diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d32dd98..6c65cee 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -25,7 +25,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v2
         with:
           submodules: recursive
 
diff --git a/.gitignore b/.gitignore
index 6f0b406..acc6710 100644
--- a/.gitignore
+++ b/.gitignore
@@ -68,9 +68,6 @@ xcuserdata/
 /cache/
 flattened.sol
 
-# Python
-/env/
-
 # ============================================================================ #
 # Application
 # ============================================================================ #