diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3cd35a10..84d632cf 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -41,7 +41,7 @@ jobs:
         python-version: ['3.8', '3.9', '3.10', '3.11']
         exclude: # TODO: remove this when pip is fixed
           - os: Windows
-            python-version: '3.11'
+            python-version: '3.8'
 
     runs-on: ${{ matrix.os }}-latest
     steps:
diff --git a/poethepoet/env/cache.py b/poethepoet/env/cache.py
index 0d3c1bee..15816048 100644
--- a/poethepoet/env/cache.py
+++ b/poethepoet/env/cache.py
@@ -27,7 +27,7 @@ def get(self, envfile_path_str: str) -> Dict[str, str]:
         envfile_path = self._project_dir.joinpath(Path(envfile_path_str).expanduser())
         if envfile_path.is_file():
             try:
-                with envfile_path.open() as envfile:
+                with envfile_path.open(encoding="utf-8") as envfile:
                     result = parse_env_file(envfile.readlines())
             except ValueError as error:
                 message = error.args[0]