diff --git a/src/main/java/de/gnmyt/SQLToolkit/types/LoginParam.java b/src/main/java/de/gnmyt/SQLToolkit/types/LoginParam.java
index ac539e4..2f86856 100644
--- a/src/main/java/de/gnmyt/SQLToolkit/types/LoginParam.java
+++ b/src/main/java/de/gnmyt/SQLToolkit/types/LoginParam.java
@@ -11,7 +11,7 @@ public enum LoginParam {
     USE_TIMEZONE("useTimezone=true"),
     TIMEZONE_UTC("serverTimezone=UTC");
 
-    private String value;
+    private final String value;
 
     /**
      * Basic constructor for the LoginParam enum