diff --git a/pom.xml b/pom.xml
index 42d97dc..6a854f9 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
         <groupId>org.jenkins-ci.plugins</groupId>
         <artifactId>plugin</artifactId>
         <!-- Which version of Jenkins is this plugin built against? -->
-        <version>1.565</version>
+        <version>1.642.4</version>
     </parent>
 
     <groupId>com.lookout.jenkins</groupId>
@@ -79,8 +79,13 @@
         <dependency>
             <groupId>org.jenkins-ci.plugins</groupId>
             <artifactId>matrix-project</artifactId>
-            <version>1.4</version>
+            <version>1.6</version>
         </dependency>
+        <dependency>
+            <groupId>com.github.mjdetullio.jenkins.plugins</groupId>
+            <artifactId>multi-branch-project-plugin</artifactId>
+            <version>0.5.1</version>
+         </dependency>
         <!-- Test Dependencies -->
         <dependency>
             <groupId>junit</groupId>
diff --git a/src/main/java/com/lookout/jenkins/EnvironmentScript.java b/src/main/java/com/lookout/jenkins/EnvironmentScript.java
index 7d47c19..19ae7e1 100644
--- a/src/main/java/com/lookout/jenkins/EnvironmentScript.java
+++ b/src/main/java/com/lookout/jenkins/EnvironmentScript.java
@@ -35,6 +35,8 @@
 import org.kohsuke.stapler.DataBoundConstructor;
 import org.kohsuke.stapler.StaplerRequest;
 
+import com.github.mjdetullio.jenkins.plugins.multibranch.MatrixMultiBranchProject;
+
 import com.lookout.jenkins.commands.Commands;
 import com.lookout.jenkins.commands.PowerShell;
 import com.lookout.jenkins.commands.Shebangs;
@@ -228,7 +230,7 @@ public String[] buildCommandLine(FilePath scriptFile) {
     }
 
     /**
-     * Create an aggregator that will calculate the environment once iff onlyRunOnParent is true.
+     * Create an aggregator that will calculate the environment once if onlyRunOnParent is true.
      *
      * The aggregator we return is called on the parent job for matrix jobs. In it we generate the environment once and
      * persist it in an Action (of type {@link PersistedEnvironment}) if the job has onlyRunOnParent enabled. The
@@ -287,7 +289,11 @@ public boolean isApplicable(AbstractProject<?, ?> project) {
         }
 
         public boolean isMatrix(StaplerRequest request) {
-            return (request.findAncestorObject(AbstractProject.class) instanceof MatrixProject);
+            if (request.findAncestorObject(MatrixMultiBranchProject.class) != null ||
+                request.findAncestorObject(MatrixProject.class) != null) {
+                return Boolean.TRUE;
+            }
+            return Boolean.FALSE;
         }
     }
 }