diff --git a/.github/workflows/flatpak-nightly.yml b/.github/workflows/flatpak-nightly.yml
index a72012d4..7acdbc99 100644
--- a/.github/workflows/flatpak-nightly.yml
+++ b/.github/workflows/flatpak-nightly.yml
@@ -29,6 +29,6 @@ jobs:
       name: "Build"
       with:
         bundle: com.github.rafostar.Clapper.flatpak
-        manifest-path: pkgs/flatpak/com.github.rafostar.Clapper-testing.json
+        manifest-path: pkgs/flatpak/com.github.rafostar.Clapper-nightly.json
         cache-key: flatpak-builder-${{ github.sha }}-testing-${{ github.run_number }}
         arch: ${{ matrix.arch }}
diff --git a/pkgs/flatpak/com.github.rafostar.Clapper-testing.json b/pkgs/flatpak/com.github.rafostar.Clapper-nightly.json
similarity index 98%
rename from pkgs/flatpak/com.github.rafostar.Clapper-testing.json
rename to pkgs/flatpak/com.github.rafostar.Clapper-nightly.json
index 9424ac3b..53b88543 100644
--- a/pkgs/flatpak/com.github.rafostar.Clapper-testing.json
+++ b/pkgs/flatpak/com.github.rafostar.Clapper-nightly.json
@@ -1,7 +1,7 @@
 {
     "app-id": "com.github.rafostar.Clapper",
     "runtime": "org.gnome.Platform",
-    "runtime-version": "40",
+    "runtime-version": "master",
     "sdk": "org.gnome.Sdk",
     "command": "com.github.rafostar.Clapper",
     "finish-args": [