diff --git a/core/Dockerfile.dev b/core/Dockerfile.dev
index 7e9673f..6bcbc02 100644
--- a/core/Dockerfile.dev
+++ b/core/Dockerfile.dev
@@ -11,8 +11,8 @@ RUN apk update \
     && apk add --virtual build-deps gcc python3-dev musl-dev postgresql-dev git \
     && apk add bash su-exec postgresql-client mysql-client \
     && pip install -U psycopg2 \
-                      git+https://gitlab.com/mailman/mailman.git?ref=master \
-                      git+https://gitlab.com/mailman/mailman-hyperkitty.git?ref=master \
+                      git+https://gitlab.com/mailman/mailman.git \
+                      git+https://gitlab.com/mailman/mailman-hyperkitty.git \
                       pymysql \
     && apk del build-deps \
     && adduser -S mailman
diff --git a/web/Dockerfile.dev b/web/Dockerfile.dev
index 29c9b05..26e1f22 100644
--- a/web/Dockerfile.dev
+++ b/web/Dockerfile.dev
@@ -15,10 +15,10 @@ RUN set -ex \
 	   	postgresql-dev mariadb-dev \
 	&& apk add --no-cache --virtual .mailman-rundeps bash sassc \
 	   postgresql-client mysql-client py-mysqldb \
-	&& pip install -U git+https://gitlab.com/mailman/mailmanclient?ref=master \
-		git+https://gitlab.com/mailman/postorius?ref=master \
-		git+https://gitlab.com/mailman/hyperkitty?ref=master \
-		git+https://gitlab.com/mailman/django-mailman3?ref=master \
+	&& pip install -U git+https://gitlab.com/mailman/mailmanclient \
+		git+https://gitlab.com/mailman/postorius \
+		git+https://gitlab.com/mailman/hyperkitty \
+		git+https://gitlab.com/mailman/django-mailman3 \
 		whoosh \
 		uwsgi \
 		psycopg2 \