diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index a25f3c9..11febfe 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -155,7 +155,7 @@ jobs:
                   workspace=$(jq -r '.name' packages/${{ matrix.dir }}/package.json)
                   yarn workspace "$workspace" run compile
 
-            - if: contains(needs.get-changed-files.outputs.modified_files, ${{ matrix.dir }})
+            - if: contains(needs.get-changed-files.outputs.modified_files, matrix.dir)
               name: Run slither
               uses: crytic/slither-action@v0.4.0
               id: slither