diff --git a/openid-connect-common/src/main/java/org/mitre/jwt/encryption/impl/RsaEncrypter.java b/openid-connect-common/src/main/java/org/mitre/jwt/encryption/impl/RsaEncrypter.java
index 7946fdf78..06bf46c0d 100644
--- a/openid-connect-common/src/main/java/org/mitre/jwt/encryption/impl/RsaEncrypter.java
+++ b/openid-connect-common/src/main/java/org/mitre/jwt/encryption/impl/RsaEncrypter.java
@@ -96,7 +96,7 @@ public class RsaEncrypter extends AbstractJweEncrypter {
 		String encMethod = jwe.getHeader().getEncryptionMethod();
 		//TODO: should also check for A128GCM and A256GCM, but Cipher.getInstance() does not support the GCM mode. For now, don't use them
 		if(encMethod.equals("A128CBC") || encMethod.equals("A256CBC")) {
-			
+			// FIXME: this is fragile
 			String delims = "[8,6]+";
 			String[] mode = encMethod.split(delims);
 			
diff --git a/openid-connect-common/src/test/java/org/mitre/jwe/encryption/impl/RsaEncrypterDecrypterTest.java b/openid-connect-common/src/test/java/org/mitre/jwe/encryption/impl/RsaEncrypterDecrypterTest.java
index 919cf8620..9e03137af 100644
--- a/openid-connect-common/src/test/java/org/mitre/jwe/encryption/impl/RsaEncrypterDecrypterTest.java
+++ b/openid-connect-common/src/test/java/org/mitre/jwe/encryption/impl/RsaEncrypterDecrypterTest.java
@@ -59,7 +59,7 @@ public class RsaEncrypterDecrypterTest {
 		Jwe jwe = new Jwe(new JweHeader(jweHeaderObject), null, jwePlaintextString.getBytes(), null);
 		//generate key pair. this will be passed in from the user
 		KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");
-		keyGen.initialize(4096);
+		keyGen.initialize(512);
 		KeyPair pair = keyGen.generateKeyPair();
 		PublicKey publicKey = pair.getPublic();
 		PrivateKey privateKey = pair.getPrivate();