diff --git a/GEMINI.md b/GEMINI.md
index 94ed03c..65b1913 100644
--- a/GEMINI.md
+++ b/GEMINI.md
@@ -1,7 +1,7 @@
 # OilPriceAPI Grounding Instructions
 
 This extension connects the current Gemini CLI session to the read-only
-`oilpriceapi-mcp@3.3.0` tool inventory. In Gemini CLI, the tools appear with the
+`oilpriceapi-mcp@3.4.0` tool inventory. In Gemini CLI, the tools appear with the
 `mcp_oilpriceapi_` prefix.
 
 ## Ground Product Answers
diff --git a/README.md b/README.md
index 16d4a1b..e4d53e6 100644
--- a/README.md
+++ b/README.md
@@ -46,14 +46,14 @@ Show an energy market snapshot and identify unavailable fields.
 What does OilPriceAPI say about refresh cadence and data rights?
 ```
 
-The extension pins `oilpriceapi-mcp@3.3.0`, starts it with `--scope read`, and
+The extension pins `oilpriceapi-mcp@3.4.0`, starts it with `--scope read`, and
 sets a 15-second Gemini MCP request timeout. The default inventory exposes 25
 read tools and no create/delete tools. Inspect the exact executable inventory:
 
 ```bash
-npx -y oilpriceapi-mcp@3.3.0 --list-tools --json
-npx -y oilpriceapi-mcp@3.3.0 --capabilities --json
-npx -y oilpriceapi-mcp@3.3.0 doctor --demo
+npx -y oilpriceapi-mcp@3.4.0 --list-tools --json
+npx -y oilpriceapi-mcp@3.4.0 --capabilities --json
+npx -y oilpriceapi-mcp@3.4.0 doctor --demo
 ```
 
 Common tools include:
diff --git a/gemini-extension.json b/gemini-extension.json
index 38b8054..d9551d1 100644
--- a/gemini-extension.json
+++ b/gemini-extension.json
@@ -16,7 +16,7 @@
       "command": "npx",
       "args": [
         "-y",
-        "oilpriceapi-mcp@3.3.0",
+        "oilpriceapi-mcp@3.4.0",
         "--scope",
         "read",
         "--profile",
diff --git a/package-lock.json b/package-lock.json
index 6598ddf..9c4185d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,7 +10,7 @@
       "devDependencies": {
         "@google/gemini-cli": "0.49.0",
         "@modelcontextprotocol/sdk": "1.29.0",
-        "oilpriceapi-mcp": "3.3.0"
+        "oilpriceapi-mcp": "3.4.0"
       },
       "engines": {
         "node": ">=20.0.0"
@@ -1007,9 +1007,9 @@
       }
     },
     "node_modules/oilpriceapi-mcp": {
-      "version": "3.3.0",
-      "resolved": "https://registry.npmjs.org/oilpriceapi-mcp/-/oilpriceapi-mcp-3.3.0.tgz",
-      "integrity": "sha512-hd5ptGfl6GDTG41ayLj1fdnnQXiXdLMrRgfwIijaaXb1ziYv2ljFT8IaGVCfdycKcsS8OmXsi1kYHm89V6e1QQ==",
+      "version": "3.4.0",
+      "resolved": "https://registry.npmjs.org/oilpriceapi-mcp/-/oilpriceapi-mcp-3.4.0.tgz",
+      "integrity": "sha512-lQpC2ftAmUsIz2oAjeMBACOZbPL6i1dVxudpRJjhiNovN94+t3VXAvzUzw0FSOhX40Hx5uhTIbvGs9mDbc/CiA==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
diff --git a/package.json b/package.json
index 2cc4edb..feb570b 100644
--- a/package.json
+++ b/package.json
@@ -15,6 +15,6 @@
   "devDependencies": {
     "@google/gemini-cli": "0.49.0",
     "@modelcontextprotocol/sdk": "1.29.0",
-    "oilpriceapi-mcp": "3.3.0"
+    "oilpriceapi-mcp": "3.4.0"
   }
 }
diff --git a/tests/manifest.test.mjs b/tests/manifest.test.mjs
index 7f39c85..e41154b 100644
--- a/tests/manifest.test.mjs
+++ b/tests/manifest.test.mjs
@@ -23,7 +23,7 @@ test("manifest pins a bounded read-only MCP runtime", () => {
   assert.equal(server.command, "npx");
   assert.deepEqual(server.args, [
     "-y",
-    "oilpriceapi-mcp@3.3.0",
+    "oilpriceapi-mcp@3.4.0",
     "--scope",
     "read",
     "--profile",