diff --git a/leaves-server/src/main/java/org/leavesmc/leaves/LeavesConfig.java b/leaves-server/src/main/java/org/leavesmc/leaves/LeavesConfig.java
index b43607b1..a6c6bb64 100644
--- a/leaves-server/src/main/java/org/leavesmc/leaves/LeavesConfig.java
+++ b/leaves-server/src/main/java/org/leavesmc/leaves/LeavesConfig.java
@@ -932,7 +932,7 @@ public final class LeavesConfig {
                     @Override
                     public void verify(Long old, Long value) throws IllegalArgumentException {
                         if (value <= 0) {
-                            throw new IllegalArgumentException("Max nbt size can not be <= 0!");
+                            throw new IllegalArgumentException("Max nbt size can not be <= 0");
                         }
                     }
                 }
diff --git a/leaves-server/src/main/java/org/leavesmc/leaves/config/ConfigValidatorImpl.java b/leaves-server/src/main/java/org/leavesmc/leaves/config/ConfigValidatorImpl.java
index 99860f29..2ffad68e 100644
--- a/leaves-server/src/main/java/org/leavesmc/leaves/config/ConfigValidatorImpl.java
+++ b/leaves-server/src/main/java/org/leavesmc/leaves/config/ConfigValidatorImpl.java
@@ -36,6 +36,14 @@ public abstract class ConfigValidatorImpl<E> implements ConfigValidator<E> {
         public Long stringConvert(String value) throws IllegalArgumentException {
             return Long.parseLong(value);
         }
+
+        @Override
+        public Long loadConvert(Object value) throws IllegalArgumentException {
+            if (value instanceof Integer) {
+                return Long.valueOf((Integer) value);
+            }
+            return (Long) value;
+        }
     }
 
     public static class StringConfigValidator extends ConfigValidatorImpl<String> {