diff --git a/jsk_rosbag_tools/requirements.in b/jsk_rosbag_tools/requirements.in
index b27d67343..13a15a5ce 100644
--- a/jsk_rosbag_tools/requirements.in
+++ b/jsk_rosbag_tools/requirements.in
@@ -1,3 +1,3 @@
 moviepy==1.0.3
-scipy
+scipy<1.9.0
 numpy