diff --git a/compose.yml b/compose.yml
index 7a949a0..1046a4d 100644
--- a/compose.yml
+++ b/compose.yml
@@ -4,7 +4,7 @@ version: "3.8"
 services:
 
   app:
-    image: fung.uy/mycosystems/liberaforms:v4.8.1
+    image: fung.uy/mycosystems/liberaforms:v4.8.1@sha256:6aa37bdb6e5291bf3dd83928f57b9767ae3ce6cfb581d8ba66aaf281eb562be0
     configs:
       - source: entrypoint
         mode: 555