diff --git a/pom.xml b/pom.xml
index 851ea53..8ab3f20 100644
--- a/pom.xml
+++ b/pom.xml
@@ -130,13 +130,13 @@
         <dependency>
             <groupId>org.junit.jupiter</groupId>
             <artifactId>junit-jupiter</artifactId>
-            <version>${junit.version}</version>
+            <version>5.4.2</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.mockito</groupId>
             <artifactId>mockito-inline</artifactId>
-            <version>${mockito.version}</version>
+            <version>3.3.3</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
@@ -146,17 +146,17 @@
             <dependency>
                 <groupId>io.esastack</groupId>
                 <artifactId>commons</artifactId>
-                <version>${esa-commons.version}</version>
+                <version>0.2.1</version>
             </dependency>
             <dependency>
                 <groupId>io.esastack</groupId>
                 <artifactId>commons-net-core</artifactId>
-                <version>${esa-commons-net.version}</version>
+                <version>0.0.1</version>
             </dependency>
             <dependency>
                 <groupId>io.esastack</groupId>
                 <artifactId>commons-net-netty</artifactId>
-                <version>${esa-commons-net.version}</version>
+                <version>0.0.1</version>
             </dependency>
             <dependency>
                 <groupId>io.netty</groupId>
@@ -168,23 +168,23 @@
             <dependency>
                 <groupId>io.netty</groupId>
                 <artifactId>netty-tcnative-boringssl-static</artifactId>
-                <version>${netty-tcnative.version}</version>
+                <version>2.0.34.Final</version>
             </dependency>
             <dependency>
                 <groupId>com.jcraft</groupId>
                 <artifactId>jzlib</artifactId>
-                <version>${jzlib.version}</version>
+                <version>1.1.3</version>
             </dependency>
             <dependency>
                 <groupId>org.junit.jupiter</groupId>
                 <artifactId>junit-jupiter</artifactId>
-                <version>${junit.version}</version>
+                <version>5.4.2</version>
                 <scope>test</scope>
             </dependency>
             <dependency>
                 <groupId>org.mockito</groupId>
                 <artifactId>mockito-inline</artifactId>
-                <version>${mockito.version}</version>
+                <version>3.3.3</version>
                 <scope>test</scope>
             </dependency>
         </dependencies>