diff --git a/src/org/redkale/convert/Factory.java b/src/org/redkale/convert/Factory.java
index b38231a9a..7a040c2f7 100644
--- a/src/org/redkale/convert/Factory.java
+++ b/src/org/redkale/convert/Factory.java
@@ -83,6 +83,7 @@ public abstract class Factory<R extends Reader, W extends Writer> {
             this.register(Number.class, NumberSimpledCoder.instance);
             this.register(String.class, StringSimpledCoder.instance);
             this.register(CharSequence.class, CharSequenceSimpledCoder.instance);
+            this.register(StringBuilder.class, CharSequenceSimpledCoder.instance);
             this.register(java.util.Date.class, DateSimpledCoder.instance);
             this.register(BigInteger.class, BigIntegerSimpledCoder.instance);
             this.register(InetAddress.class, InetAddressSimpledCoder.instance);