diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 2baddb0..dc97975 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,4 @@
-image: quay.io/buildah/stable:latest
+image: quay.io/buildah/stable:latest@sha256:dd77a048ff8c565b75edd9b0faa83bb7356170c2c423f8c64b3ad80bfb208703
 
 variables:
   STORAGE_DRIVER: vfs