diff --git a/build.gradle b/build.gradle
index 511fe3c720e937d29ae4dc1bb3c2d4eb0dcfea94..855ccb7ec28ff40b59296cd72261dfac72e1abbc 100644
--- a/build.gradle
+++ b/build.gradle
@@ -93,7 +93,7 @@ dependencies {
     implementation 'org.easytesting:fest-assert:1.4'
     implementation 'org.codehaus.jackson:jackson-mapper-asl:1.9.+'
     implementation(group: "com.github.fge", name: "json-schema-validator", version: "2.2.+")
-    implementation(group: "com.google.code.gson", name: "gson", version: "+")
+    implementation(group: "com.google.code.gson", name: "gson", version: "2.10")
     implementation(group: "io.rest-assured", name: "rest-assured", version: "4.+")
     implementation(group: "com.jayway.jsonpath", name: "json-path", version: "+")
     implementation group: 'org.apache.logging.log4j', name: 'log4j-api', version: '+'
diff --git a/src/test/java/api/test/rest/ocm/connection/ConnectionStepDefinitions.java b/src/test/java/api/test/rest/ocm/connection/ConnectionStepDefinitions.java
index d14b7fa06f073afa6ad247980fc316f6e3910fd2..975ae9221d4c1af811ef7f90fc343c092939c2e2 100644
--- a/src/test/java/api/test/rest/ocm/connection/ConnectionStepDefinitions.java
+++ b/src/test/java/api/test/rest/ocm/connection/ConnectionStepDefinitions.java
@@ -20,29 +20,11 @@ package api.test.rest.ocm.connection;
 import api.test.core.BaseStepDefinitions;
 import api.test.rest.RestSessionContainer;
 import api.test.rest.pojo.connection.Connection;
-import api.test.rest.pojo.credentialDef.CredentialDef;
-import com.github.fge.jackson.JsonLoader;
-import com.google.gson.*;
-import com.jayway.jsonpath.Configuration;
-import com.jayway.jsonpath.JsonPath;
-import com.jayway.jsonpath.Option;
-import com.jayway.jsonpath.ReadContext;
 import core.*;
-import cucumber.api.java.en.And;
 import cucumber.api.java.en.Given;
-import cucumber.api.java.en.Then;
-import exceptions.RAFException;
-import org.apache.commons.lang3.RandomStringUtils;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
-
-import java.security.KeyPair;
 import java.util.HashMap;
-import java.util.Map;
-
-import static org.junit.Assert.assertEquals;
-import static utils.RsaGenerator.encrypt;
-import static utils.RsaGenerator.generateKeyPair;
 
 public class ConnectionStepDefinitions extends BaseStepDefinitions {
     private static final Logger logger = LogManager.getLogger(ConnectionStepDefinitions.class.getSimpleName());
diff --git a/src/test/java/api/test/rest/ocm/proof/ProofStepDefinitions.java b/src/test/java/api/test/rest/ocm/proof/ProofStepDefinitions.java
index 0c1a12fb0220719006adc2ad02b8f1a8f92c04b8..bee6454b7c40aa173d25fe9739af5f18a13d7b62 100644
--- a/src/test/java/api/test/rest/ocm/proof/ProofStepDefinitions.java
+++ b/src/test/java/api/test/rest/ocm/proof/ProofStepDefinitions.java
@@ -24,7 +24,6 @@ import com.google.gson.*;
 import com.jayway.jsonpath.JsonPath;
 import core.*;
 import cucumber.api.java.en.Given;
-import net.minidev.json.writer.JsonReader;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;