diff --git a/Dockerfile b/Dockerfile
index dcdc85e..3ffede1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -79,7 +79,8 @@
 
 RUN pip3 install --upgrade --no-cache-dir pip && \
     pip3 install --no-cache-dir \
-    pymodbus && \
+    pymodbus \
+    numpy-quaternion && \
     python3 -m pip install --upgrade pip && \
     python3 -m pip install --upgrade Pillow && \
     pip install ruamel.yaml && \