diff --git a/broker/src/main/resources/c3p0-config.xml b/broker/src/main/resources/c3p0-config.xml
index 5a78e80b..ddbe308f 100755
--- a/broker/src/main/resources/c3p0-config.xml
+++ b/broker/src/main/resources/c3p0-config.xml
@@ -15,7 +15,7 @@
         <!--MySQL数据库驱动程序-->
         <property name="driverClass">com.mysql.cj.jdbc.Driver</property>
         <!--MySQL数据库地址-->
-        <property name="jdbcUrl">jdbc:mysql://localhost:3306/wfchat?useSSL=false&amp;serverTimezone=GMT%2B8&amp;allowPublicKeyRetrieval=true&amp;useUnicode=true&amp;characterEncoding=utf8mb4</property>
+        <property name="jdbcUrl">jdbc:mysql://localhost:3306/wfchat?useSSL=false&amp;serverTimezone=GMT%2B8&amp;allowPublicKeyRetrieval=true&amp;useUnicode=true&amp;characterEncoding=utf8</property>
         <!--MySQL数据库用户名-->
         <property name="user">root</property>
         <!--MySQL数据库密码-->
diff --git a/distribution/src/main/resources/c3p0-config.xml b/distribution/src/main/resources/c3p0-config.xml
index 00af9e2e..4fe7073d 100755
--- a/distribution/src/main/resources/c3p0-config.xml
+++ b/distribution/src/main/resources/c3p0-config.xml
@@ -15,7 +15,7 @@
         <!--MySQL数据库驱动程序-->
         <property name="driverClass">com.mysql.cj.jdbc.Driver</property>
         <!--MySQL数据库地址-->
-        <property name="jdbcUrl">jdbc:mysql://localhost:3306/wfchat?useSSL=false&amp;serverTimezone=GMT%2B8&amp;allowPublicKeyRetrieval=true&amp;useUnicode=true&amp;characterEncoding=utf8mb4</property>
+        <property name="jdbcUrl">jdbc:mysql://localhost:3306/wfchat?useSSL=false&amp;serverTimezone=GMT%2B8&amp;allowPublicKeyRetrieval=true&amp;useUnicode=true&amp;characterEncoding=utf8</property>
         <!--MySQL数据库用户名-->
         <property name="user">root</property>
         <!--MySQL数据库密码-->