diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 04ba17c90..4b08021a2 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -18,7 +18,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 18.17.0  # Test on minimum supported version
           cache: npm
 
       - run: npm ci
diff --git a/package.json b/package.json
index 31bc3562c..1f1431fce 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
     "url": "git+https://github.com/modelcontextprotocol/typescript-sdk.git"
   },
   "engines": {
-    "node": ">=18"
+    "node": ">=18.17.0"
   },
   "keywords": [
     "modelcontextprotocol",
diff --git a/src/shared/url-canparse.test.ts b/src/shared/url-canparse.test.ts
new file mode 100644
index 000000000..2075d0945
--- /dev/null
+++ b/src/shared/url-canparse.test.ts
@@ -0,0 +1,22 @@
+import { describe, it, expect } from '@jest/globals';
+
+describe('URL.canParse compatibility', () => {
+  it('should use URL.canParse which requires Node.js 18.17.0+', () => {
+    // This test will fail on Node.js < 18.17.0
+    expect(typeof URL.canParse).toBe('function');
+    
+    // Test that it works correctly
+    expect(URL.canParse('https://example.com')).toBe(true);
+    expect(URL.canParse('not-a-url')).toBe(false);
+  });
+
+  it('demonstrates the actual usage in our codebase', () => {
+    // This mimics how we use URL.canParse in auth.ts
+    const validateRedirectUri = (uri: string) => {
+      return URL.canParse(uri);
+    };
+
+    expect(validateRedirectUri('https://example.com/callback')).toBe(true);
+    expect(validateRedirectUri('invalid://[not-valid')).toBe(false);
+  });
+});
\ No newline at end of file