diff --git a/pom.xml b/pom.xml
index 8aa9405..c075c78 100644
--- a/pom.xml
+++ b/pom.xml
@@ -75,23 +75,23 @@
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
-            <version>${guava.version}</version>
+            <version>32.0.1-jre</version>
         </dependency>
         <dependency>
             <groupId>com.github.phantomthief</groupId>
             <artifactId>more-lambdas</artifactId>
-            <version>${more-lambdas.version}</version>
+            <version>0.1.50</version>
         </dependency>
         <dependency>
             <groupId>io.netty</groupId>
             <artifactId>netty-common</artifactId>
-            <version>${netty-common.version}</version>
+            <version>4.1.118.Final</version>
             <optional>true</optional>
         </dependency>
         <dependency>
             <groupId>com.google.code.findbugs</groupId>
             <artifactId>jsr305</artifactId>
-            <version>${jsr305.version}</version>
+            <version>3.0.2</version>
             <optional>true</optional><!-- needed only for annotations -->
         </dependency>
 
@@ -108,19 +108,19 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>${logback-classic.version}</version>
+            <version>5.7.2</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.openjdk.jmh</groupId>
             <artifactId>jmh-core</artifactId>
-            <version>${jmh.version}</version>
+            <version>1.23</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.openjdk.jmh</groupId>
             <artifactId>jmh-generator-annprocess</artifactId>
-            <version>${jmh.version}</version>
+            <version>1.23</version>
             <scope>test</scope>
         </dependency>
     </dependencies>