diff --git a/day03_04manytomany/pom.xml b/day03_04manytomany/pom.xml
index 0e86f91..0626808 100644
--- a/day03_04manytomany/pom.xml
+++ b/day03_04manytomany/pom.xml
@@ -22,7 +22,7 @@
         <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>
-            <version>5.1.37</version>
+            <version>8.0.28</version>
         </dependency>
 
         <!-- mybatis配置 -->
diff --git a/day03_05jndi/pom.xml b/day03_05jndi/pom.xml
index 9c82eb0..37b853a 100644
--- a/day03_05jndi/pom.xml
+++ b/day03_05jndi/pom.xml
@@ -31,7 +31,7 @@
         <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>
-            <version>5.1.37</version>
+            <version>8.0.28</version>
         </dependency>
 
         <!-- mybatis配置 -->
diff --git a/day04_01lazy/pom.xml b/day04_01lazy/pom.xml
index 4228a9e..52e2f83 100644
--- a/day04_01lazy/pom.xml
+++ b/day04_01lazy/pom.xml
@@ -18,7 +18,7 @@
         <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>
-            <version>5.1.37</version>
+            <version>8.0.28</version>
         </dependency>
 
         <!-- mybatis配置 -->