diff --git a/src/server.ts b/src/server.ts
index a0f34c9..987cd5b 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -55,7 +55,13 @@ const getRequestListener = (fetchCallback: FetchCallback) => {
       init['body'] = buffer
     }
 
-    const res = (await fetchCallback(new Request(url.toString(), init))) as Response
+    let res: Response
+
+    try {
+      res = (await fetchCallback(new Request(url.toString(), init))) as Response
+    } catch {
+      res = new Response(null, { status: 500 })
+    }
 
     const contentType = res.headers.get('content-type') || ''
 
diff --git a/test/server.test.ts b/test/server.test.ts
index a8f963b..e1e01dd 100644
--- a/test/server.test.ts
+++ b/test/server.test.ts
@@ -201,6 +201,11 @@ describe('Error handling', () => {
     expect(res.status).toBe(500)
     expect(res.text).toBe('Custom Error!')
   })
+
+  it('Should return 500 response - PURGE method', async () => {
+    const res = await request(server).purge('/')
+    expect(res.status).toBe(500)
+  })
 })
 
 describe('Basic Auth Middleware', () => {