diff --git a/subgen/docker-compose.yml b/subgen/docker-compose.yml
index e30331d..d7da790 100644
--- a/subgen/docker-compose.yml
+++ b/subgen/docker-compose.yml
@@ -1,6 +1,6 @@
 services:
   subgen:
-    image: mccloud/subgen:cpu
+    image: mccloud/subgen:cpu@sha256:153984207dd5c4856c25c79f2c7bf26393340b67b9c091a0b640367106c796cc
     container_name: subgen
     volumes:
       - ${DATADIR}/subgen/models:/subgen/models