diff --git a/install/turn-things-off.sh b/install/turn-things-off.sh
index 270dc4e..9efbcdf 100644
--- a/install/turn-things-off.sh
+++ b/install/turn-things-off.sh
@@ -1,11 +1,15 @@
 echo "${_group}Turning things off ..."
 
 if [[ -n "$MINIMIZE_DOWNTIME" ]]; then
   # Stop everything but relay and nginx
   $dc rm -fsv $($dc config --services | grep -v -E '^(nginx|relay)$')
 else
   # Clean up old stuff and ensure nothing is working while we install/update
   $dc down -t $STOP_TIMEOUT --rmi local --remove-orphans
+
+  # Back-compat with old project name
+  COMPOSE_PROJECT_NAME=sentry_onpremise \
+    $dc down -t $STOP_TIMEOUT --rmi local --remove-orphans
 fi
 
 echo "${_endgroup}"