diff --git a/src/org/redkale/convert/Factory.java b/src/org/redkale/convert/Factory.java
index 56be011a1..79533ba31 100644
--- a/src/org/redkale/convert/Factory.java
+++ b/src/org/redkale/convert/Factory.java
@@ -48,7 +48,7 @@ public abstract class Factory<R extends Reader, W extends Writer> {
 
     private final ConcurrentHashMap<Type, Encodeable<W, ?>> encoders = new ConcurrentHashMap();
 
-    private final HashMap<AccessibleObject, ConvertColumnEntry> columnEntrys = new HashMap();
+    private final ConcurrentHashMap<AccessibleObject, ConvertColumnEntry> columnEntrys = new ConcurrentHashMap();
 
     private final Set<Class> skipIgnores = new HashSet();