diff --git a/src/fetcher.ts b/src/fetcher.ts
index 80a4415b..be2d377d 100644
--- a/src/fetcher.ts
+++ b/src/fetcher.ts
@@ -98,7 +98,7 @@ function mergeRequestInit(
 ): RequestInit {
   const headers = new Headers(first?.headers)
   const other = new Headers(second?.headers)
-
+  
   for (const key of other.keys()) {
     const value = other.get(key)
     if (value != null) {
@@ -113,7 +113,7 @@ function getFetchParams(request: Request) {
 
   const path = getPath(request.path, payload)
   const query = getQuery(request.method, payload, request.queryParams)
-  const headers = getHeaders(request.init?.headers)
+  const headers = sendBody(request.method) ? getHeaders(request.init?.headers): new Headers(request.init?.headers)
   const url = request.baseUrl + path + query
 
   const init = {
diff --git a/test/fetch.test.ts b/test/fetch.test.ts
index 6fb17038..f8494552 100644
--- a/test/fetch.test.ts
+++ b/test/fetch.test.ts
@@ -23,7 +23,11 @@ describe('fetch', () => {
   })
 
   const expectedHeaders = {
-    authorization: 'Bearer token',
+    authorization: 'Bearer token'
+  }
+
+  const expectedHeadersWithBody = {
+    ...expectedHeaders,
     'content-type': 'application/json',
     accept: 'application/json',
   }
@@ -60,7 +64,7 @@ describe('fetch', () => {
       expect(data.params).toEqual({ id: '1' })
       expect(data.body).toEqual({ list: ['b', 'c'] })
       expect(data.query).toEqual({})
-      expect(data.headers).toEqual(expectedHeaders)
+      expect(data.headers).toEqual(expectedHeadersWithBody)
     })
   })
 
@@ -80,7 +84,7 @@ describe('fetch', () => {
       expect(data.params).toEqual({ id: '1' })
       expect(data.body).toEqual({ list: ['b', 'c'] })
       expect(data.query).toEqual({ scalar: 'a' })
-      expect(data.headers).toEqual(expectedHeaders)
+      expect(data.headers).toEqual(expectedHeadersWithBody)
     })
   })