diff --git a/packages/@aws-cdk/aws-lambda-python/lib/Dockerfile b/packages/@aws-cdk/aws-lambda-python/lib/Dockerfile
index 8cc21cb2bab92..e1874a8f7a1e2 100644
--- a/packages/@aws-cdk/aws-lambda-python/lib/Dockerfile
+++ b/packages/@aws-cdk/aws-lambda-python/lib/Dockerfile
@@ -14,6 +14,6 @@ RUN pip install --upgrade pip
 # poetry>=1.2 cannot use MD5 hashes for installing packages, which is the only hashes
 # AWS Code Artifact supports.
 # https://github.com/python-poetry/poetry/issues/6301
-RUN pip install pipenv==2022.4.8 poetry<1.2
+RUN pip install pipenv==2022.4.8 "poetry<1.2"
 
 CMD [ "python" ]