diff --git a/Dockerfile b/Dockerfile
index f5080a17f2cd50994c1eb849f0032ce5d871ce8a..45c5ac5820b5c1ca92abe7be975269c478160d70 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -33,7 +33,7 @@ RUN pip install --prefix="/install" --no-warn-script-location --ignore-installed
  && pip install --prefix="/install" --no-warn-script-location \
         --no-deps \
 	'synapse-simple-antispam @ git+https://github.com/maunium/synapse-simple-antispam' \
-	synapse-http-antispam \
+	'synapse-http-antispam @ git+https://github.com/maunium/synapse-http-antispam' \
 	'shared_secret_authenticator @ git+https://github.com/devture/matrix-synapse-shared-secret-auth@2.0.3' \
  && pip install --prefix="/install" --no-warn-script-location \
         --no-deps /synapse