diff --git a/.github/workflows/style_check.yml b/.github/workflows/style_check.yml
index 239a0280c..90459bc1c 100644
--- a/.github/workflows/style_check.yml
+++ b/.github/workflows/style_check.yml
@@ -29,8 +29,8 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-18.04, macos-latest]
-        python-version: [3.7, 3.9]
+        os: [ubuntu-latest]
+        python-version: [3.8]
       fail-fast: false
 
     steps:
diff --git a/requirements.txt b/requirements.txt
index 2e72d2eb6..258c64065 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,3 +8,4 @@ onnx
 onnxruntime
 --extra-index-url https://pypi.ngc.nvidia.com
 onnx_graphsurgeon
+dill