrappedSignature {
     boolean verifySignature(PGPPublicKey key, String uid) throws PgpGeneralException {
         try {
             return mSig.verifyCertification(uid, key);
-        } catch (SignatureException e) {
-            throw new PgpGeneralException("Error!", e);
         } catch (PGPException e) {
             throw new PgpGeneralException("Error!", e);
         }
diff --git a/extern/spongycastle b/extern/spongycastle
index 512965ac6..d65458612 160000
--- a/extern/spongycastle
+++ b/extern/spongycastle
@@ -1 +1 @@
-Subproject commit 512965ac61c2b0054550e8daed71242d51f4da58
+Subproject commit d65458612838f7de0b222c0b7168db97018cac32