diff --git a/.github/actions/build-release-assets/action.yml b/.github/actions/build-release-assets/action.yml
index 937bdcd..e4e08a0 100644
--- a/.github/actions/build-release-assets/action.yml
+++ b/.github/actions/build-release-assets/action.yml
@@ -5,7 +5,7 @@ inputs:
   bun-version:
     description: Bun version used to build the theme.
     required: false
-    default: "1.3.14"
+    default: "1.4.0"
 
 runs:
   using: composite
diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 9927940..f66f896 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -62,16 +62,14 @@ jobs:
 
       - uses: oven-sh/setup-bun@v2
         with:
-          bun-version: "1.3.14"
+          bun-version: "1.4.0"
 
       - uses: actions/cache@v6
         with:
-          path: |
-            node_modules
-            ~/.bun/install/cache
-          key: bun-${{ runner.os }}-${{ hashFiles('bun.lock') }}
+          path: ~/.bun/install/cache
+          key: bun-cache-v3-${{ runner.os }}-${{ hashFiles('package.json') }}
 
-      - run: bun install
+      - run: bun install --frozen-lockfile
 
       # - name: Lint
       #   if: matrix.check == 'eslint'
diff --git a/package.json b/package.json
index 1c5ba1c..091255e 100644
--- a/package.json
+++ b/package.json
@@ -54,7 +54,7 @@
     "typescript-eslint": "^8.63.0",
     "undici": "^7.28.0",
     "vite": "^8.1.4",
-    "vitest": "^4.1.10"
+    "vitest": "4.1.10"
   },
   "prettier": {
     "printWidth": 120,