diff --git a/poethepoet/executor/poetry.py b/poethepoet/executor/poetry.py
index 5fc63b47..2ee43a3a 100644
--- a/poethepoet/executor/poetry.py
+++ b/poethepoet/executor/poetry.py
@@ -64,6 +64,7 @@ def _get_poetry_virtualenv(self, force: bool = True):
             # currently active
             clean_env = dict(environ)
             clean_env.pop("VIRTUAL_ENV", None)
+            clean_env["PYTHONIOENCODING"] = "utf-8"
 
             exec_cache["poetry_virtualenv"] = (
                 Popen(