diff --git a/openid-connect-common/src/main/java/org/mitre/oauth2/model/convert/SimpleGrantedAuthorityStringConverter.java b/openid-connect-common/src/main/java/org/mitre/oauth2/model/convert/SimpleGrantedAuthorityStringConverter.java
index 875387508..ba7b778bb 100644
--- a/openid-connect-common/src/main/java/org/mitre/oauth2/model/convert/SimpleGrantedAuthorityStringConverter.java
+++ b/openid-connect-common/src/main/java/org/mitre/oauth2/model/convert/SimpleGrantedAuthorityStringConverter.java
@@ -19,17 +19,19 @@ package org.mitre.oauth2.model.convert;
 import javax.persistence.AttributeConverter;
 import javax.persistence.Converter;
 
+import org.springframework.security.core.GrantedAuthority;
 import org.springframework.security.core.authority.SimpleGrantedAuthority;
 
+
 /**
  * @author jricher
  *
  */
 @Converter
-public class SimpleGrantedAuthorityStringConverter implements AttributeConverter<SimpleGrantedAuthority, String> {
+public class SimpleGrantedAuthorityStringConverter implements AttributeConverter<GrantedAuthority, String> {
 
 	@Override
-	public String convertToDatabaseColumn(SimpleGrantedAuthority attribute) {
+	public String convertToDatabaseColumn(GrantedAuthority attribute) {
 		if (attribute != null) {
 			return attribute.getAuthority();
 		} else {
@@ -38,7 +40,7 @@ public class SimpleGrantedAuthorityStringConverter implements AttributeConverter
 	}
 
 	@Override
-	public SimpleGrantedAuthority convertToEntityAttribute(String dbData) {
+	public GrantedAuthority convertToEntityAttribute(String dbData) {
 		if (dbData != null) {
 			return new SimpleGrantedAuthority(dbData);
 		} else {