diff --git a/.docker/Dockerfile b/.docker/Dockerfile
index 3dd4b6b0c462d04218e913d683e88a26f1400189..14a4f121954591a255cbb32301f3bad748771f74 100644
--- a/.docker/Dockerfile
+++ b/.docker/Dockerfile
@@ -9,7 +9,6 @@ RUN apt-get update && \
     tox \
     -y
 COPY .docker/wait-for-it.sh /wait-for-it.sh
-ARG PYLIB=dev
 ADD https://gitlab.indiscale.com/api/v4/projects/97/repository/commits/${PYLIB} \
     pylib_version.json
 RUN git clone https://gitlab.indiscale.com/caosdb/src/caosdb-pylib.git && \