diff --git a/packages/hono/src/index.ts b/packages/hono/src/index.ts
index 7bf4a25260..c1891eb313 100644
--- a/packages/hono/src/index.ts
+++ b/packages/hono/src/index.ts
@@ -55,10 +55,13 @@ function convertToStandardRequest(req: HonoRequest): Request {
     headers[key] = value;
   }
 
+  // https://developer.mozilla.org/en-US/docs/Web/API/fetch#body
+  const includeBody = ["GET", "HEAD"].includes(req.raw.method);
+
   return new Request(req.raw.url, {
     method: req.raw.method,
     headers,
-    body: req.raw.body,
+    body: includeBody ? req.raw.body : undefined,
     // @ts-ignore
     duplex: "half",
   });
diff --git a/packages/nextjs/src/index.ts b/packages/nextjs/src/index.ts
index ba5d811f1e..6d876e8fba 100644
--- a/packages/nextjs/src/index.ts
+++ b/packages/nextjs/src/index.ts
@@ -70,12 +70,15 @@ async function convertToStandardRequest(nextReq: NextApiRequest): Promise<Reques
     headers.set(key, value as string);
   });
 
+  // https://developer.mozilla.org/en-US/docs/Web/API/fetch#body
+  const includeBody = !!method && ["GET", "HEAD"].includes(method);
+
   // Create a new Request object (hardcode the url because it doesn't really matter what it is)
   const webReq = new Request("https://next.js/api/trigger", {
     headers,
     method,
     // @ts-ignore
-    body: nextReq,
+    body: includeBody ? nextReq : undefined,
     duplex: "half",
   });