diff --git a/.github/workflows/docker-localnet.yml b/.github/workflows/docker-localnet.yml
index c2afccae66..37e82460ff 100644
--- a/.github/workflows/docker-localnet.yml
+++ b/.github/workflows/docker-localnet.yml
@@ -57,6 +57,10 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
+      - name: Patch non-fast-block node
+        run: |
+          sed -i 's|7 \* 24 \* 60 \* 60 / 12 // 7 days|5 // Only 5 blocks for tests|' runtime/src/lib.rs
+
       - name: Build and push Docker image
         uses: docker/build-push-action@v6
         with:
diff --git a/runtime/src/lib.rs b/runtime/src/lib.rs
index 5f41341546..4c257129aa 100644
--- a/runtime/src/lib.rs
+++ b/runtime/src/lib.rs
@@ -208,7 +208,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
     //   `spec_version`, and `authoring_version` are the same between Wasm and native.
     // This value is set to 100 to notify Polkadot-JS App (https://polkadot.js.org/apps) to use
     //   the compatible custom types.
-    spec_version: 265,
+    spec_version: 266,
     impl_version: 1,
     apis: RUNTIME_API_VERSIONS,
     transaction_version: 1,