diff --git a/docker/Dockerfile_ubuntu_18.04 b/docker/Dockerfile_ubuntu_18.04
index 7064545da37783beab236a567aaab94a36349ee7..3d9445b6b57cc65c47b0110bb32b02a2b1fc5576 100644
--- a/docker/Dockerfile_ubuntu_18.04
+++ b/docker/Dockerfile_ubuntu_18.04
@@ -15,10 +15,8 @@ RUN apt-get update && \
         python3-pytest-cov \
         python3-nose \
         python3-pip \
-        python3-sphinx \
         python3-numpydoc \
         python3-matplotlib \
-        python3-sphinx-gallery \
         python3-pil \
         libhdf5-dev \
         git \