diff --git a/.github/workflows/semgrep.yml b/.github/workflows/semgrep.yml
deleted file mode 100644
index e69de29b..00000000
diff --git a/.github/workflows/snyk.yml b/.github/workflows/snyk.yml
index 17721020..41dfa814 100644
--- a/.github/workflows/snyk.yml
+++ b/.github/workflows/snyk.yml
@@ -24,6 +24,8 @@ jobs:
 
   check:
     name: Check for Vulnerabilities
+    # Repository secrets are unavailable to workflows from external forks.
+    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.fork == false
     runs-on: ubuntu-latest
 
     steps:
@@ -36,4 +38,4 @@ jobs:
 
       - uses: snyk/actions/gradle-jdk11@9adf32b1121593767fc3c057af55b55db032dc04 # pin@1.0.0
         env:
-          SNYK_TOKEN: ${{ secrets.SNYK_TOKEN }}
\ No newline at end of file
+          SNYK_TOKEN: ${{ secrets.SNYK_TOKEN }}