diff --git a/openid-connect-client/src/main/java/org/mitre/openid/connect/client/service/impl/JsonFileRegisteredClientService.java b/openid-connect-client/src/main/java/org/mitre/openid/connect/client/service/impl/JsonFileRegisteredClientService.java
index 68cfd1008..49e04fc7e 100644
--- a/openid-connect-client/src/main/java/org/mitre/openid/connect/client/service/impl/JsonFileRegisteredClientService.java
+++ b/openid-connect-client/src/main/java/org/mitre/openid/connect/client/service/impl/JsonFileRegisteredClientService.java
@@ -97,6 +97,7 @@ public class JsonFileRegisteredClientService implements RegisteredClientService
 	/**
 	 * Sync the map of clients out to disk.
 	 */
+	@SuppressWarnings("serial")
 	private void write() {
 		try {
 			if (!file.exists()) {
@@ -120,6 +121,7 @@ public class JsonFileRegisteredClientService implements RegisteredClientService
 	/**
 	 * Load the map in from disk.
 	 */
+	@SuppressWarnings("serial")
 	private void load() {
 		try {
 			if (!file.exists()) {