diff --git a/Dockerfile b/Dockerfile
index 50cef323c..3c224a786 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -22,6 +22,7 @@ COPY README.rst pyproject.toml requirements.txt /synapse/
 RUN pip install --prefix="/install" --no-warn-script-location \
         --no-deps -r /synapse/requirements.txt \
  && pip install --prefix="/install" --no-warn-script-location \
+        --no-deps \
 	'git+https://github.com/maunium/synapse-simple-antispam#egg=synapse-simple-antispam' \
 	'git+https://github.com/devture/matrix-synapse-shared-secret-auth@2.0.2#egg=shared_secret_authenticator' \
  && pip install --prefix="/install" --no-warn-script-location \