diff --git a/locust/docker-compose.yml b/locust/docker-compose.yml
index db14094..4787e04 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:d0bd7649b89fb2ee981e382d6e9ae2932d898110707943ecff0ef108569b6a5f
     user: root
     ports:
       - "8089:8089"
@@ -24,7 +24,7 @@ services:
       - ENVIRONMENT=${ENVIRONMENT:-staging}
 
   worker:
-    image: locustio/locust
+    image: locustio/locust@sha256:d0bd7649b89fb2ee981e382d6e9ae2932d898110707943ecff0ef108569b6a5f
     user: root
     volumes:
       - ./:/mnt/locust