diff --git a/pom.xml b/pom.xml
index ceffec5..e1db17f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -25,34 +25,34 @@
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-core</artifactId>
-            <version>${spring.version}</version>
+            <version>4.3.20.RELEASE</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-beans</artifactId>
-            <version>${spring.version}</version>
+            <version>5.2.22.RELEASE</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-context</artifactId>
-            <version>${spring.version}</version>
+            <version>5.3.39</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-jdbc</artifactId>
-            <version>${spring.version}</version>
+            <version>5.2.22.RELEASE</version>
         </dependency>
 
         <!-- MyBatis -->
         <dependency>
             <groupId>org.mybatis</groupId>
             <artifactId>mybatis</artifactId>
-            <version>3.2.3</version>
+            <version>3.5.6</version>
         </dependency>
         <dependency>
             <groupId>org.mybatis</groupId>
             <artifactId>mybatis-spring</artifactId>
-            <version>1.2.4</version>
+            <version>3.0.5</version>
         </dependency>
 
         <!-- Apache Commons -->
@@ -71,37 +71,37 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.1.3</version>
+            <version>1.3.15</version>
         </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-api</artifactId>
-            <version>${slf4j-version}</version>
+            <version>1.7.7</version>
         </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>log4j-over-slf4j</artifactId>
-            <version>${slf4j-version}</version>
+            <version>1.7.7</version>
         </dependency>
 
         <!-- Test. Scope test only -->
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.10</version>
+            <version>4.13.1</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-test</artifactId>
-            <version>${spring.version}</version>
+            <version>4.3.20.RELEASE</version>
             <scope>test</scope>
         </dependency>
 
         <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>
-            <version>5.1.18</version>
+            <version>8.0.31</version>
             <scope>test</scope>
         </dependency>