diff --git a/entrypoint.sh b/entrypoint.sh
index e5880ee..6b2cbc5 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -2,7 +2,7 @@
 set -e
 
 if [ "$1" != "/bin/sh" ]; then
-  python ./checkin.py $@
+  python -u ./checkin.py $@
 else
   exec "$@"
 fi