diff --git a/pom.xml b/pom.xml
index a0ef635a..26ac7f62 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>org.jenkins-ci.plugins</groupId>
     <artifactId>plugin</artifactId>
-    <version>4.7</version>
+    <version>4.31</version>
     <relativePath />
   </parent>
 
@@ -83,27 +83,18 @@
     <dependency>
       <groupId>com.github.spotbugs</groupId>
       <artifactId>spotbugs-annotations</artifactId>
-      <version>4.1.4</version>
-    </dependency>
-    <dependency>
-      <groupId>org.mockito</groupId>
-      <artifactId>mockito-core</artifactId>
-      <scope>test</scope>
-    </dependency>
-    <dependency>
-      <groupId>org.powermock</groupId>
-      <artifactId>powermock-module-junit4</artifactId>
-      <scope>test</scope>
+      <version>4.5.1</version>
+      <optional>true</optional>
       <exclusions>
         <exclusion>
-          <groupId>org.hamcrest</groupId>
-          <artifactId>hamcrest-core</artifactId>
+          <groupId>com.google.code.findbugs</groupId>
+          <artifactId>jsr305</artifactId>
         </exclusion>
       </exclusions>
     </dependency>
     <dependency>
-      <groupId>org.powermock</groupId>
-      <artifactId>powermock-api-mockito2</artifactId>
+      <groupId>org.mockito</groupId>
+      <artifactId>mockito-core</artifactId>
       <scope>test</scope>
     </dependency>
     <!-- For docker integration tests -->
diff --git a/src/test/java/hudson/plugins/active_directory/RemoveIrrelevantGroupsTest.java b/src/test/java/hudson/plugins/active_directory/RemoveIrrelevantGroupsTest.java
index 0cd93544..6fe2eaae 100644
--- a/src/test/java/hudson/plugins/active_directory/RemoveIrrelevantGroupsTest.java
+++ b/src/test/java/hudson/plugins/active_directory/RemoveIrrelevantGroupsTest.java
@@ -32,9 +32,6 @@
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.jvnet.hudson.test.JenkinsRule;
-import org.powermock.api.mockito.PowerMockito;
-import org.powermock.core.classloader.annotations.PowerMockIgnore;
-import org.powermock.modules.junit4.PowerMockRunner;
 
 import java.util.Arrays;
 import java.util.HashSet;
@@ -42,15 +39,14 @@
 
 import static org.junit.Assert.assertArrayEquals;
 import static org.junit.Assert.assertEquals;
-import static org.powermock.api.mockito.PowerMockito.when;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
 
 /**
  * Tests for the "Remove Irrelevant Groups" feature.
  *
  * @author Fredrik Persson &lt;fredrik6.persson@sonymobile.com&gt;
  */
-@RunWith(PowerMockRunner.class)
-@PowerMockIgnore({"javax.crypto.*", "javax.xml.*", "com.sun.*", "org.xml.*"})
 public class RemoveIrrelevantGroupsTest {
 
     @Rule
@@ -76,7 +72,7 @@ private void setUpJenkinsUsedGroups(String... groups) {
             usedGroups.add(group);
         }
 
-        AuthorizationStrategy authorizationStrategy = PowerMockito.mock(AuthorizationStrategy.class);
+        AuthorizationStrategy authorizationStrategy = mock(AuthorizationStrategy.class);
         when(authorizationStrategy.getGroups()).thenReturn(usedGroups);
         jenkinsRule.getInstance().setAuthorizationStrategy(authorizationStrategy);
     }