diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c2d75f3..95eadab 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -25,7 +25,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: oven-sh/setup-bun@v2
         with:
-          bun-version: 1.3.14
+          bun-version: 1.4.4
       - uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node }}
@@ -66,7 +66,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: oven-sh/setup-bun@v2
         with:
-          bun-version: 1.3.14
+          bun-version: 1.4.4
       - uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node }}
@@ -93,7 +93,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: oven-sh/setup-bun@v2
         with:
-          bun-version: 1.3.14
+          bun-version: 1.4.4
       - uses: actions/setup-node@v4
         with:
           node-version: 24
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 845ecfc..8256503 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -23,7 +23,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: oven-sh/setup-bun@v2
         with:
-          bun-version: 1.3.14
+          bun-version: 1.4.4
       - uses: actions/setup-node@v4
         with:
           node-version: 22
diff --git a/AGENTS.md b/AGENTS.md
index 8a542f4..ecfcef4 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -61,7 +61,7 @@ wiki/             as-built docs: architecture, decisions, conventions, credits,
 scripts/          cross-workspace tooling (sync-site.mjs)
 ```
 
-One `bun install` at the root covers everything (bun 1.3.14 + turbo).
+One `bun install` at the root covers everything (bun 1.4.4 + turbo).
 
 ## Knowledge layer: plans/ and wiki/
 
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 8b6544b..4e685b4 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -7,7 +7,7 @@ binds humans too).
 ## Setup
 
 ```sh
-# Bun 1.3.14 (Node >= 18 is the library's runtime target)
+# Bun 1.4.4 (Node >= 18 is the library's runtime target)
 bun install
 bun run check
 ```
diff --git a/apps/site/vercel.json b/apps/site/vercel.json
new file mode 100644
index 0000000..801cb8b
--- /dev/null
+++ b/apps/site/vercel.json
@@ -0,0 +1,5 @@
+{
+  "$schema": "https://openapi.vercel.sh/vercel.json",
+  "installCommand": "cd ../.. && npx -y bun@1.4.4 install --frozen-lockfile",
+  "buildCommand": "cd ../.. && npx -y bun@1.4.4 run build --filter=lingo-site"
+}
diff --git a/package.json b/package.json
index 916f6f2..e900aad 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "lingo-monorepo",
   "private": true,
-  "packageManager": "bun@1.3.14",
+  "packageManager": "bun@1.4.4",
   "workspaces": [
     "packages/*",
     "apps/*"