diff --git a/docker/Dockerfile b/docker/Dockerfile
index aed03b6..8fe7345 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -94,6 +94,7 @@ ARG USER
 ADD minicalosim /root/minicalosim
 
 RUN cd  /root/minicalosim && git checkout $COMMIT && \
+    git submodule update --init && \
     mkdir -p build && cd build && rm -rf * && cmake ../ && make -j4