diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 26ad383..ddc1e76 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -55,7 +55,7 @@ rust:nightly:
         - web
 
 flatpak:
-    image: registry.gitlab.gnome.org/gnome/gnome-nightly-oci/rust-bundle:latest
+    image: registry.gitlab.gnome.org/gnome/gnome-runtime-images/rust_bundle:3.28
     stage: test
     script:
         - flatpak-builder --stop-at=hammond app org.gnome.Hammond.json
diff --git a/org.gnome.Hammond.json b/org.gnome.Hammond.json
index 8c4729d..8e27d4f 100644
--- a/org.gnome.Hammond.json
+++ b/org.gnome.Hammond.json
@@ -1,7 +1,7 @@
 {
     "app-id" : "org.gnome.Hammond",
     "runtime" : "org.gnome.Platform",
-    "runtime-version" : "master",
+    "runtime-version" : "3.28",
     "sdk" : "org.gnome.Sdk",
     "sdk-extensions" : [
         "org.freedesktop.Sdk.Extension.rust-stable"