diff --git a/pom.xml b/pom.xml
index 5961722..75b134f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -49,37 +49,37 @@
         <dependency>
             <groupId>io.netty</groupId>
             <artifactId>netty-transport</artifactId>
-            <version>${netty.version}</version>
+            <version>4.1.118.Final</version>
         </dependency>
         <dependency>
             <groupId>io.netty</groupId>
             <artifactId>netty-handler</artifactId>
-            <version>${netty.version}</version>
+            <version>4.1.118.Final</version>
         </dependency>
         <dependency>
             <groupId>io.netty</groupId>
             <artifactId>netty-codec</artifactId>
-            <version>${netty.version}</version>
+            <version>4.1.118.Final</version>
         </dependency>
         <dependency>
             <groupId>io.netty</groupId>
             <artifactId>netty-codec-http</artifactId>
-            <version>${netty.version}</version>
+            <version>4.1.118.Final</version>
         </dependency>
         <dependency>
             <groupId>com.google.protobuf</groupId>
             <artifactId>protobuf-java</artifactId>
-            <version>${protobuf.version}</version>
+            <version>3.25.5</version>
         </dependency>
         <dependency>
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>
-            <version>${gson.version}</version>
+            <version>2.8.9</version>
         </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-api</artifactId>
-            <version>${slf4j.version}</version>
+            <version>1.7.36</version>
         </dependency>
         <dependency>
             <groupId>junit</groupId>
@@ -90,7 +90,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.4.7</version>
+            <version>1.5.13</version>
             <scope>test</scope>
         </dependency>
     </dependencies>