diff --git a/Dockerfile b/Dockerfile
index 8337363..f7d7907 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -76,6 +76,7 @@
 
 RUN pip3 install pymodbus && \
     cd /home/ubuntu/catkin_ws/src/ZLAC8015D_python && \
+    python3 setup.py install && \
     usermod -a -G dialout $USER
 
 
diff --git a/src/ZLAC8015D_python/zlac8015d/ZLAC8015D.py b/src/ZLAC8015D_python/zlac8015d/ZLAC8015D.py
index 787c593..45541fe 100644
--- a/src/ZLAC8015D_python/zlac8015d/ZLAC8015D.py
+++ b/src/ZLAC8015D_python/zlac8015d/ZLAC8015D.py
@@ -131,7 +131,8 @@
 		elif MODE == 2:
 			print("Set absolute position control")
 		elif MODE == 3:
-			print("Set speed rpm control")
+			dummy = 0
+			#print("Set speed rpm control")
 		else:
 			print("set_mode ERROR: set only 1, 2, or 3")
 			return 0