diff --git a/locust/docker-compose.yml b/locust/docker-compose.yml
index db14094..86a54d0 100644
--- a/locust/docker-compose.yml
+++ b/locust/docker-compose.yml
@@ -2,7 +2,7 @@ version: '3'
 
 services:
   master:
-    image: locustio/locust
+    image: locustio/locust@sha256:80486b5fe9cf3caecfa1f478c5c89b21f423fbce6ddf03bbd4c63e04d1c71873
     user: root
     ports:
       - "8089:8089"
@@ -24,7 +24,7 @@ services:
       - ENVIRONMENT=${ENVIRONMENT:-staging}
 
   worker:
-    image: locustio/locust
+    image: locustio/locust@sha256:80486b5fe9cf3caecfa1f478c5c89b21f423fbce6ddf03bbd4c63e04d1c71873
     user: root
     volumes:
       - ./:/mnt/locust