diff --git a/src/main/java/cn/lihongjie/coal/config/MyPostgreSQLDialect.java b/src/main/java/cn/lihongjie/coal/config/MyPostgreSQLDialect.java
new file mode 100644
index 00000000..9cd847c1
--- /dev/null
+++ b/src/main/java/cn/lihongjie/coal/config/MyPostgreSQLDialect.java
@@ -0,0 +1,15 @@
+package cn.lihongjie.coal.config;
+
+import org.hibernate.dialect.PostgreSQLDialect;
+import org.hibernate.type.SqlTypes;
+
+public class MyPostgreSQLDialect extends PostgreSQLDialect {
+
+    @Override
+    protected String columnType(int sqlTypeCode) {
+        if (sqlTypeCode == SqlTypes.VARCHAR) {
+            return "text";
+        }
+        return super.columnType(sqlTypeCode);
+    }
+}