diff --git a/pom.xml b/pom.xml
index 625b7da..563988d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
 
     <groupId>com.github.jtendermint</groupId>
     <artifactId>jabci</artifactId>
-    <version>0.24.0</version>
+    <version>0.26.0</version>
 
     <name>com.github.jtendermint:jabci</name>
     <description>Java implementation for ABCI consensus protocol from tendermint.com and related tools</description>
@@ -136,7 +136,7 @@
         <dependency>
             <groupId>com.google.protobuf</groupId>
             <artifactId>protobuf-java</artifactId>
-            <version>3.5.1</version>
+            <version>3.6.1</version>
         </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
@@ -144,9 +144,9 @@
             <version>1.7.25</version>
         </dependency>
         <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <version>5.3.1</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
diff --git a/src/main/java/com/github/jtendermint/jabci/socket/TSocket.java b/src/main/java/com/github/jtendermint/jabci/socket/TSocket.java
index be6a455..7c44e57 100644
--- a/src/main/java/com/github/jtendermint/jabci/socket/TSocket.java
+++ b/src/main/java/com/github/jtendermint/jabci/socket/TSocket.java
@@ -101,7 +101,7 @@ public class TSocket extends ASocket {
     /**
      * Start listening on the specified port
      *
-     * @param portNumber
+     * @param portNumber tendermint abci port
      */
     public void start(final int portNumber) {
         this.start(portNumber, DEFAULT_LISTEN_SOCKET_TIMEOUT);
diff --git a/src/test/java/com/github/jtendermint/jabci/socket/SocketListenerTest.java b/src/test/java/com/github/jtendermint/jabci/socket/SocketListenerTest.java
index 1d14765..788fb09 100644
--- a/src/test/java/com/github/jtendermint/jabci/socket/SocketListenerTest.java
+++ b/src/test/java/com/github/jtendermint/jabci/socket/SocketListenerTest.java
@@ -23,12 +23,12 @@
  */
 package com.github.jtendermint.jabci.socket;
 
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import java.io.IOException;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 import com.github.jtendermint.jabci.api.ABCIAPI;
 import com.github.jtendermint.jabci.api.CodeType;