diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 37770ad..e87471a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -45,7 +45,7 @@ jobs:
         
   slither:
     name: Slither Run
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3