diff --git a/docker/Dockerfile_ros-melodic b/docker/Dockerfile_ros-melodic
index 4714a4b..1444da5 100644
--- a/docker/Dockerfile_ros-melodic
+++ b/docker/Dockerfile_ros-melodic
@@ -43,12 +43,12 @@ RUN sh -c 'echo "deb http://packages.ros.org/ros/ubuntu `lsb_release -sc` main"
 
 # Install everything again for Python 2 because we could not get Firmware
 # to compile using catkin without it.
-RUN pip install wheel setuptools
+RUN pip install setuptools wheel
 # FIXME: regression in control>0.8.4 (used by px4tools) does not run on Python 2.
-RUN pip install argcomplete argparse catkin_pkg catkin-tools cerberus coverage \
-    empy==3.3.4 jinja2 matplotlib==2.2.* numpy pkgconfig control==0.8.4 px4tools pygments \
-    pymavlink packaging pyros-genmsg pyulog==0.8.0 pyyaml requests rosdep rospkg \
-    serial six toml jsonschema==2.6.0
+RUN pip install argcomplete argparse catkin_pkg catkin-tools cerberus==1.3.4 control==0.8.4 \
+    coverage empy==3.3.4 jinja2 jsonschema==2.6.0 matplotlib==2.2.* numpy packaging pkgconfig \
+    px4tools pygments pymavlink pyros-genmsg pyulog==0.8.0 pyyaml requests rosdep rospkg serial \
+    six toml transforms3d==0.3.1
 
 # bootstrap rosdep
 RUN rosdep init && rosdep update