diff --git a/unittests/docker/Dockerfile b/unittests/docker/Dockerfile
index 9b848cf69c829408f3f3edd599323b6b0321e041..4ed467a4bed7eba42d74bfbe62c5f6816a80b220 100644
--- a/unittests/docker/Dockerfile
+++ b/unittests/docker/Dockerfile
@@ -7,7 +7,7 @@ RUN apt-get update && \
     apt-get install -y \
       pylint3 python3-pip tox git \
       curl pycodestyle \
-      python3-sphinx
+      python3-sphinx python3-mypy
 ARG COMMIT="dev"
 # TODO Rename to linkahead
 RUN git clone -b dev https://gitlab.indiscale.com/caosdb/src/caosdb-pylib.git linkahead-pylib && \