diff --git a/OCPP-J/src/main/java/eu/chargetime/ocpp/JSONConfiguration.java b/OCPP-J/src/main/java/eu/chargetime/ocpp/JSONConfiguration.java
index 78255043..6b1a93f9 100644
--- a/OCPP-J/src/main/java/eu/chargetime/ocpp/JSONConfiguration.java
+++ b/OCPP-J/src/main/java/eu/chargetime/ocpp/JSONConfiguration.java
@@ -58,11 +58,13 @@ public <T> JSONConfiguration setParameter(String name, T value) {
     return this;
   }
 
+  @SuppressWarnings("unchecked")
   public <T> T getParameter(String name) {
     //noinspection unchecked
     return (T) parameters.get(name);
   }
 
+  @SuppressWarnings("unchecked")
   public <T> T getParameter(String name, T defaultValue) {
     //noinspection unchecked
     T value = (T) parameters.get(name);