diff --git a/Dockerfile b/Dockerfile
index 2bd9610..dcdc85e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -82,6 +82,7 @@
     pymodbus && \
     python3 -m pip install --upgrade pip && \
     python3 -m pip install --upgrade Pillow && \
+    pip install ruamel.yaml && \
     cd /home/ubuntu/catkin_ws/src/ZLAC8015D_python && \
     python3 setup.py install && \
     usermod -a -G dialout $USER