diff --git a/Jenkinsfile b/Jenkinsfile
index a229fa51..39b42fc8 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -1 +1 @@
-buildPlugin()
+buildPlugin(useAci: true)
diff --git a/pom.xml b/pom.xml
index c74d8a28..6fd80937 100644
--- a/pom.xml
+++ b/pom.xml
@@ -28,7 +28,7 @@ THE SOFTWARE.
     <parent>
         <groupId>org.jenkins-ci.plugins</groupId>
         <artifactId>plugin</artifactId>
-        <version>3.54</version>
+        <version>4.4</version>
         <relativePath />
     </parent>
     <groupId>org.jenkins-ci.plugins.workflow</groupId>
@@ -66,127 +66,111 @@ THE SOFTWARE.
         <revision>2.22</revision>
         <changelist>-SNAPSHOT</changelist>
         <java.level>8</java.level>
-        <jenkins.version>2.138.4</jenkins.version>
-        <scm-api.version>2.6.3</scm-api.version>
+        <jenkins.version>2.176.4</jenkins.version>
         <no-test-jar>false</no-test-jar>
-        <workflow-step-api.version>2.13</workflow-step-api.version>
-        <workflow-support.version>2.17</workflow-support.version>
-        <workflow-cps.version>2.53</workflow-cps.version>
-        <git-plugin.version>3.9.1</git-plugin.version>
+        <workflow-job-plugin.version>2.39</workflow-job-plugin.version> <!-- TODO: Remove after https://github.com/jenkinsci/bom/pull/264 is released. -->
         <subversion-plugin.version>2.13.0</subversion-plugin.version>
     </properties>
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>io.jenkins.tools.bom</groupId>
+                <artifactId>bom-2.176.x</artifactId>
+                <version>11</version>
+                <scope>import</scope>
+                <type>pom</type>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
     <dependencies>
         <dependency>
             <groupId>org.jenkins-ci.plugins.workflow</groupId>
             <artifactId>workflow-step-api</artifactId>
-            <version>${workflow-step-api.version}</version>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins.workflow</groupId>
             <artifactId>workflow-job</artifactId>
-            <version>2.21</version>
+            <version>${workflow-job-plugin.version}</version>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins.workflow</groupId>
             <artifactId>workflow-support</artifactId>
-            <version>${workflow-support.version}</version>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins</groupId>
             <artifactId>structs</artifactId>
-            <version>1.17</version>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins.workflow</groupId>
             <artifactId>workflow-cps</artifactId>
-            <version>${workflow-cps.version}</version>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins</groupId>
             <artifactId>scm-api</artifactId>
-            <version>${scm-api.version}</version>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins</groupId>
             <artifactId>branch-api</artifactId>
-            <version>2.0.21</version>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins</groupId>
             <artifactId>cloudbees-folder</artifactId>
-            <version>6.1.2</version>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins.workflow</groupId>
             <artifactId>workflow-api</artifactId>
-            <version>2.27</version>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins.workflow</groupId>
             <artifactId>workflow-scm-step</artifactId>
-            <version>2.7</version>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins</groupId>
             <artifactId>script-security</artifactId>
-            <version>1.42</version>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins</groupId>
             <artifactId>scm-api</artifactId>
-            <version>${scm-api.version}</version>
             <classifier>tests</classifier>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins.workflow</groupId>
             <artifactId>workflow-basic-steps</artifactId>
-            <version>2.3</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins.workflow</groupId>
             <artifactId>workflow-durable-task-step</artifactId>
-            <version>2.5</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins.workflow</groupId>
             <artifactId>workflow-cps-global-lib</artifactId>
-            <version>2.4</version>
+            <version>2.17</version> <!-- TODO: Remove after https://github.com/jenkinsci/bom/pull/278 is released. -->
             <scope>test</scope>
-            <exclusions>
-                <exclusion>
-                    <groupId>org.jenkins-ci.plugins</groupId>
-                    <artifactId>git-client</artifactId>
-                </exclusion>
-            </exclusions>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins.workflow</groupId>
             <artifactId>workflow-step-api</artifactId>
-            <version>${workflow-step-api.version}</version>
             <classifier>tests</classifier>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins.workflow</groupId>
             <artifactId>workflow-support</artifactId>
-            <version>${workflow-support.version}</version>
             <classifier>tests</classifier>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins.workflow</groupId>
             <artifactId>workflow-cps</artifactId>
-            <version>${workflow-cps.version}</version>
             <classifier>tests</classifier>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins</groupId>
             <artifactId>git</artifactId>
-            <version>${git-plugin.version}</version>
             <scope>test</scope>
             <exclusions>
                 <exclusion>
@@ -208,7 +192,6 @@ THE SOFTWARE.
         <dependency>
             <groupId>org.jenkins-ci.plugins</groupId>
             <artifactId>git</artifactId>
-            <version>${git-plugin.version}</version>
             <classifier>tests</classifier>
             <scope>test</scope>
             <exclusions>
@@ -238,7 +221,7 @@ THE SOFTWARE.
         <dependency>
             <groupId>org.jenkins-ci.plugins.workflow</groupId>
             <artifactId>workflow-job</artifactId>
-            <version>2.20</version>
+            <version>${workflow-job-plugin.version}</version>
             <classifier>tests</classifier>
             <scope>test</scope>
         </dependency>
@@ -248,40 +231,19 @@ THE SOFTWARE.
             <version>2.2</version>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>org.jenkins-ci.modules</groupId>
-            <artifactId>sshd</artifactId>
-            <version>2.4</version>
-            <scope>test</scope><!-- from git-server via workflow-cps-global-lib and otherwise unavailable during tests -->
-        </dependency>
-        <dependency>
-            <groupId>org.jenkins-ci.modules</groupId>
-            <artifactId>instance-identity</artifactId>
-            <version>2.2</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.jenkins-ci.modules</groupId>
-            <artifactId>ssh-cli-auth</artifactId>
-            <version>1.4</version>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins</groupId>
             <artifactId>credentials</artifactId>
-            <version>2.1.16</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins</groupId>
             <artifactId>mailer</artifactId>
-            <version>1.18</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.jenkins-ci.plugins</groupId>
             <artifactId>junit</artifactId>
-            <version>1.6</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
diff --git a/src/main/java/org/jenkinsci/plugins/workflow/multibranch/SCMVar.java b/src/main/java/org/jenkinsci/plugins/workflow/multibranch/SCMVar.java
index e359f52e..7f365d82 100644
--- a/src/main/java/org/jenkinsci/plugins/workflow/multibranch/SCMVar.java
+++ b/src/main/java/org/jenkinsci/plugins/workflow/multibranch/SCMVar.java
@@ -97,7 +97,7 @@
         } else {
             SCMHead head = branch.getHead();
             FlowExecutionOwner owner = ((WorkflowRun) build).asFlowExecutionOwner();
-            TaskListener listener = owner != null ? owner.getListener() : TaskListener.NULL;
+            TaskListener listener = owner.getListener();
             tip = scmSource.fetch(head, listener);
             if (tip == null) {
                 throw new AbortException("Could not determine exact tip revision of " + branch.getName());
diff --git a/src/test/java/org/jenkinsci/plugins/workflow/multibranch/JobPropertyStepTest.java b/src/test/java/org/jenkinsci/plugins/workflow/multibranch/JobPropertyStepTest.java
index eef3c0d3..cbbce7b6 100644
--- a/src/test/java/org/jenkinsci/plugins/workflow/multibranch/JobPropertyStepTest.java
+++ b/src/test/java/org/jenkinsci/plugins/workflow/multibranch/JobPropertyStepTest.java
@@ -253,8 +253,10 @@ public void testChoiceParameterSnippetizer() throws Exception {
         r.waitUntilNoActivity(); // #1 built automatically
         assertEquals(1, p.getBuilds().size());
         r.assertBuildStatusSuccess(p.scheduleBuild2(0)); // #2
+        Thread.sleep(500L); // WorkflowRun performs log rotation asynchronously.
         assertEquals(1, p.getBuilds().size());
         r.assertBuildStatusSuccess(p.scheduleBuild2(0)); // #3
+        Thread.sleep(500L); // WorkflowRun performs log rotation asynchronously.
         assertEquals(1, p.getBuilds().size());
         WorkflowRun b3 = p.getLastBuild();
         assertEquals(3, b3.getNumber());