diff --git a/.gitignore b/.gitignore
index dfb05801..68d638f9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,3 +26,4 @@ depclean-maven-plugin/depclean-maven-plugin.iml
 depclean-maven-plugin/target/generated-sources/
 depclean-maven-plugin/target/generated-test-sources/
 depclean-parent-pom.iml
+/.java-version
diff --git a/depclean-core/pom.xml b/depclean-core/pom.xml
index fa5b2187..31406d19 100644
--- a/depclean-core/pom.xml
+++ b/depclean-core/pom.xml
@@ -80,7 +80,7 @@
     <dependency>
       <groupId>org.ow2.asm</groupId>
       <artifactId>asm</artifactId>
-      <version>7.1</version>
+      <version>9.1</version>
     </dependency>
     <!-- Maven dependencies -->
     <dependency>
diff --git a/depclean-maven-plugin/src/test/resources/MavenInvokerResources/basic_spring_maven_project/tree_expected.txt b/depclean-maven-plugin/src/test/resources/MavenInvokerResources/basic_spring_maven_project/tree_expected.txt
index e6ea3964..98aad83f 100644
--- a/depclean-maven-plugin/src/test/resources/MavenInvokerResources/basic_spring_maven_project/tree_expected.txt
+++ b/depclean-maven-plugin/src/test/resources/MavenInvokerResources/basic_spring_maven_project/tree_expected.txt
@@ -1,6 +1,6 @@
 se.kth.castor:depclean-maven-plugin:maven-plugin:2.0.2-SNAPSHOT
 +- se.kth.castor:depclean-core:jar:2.0.2-SNAPSHOT:compile
-|  +- org.ow2.asm:asm:jar:7.1:compile
+|  +- org.ow2.asm:asm:jar:9.1:compile
 |  +- org.codehaus.plexus:plexus-component-annotations:jar:2.0.0:compile
 |  +- org.codehaus.plexus:plexus-utils:jar:3.3.0:compile
 |  +- (org.apache.maven:maven-core:jar:3.6.2:compile - omitted for conflict with 3.6.0)