diff --git a/pom.xml b/pom.xml
index 058a8a6..d590a21 100644
--- a/pom.xml
+++ b/pom.xml
@@ -188,6 +188,10 @@
 			<version>2.1.7</version>
 		</dependency>
 
+		<dependency>
+			<groupId>mysql</groupId>
+			<artifactId>mysql-connector-java</artifactId>
+		</dependency>
 	</dependencies>
 
 	<build>
diff --git a/src/main/java/de/kreth/invoice/security/UserManager.java b/src/main/java/de/kreth/invoice/security/UserManager.java
index 1690082..4257785 100644
--- a/src/main/java/de/kreth/invoice/security/UserManager.java
+++ b/src/main/java/de/kreth/invoice/security/UserManager.java
@@ -55,9 +55,9 @@ public class UserManager {
     private boolean hasChanges(User user, AccessToken accessToken) {
 	boolean result = false;
 
-	if (!accessToken.getGivenName().contentEquals(user.getGivenName())
-		|| !accessToken.getFamilyName().contentEquals(user.getFamilyName())
-		|| !accessToken.getEmail().contentEquals(user.getEmail())) {
+	if (!accessToken.getGivenName().equals(user.getGivenName())
+		|| !accessToken.getFamilyName().equals(user.getFamilyName())
+		|| !accessToken.getEmail().equals(user.getEmail())) {
 	    result = true;
 	    user.setPrincipal(accessToken);
 	}