diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 8376c6c..626c103 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,15 +11,15 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803 # v6
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v4
+        uses: pnpm/action-setup@b906affcce14559ad1aafd4ab0e942779e9f58b1 # v4
         with:
           version: 10.8.0
 
       - name: Setup Node.js
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@249970729cb0ef3589644e2896645e5dc5ba9c38 # v6
         with:
           node-version: '20'
           cache: 'pnpm'
@@ -34,4 +34,3 @@ jobs:
         env:
           PERPLEXITY_API_KEY: test-api-key
         run: pnpm test
-
diff --git a/src/tools/perplexity-search.ts b/src/tools/perplexity-search.ts
index fb045a7..dca10ca 100644
--- a/src/tools/perplexity-search.ts
+++ b/src/tools/perplexity-search.ts
@@ -1,5 +1,6 @@
 import { tool } from "ai";
 import { z } from "zod";
+import packageJson from "../../package.json";
 import type { PerplexitySearchConfig, PerplexitySearchResponse } from "../types";
 
 export function perplexitySearch(config: PerplexitySearchConfig = {}) {
@@ -77,6 +78,7 @@ export function perplexitySearch(config: PerplexitySearchConfig = {}) {
           headers: {
             'Content-Type': 'application/json',
             'Authorization': `Bearer ${apiKey}`,
+            'X-Pplx-Integration': `perplexity-ai-sdk/${packageJson.version}`,
           },
           body: JSON.stringify(requestBody),
         });