diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index d645cbc..2d834d0 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -30,7 +30,7 @@ jobs:
           cache-dependency-path: 'rascal-textmate-core/package-lock.json'
       - name: install-tokenizer
         working-directory: rascal-textmate-core
-        run: npm install vscode-tmgrammar-test
+        run: npm ci
       - name: run-tests
         working-directory: rascal-textmate-core
         run: mvn test -B -Drascal.compile.skip -Drascal.tutor.skip