diff --git a/dnscms/Dockerfile b/dnscms/Dockerfile
index 2c4a619..fe0374e 100644
--- a/dnscms/Dockerfile
+++ b/dnscms/Dockerfile
@@ -29,7 +29,7 @@ RUN curl -sSL https://install.python-poetry.org | python3 -
 
 WORKDIR /app
 COPY pyproject.toml poetry.lock README.md /app/
-RUN pip install "gunicorn==20.0.4"
+RUN pip install gunicorn
 RUN poetry install --without=dev
 COPY . /app
 RUN chown wagtail:wagtail /app