diff --git a/src/main/java/com/extendedclip/deluxemenus/persistentmeta/PersistentMetaHandler.java b/src/main/java/com/extendedclip/deluxemenus/persistentmeta/PersistentMetaHandler.java
index 799a63f..bab7d85 100644
--- a/src/main/java/com/extendedclip/deluxemenus/persistentmeta/PersistentMetaHandler.java
+++ b/src/main/java/com/extendedclip/deluxemenus/persistentmeta/PersistentMetaHandler.java
@@ -262,7 +262,7 @@ public <T> Map<String, T> getMetaValues(
             return OperationResult.SUCCESS;
         }
 
-        final long newValue = (long) (currentValue == null ? 0 : currentValue) + value.longValue();
+        final long newValue = ((Number) (currentValue == null ? 0 : currentValue)).longValue() + value.longValue();
         player.getPersistentDataContainer().set(key, type.getPDType(), newValue);
         return OperationResult.SUCCESS;
     }
@@ -302,7 +302,7 @@ public <T> Map<String, T> getMetaValues(
             return OperationResult.SUCCESS;
         }
 
-        final long newValue = (long) (currentValue == null ? 0 : currentValue) - value.longValue();
+        final long newValue = ((Number) (currentValue == null ? 0 : currentValue)).longValue() - value.longValue();
         player.getPersistentDataContainer().set(key, type.getPDType(), newValue);
         return OperationResult.SUCCESS;
     }