diff --git a/ReleaseNotes.md b/ReleaseNotes.md
index f7126ef6..429e1a35 100644
--- a/ReleaseNotes.md
+++ b/ReleaseNotes.md
@@ -16,6 +16,7 @@ This is a minor release.
 ### 🐛 Fixed Issues
 
 ### ✨ Merged pull requests
+* [#290](https://github.com/pmd/pmd-eclipse-plugin/pull/290): chore: Add pmd-css - [Andreas Dangel](https://github.com/adangel) (@adangel)
 
 ### 📦 Dependency updates
 
diff --git a/net.sourceforge.pmd.eclipse.plugin/META-INF/MANIFEST.MF b/net.sourceforge.pmd.eclipse.plugin/META-INF/MANIFEST.MF
index 9bf13988..f036ad57 100644
--- a/net.sourceforge.pmd.eclipse.plugin/META-INF/MANIFEST.MF
+++ b/net.sourceforge.pmd.eclipse.plugin/META-INF/MANIFEST.MF
@@ -85,6 +85,7 @@ Bundle-ClassPath: .,
  target/lib/net.sourceforge.pmd.pmd-coco.jar,
  target/lib/net.sourceforge.pmd.pmd-cpp.jar,
  target/lib/net.sourceforge.pmd.pmd-cs.jar,
+ target/lib/net.sourceforge.pmd.pmd-css.jar,
  target/lib/net.sourceforge.pmd.pmd-dart.jar,
  target/lib/net.sourceforge.pmd.pmd-fortran.jar,
  target/lib/net.sourceforge.pmd.pmd-gherkin.jar,
diff --git a/net.sourceforge.pmd.eclipse.plugin/build.properties b/net.sourceforge.pmd.eclipse.plugin/build.properties
index 6079f6c3..4cf975ab 100644
--- a/net.sourceforge.pmd.eclipse.plugin/build.properties
+++ b/net.sourceforge.pmd.eclipse.plugin/build.properties
@@ -86,6 +86,7 @@ bin.includes = .,\
                target/lib/net.sourceforge.pmd.pmd-coco.jar,\
                target/lib/net.sourceforge.pmd.pmd-cpp.jar,\
                target/lib/net.sourceforge.pmd.pmd-cs.jar,\
+               target/lib/net.sourceforge.pmd.pmd-css.jar,\
                target/lib/net.sourceforge.pmd.pmd-dart.jar,\
                target/lib/net.sourceforge.pmd.pmd-fortran.jar,\
                target/lib/net.sourceforge.pmd.pmd-gherkin.jar,\