diff --git a/pom.xml b/pom.xml
index aea62e1c..ef0c1fd3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>org.jenkins-ci.plugins</groupId>
         <artifactId>plugin</artifactId>
-        <version>3.50</version>
+        <version>3.56</version>
         <relativePath />
     </parent>
 
@@ -50,7 +50,7 @@
         <changelist>-SNAPSHOT</changelist>
         <jenkins.version>2.176.4</jenkins.version>
         <java.level>8</java.level>
-        <jcasc.version>1.30</jcasc.version>
+        <jcasc.version>1.35</jcasc.version>
         <jgit.version>5.6.0.201912101111-r</jgit.version>
     </properties>
 
@@ -86,11 +86,6 @@
             <version>1.3.9</version>
             <optional>true</optional>
         </dependency>
-        <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
-            <scope>test</scope>
-        </dependency>
         <dependency>
             <groupId>org.assertj</groupId>
             <artifactId>assertj-core</artifactId>
@@ -110,11 +105,16 @@
             <scope>test</scope>
         </dependency>
         <dependency>
-            <groupId>io.jenkins</groupId>
-            <artifactId>configuration-as-code</artifactId>
+            <groupId>io.jenkins.configuration-as-code</groupId>
+            <artifactId>test-harness</artifactId>
             <version>${jcasc.version}</version>
-            <classifier>tests</classifier>
             <scope>test</scope>
+            <exclusions>
+                <exclusion>
+                    <groupId>com.fasterxml.jackson.core</groupId>
+                    <artifactId>jackson-databind</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
         <dependency>
             <groupId>org.eclipse.jgit</groupId>
@@ -132,7 +132,7 @@
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>
-            <version>3.7</version>
+            <version>3.9</version>
             <scope>test</scope>
         </dependency>
         <dependency>