diff --git a/pom.xml b/pom.xml
index ce92d8b..f227e4a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -61,7 +61,7 @@
         <dependency>
             <groupId>org.jenkins-ci.plugins</groupId>
             <artifactId>gitlab-plugin</artifactId>
-            <version>1.4.5</version>
+            <version>1.5.3</version>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins</groupId>
@@ -118,7 +118,6 @@
             <groupId>org.jenkins-ci.plugins.workflow</groupId>
             <artifactId>workflow-scm-step</artifactId>
             <version>2.4</version>
-            <scope>test</scope>
         </dependency>
 
         <!-- by default 1.4 is installed which causes an StackOverflowError -->
@@ -269,4 +268,4 @@
         </plugins>
     </build>
 
-</project>
\ No newline at end of file
+</project>
diff --git a/src/main/java/argelbargel/jenkins/plugins/gitlab_branch_source/SourceActions.java b/src/main/java/argelbargel/jenkins/plugins/gitlab_branch_source/SourceActions.java
index d00f705..31d33fa 100644
--- a/src/main/java/argelbargel/jenkins/plugins/gitlab_branch_source/SourceActions.java
+++ b/src/main/java/argelbargel/jenkins/plugins/gitlab_branch_source/SourceActions.java
@@ -76,7 +76,7 @@ private List<Action> retrieve(@Nonnull GitLabSCMHead head, @CheckForNull SCMHead
             linkAction = GitLabLinkAction.toMergeRequest(mr.getWebUrl());
             if (acceptMergeRequest(head)) {
                 boolean removeSourceBranch = mr.getRemoveSourceBranch() || removeSourceBranch(head);
-                actions.add(new GitLabSCMAcceptMergeRequestAction(mr.getProjectId(), mr.getId(), mr.getIid(), source.getSourceSettings().getMergeCommitMessage(), removeSourceBranch));
+                actions.add(new GitLabSCMAcceptMergeRequestAction(mr, mr.getIid(), source.getSourceSettings().getMergeCommitMessage(), removeSourceBranch));
             }
         } else {
             linkAction = (head instanceof TagSCMHead) ? GitLabLinkAction.toTag(source.getProject(), head.getName()) : GitLabLinkAction.toBranch(source.getProject(), head.getName());
diff --git a/src/main/java/argelbargel/jenkins/plugins/gitlab_branch_source/actions/GitLabSCMAcceptMergeRequestAction.java b/src/main/java/argelbargel/jenkins/plugins/gitlab_branch_source/actions/GitLabSCMAcceptMergeRequestAction.java
index a45a763..fb9655e 100644
--- a/src/main/java/argelbargel/jenkins/plugins/gitlab_branch_source/actions/GitLabSCMAcceptMergeRequestAction.java
+++ b/src/main/java/argelbargel/jenkins/plugins/gitlab_branch_source/actions/GitLabSCMAcceptMergeRequestAction.java
@@ -2,7 +2,9 @@
 
 
 import com.dabsquared.gitlabjenkins.connection.GitLabConnectionProperty;
-import com.dabsquared.gitlabjenkins.gitlab.api.GitLabApi;
+import com.dabsquared.gitlabjenkins.gitlab.api.GitLabClient;
+import argelbargel.jenkins.plugins.gitlab_branch_source.api.GitLabMergeRequest;
+import com.dabsquared.gitlabjenkins.gitlab.api.model.MergeRequest;
 import hudson.model.InvisibleAction;
 import hudson.model.Run;
 import hudson.model.TaskListener;
@@ -17,27 +19,30 @@
 public final class GitLabSCMAcceptMergeRequestAction extends InvisibleAction implements Serializable {
     private static final Logger LOGGER = Logger.getLogger(GitLabSCMAcceptMergeRequestAction.class.getName());
 
-    private final int projectId;
-    private final int mergeRequestId;
+    private final int mergeRequestID;
+    private final int mergeRequestPID;
     private final int mergeRequestScopedId;
     private final String commitMessage;
     private final boolean removeSourceBranch;
 
-    public GitLabSCMAcceptMergeRequestAction(int projectId, int mergeRequestId, int mergeRequestScopedId, String commitMessage, boolean removeSourceBranch) {
-        this.projectId = projectId;
-        this.mergeRequestId = mergeRequestId;
+    public GitLabSCMAcceptMergeRequestAction(GitLabMergeRequest MR, int mergeRequestScopedId, String commitMessage, boolean removeSourceBranch) {
+        this.mergeRequestPID = MR.getProjectId();
+        this.mergeRequestID = MR.getId();
         this.mergeRequestScopedId = mergeRequestScopedId;
         this.commitMessage = commitMessage;
         this.removeSourceBranch = removeSourceBranch;
     }
 
     public void acceptMergeRequest(Run<?, ?> build, TaskListener listener) {
-        GitLabApi client = GitLabConnectionProperty.getClient(build);
+        MergeRequest mergeRequest = new MergeRequest();
+        mergeRequest.setProjectId(mergeRequestPID);
+        mergeRequest.setId(mergeRequestID);
+        GitLabClient client = GitLabConnectionProperty.getClient(build);
         if (client == null) {
             listener.getLogger().format("cannot publish build-status pending as no gitlab-connection is configured!");
         } else {
             try {
-                client.acceptMergeRequest(projectId, mergeRequestId, MessageFormat.format(commitMessage, mergeRequestScopedId, build.getFullDisplayName()), removeSourceBranch);
+                client.acceptMergeRequest(mergeRequest, MessageFormat.format(commitMessage, mergeRequestScopedId, build.getFullDisplayName()), removeSourceBranch);
             } catch (Exception e) {
                 listener.getLogger().format("failed to accept merge-request: " + e.getMessage());
                 LOGGER.log(SEVERE, "failed to accept merge-request", e);
diff --git a/src/main/java/argelbargel/jenkins/plugins/gitlab_branch_source/actions/GitLabSCMBuildStatusPublisher.java b/src/main/java/argelbargel/jenkins/plugins/gitlab_branch_source/actions/GitLabSCMBuildStatusPublisher.java
index bebf18a..9eeaf1d 100644
--- a/src/main/java/argelbargel/jenkins/plugins/gitlab_branch_source/actions/GitLabSCMBuildStatusPublisher.java
+++ b/src/main/java/argelbargel/jenkins/plugins/gitlab_branch_source/actions/GitLabSCMBuildStatusPublisher.java
@@ -2,7 +2,7 @@
 
 
 import com.dabsquared.gitlabjenkins.connection.GitLabConnectionConfig;
-import com.dabsquared.gitlabjenkins.gitlab.api.GitLabApi;
+import com.dabsquared.gitlabjenkins.gitlab.api.GitLabClient;
 import com.dabsquared.gitlabjenkins.gitlab.api.model.BuildState;
 import hudson.init.Terminator;
 import hudson.model.Run;
@@ -86,7 +86,7 @@ private Message(String connectionName, Run<?, ?> run, int projectId, String hash
 
         @Override
         public void run() {
-            GitLabApi client = getClient(connectionName);
+            GitLabClient client = getClient(connectionName);
             if (client == null) {
                 LOGGER.log(WARNING, "cannot publish build-status pending as no gitlab-connection is configured!");
             } else {
@@ -98,7 +98,7 @@ public void run() {
             }
         }
 
-        private GitLabApi getClient(String connectionName) {
+        private GitLabClient getClient(String connectionName) {
             GitLabConnectionConfig config = (GitLabConnectionConfig) Jenkins.getInstance().getDescriptor(GitLabConnectionConfig.class);
             return config != null ? config.getClient(connectionName) : null;
         }