diff --git a/Dockerfile b/Dockerfile
index 4ad97cd..6de4e44 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -90,7 +90,8 @@
 
 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 && \