diff --git a/lib/request.ts b/lib/request.ts
index 86c377b..b26efd0 100644
--- a/lib/request.ts
+++ b/lib/request.ts
@@ -54,7 +54,7 @@ export class OctonoRequest extends Request {
     E extends keyof Endpoints,
     P extends OctonoRequestInit = E extends keyof Endpoints
       ? Endpoints[E]["parameters"] & OctonoRequestInit
-      : OctonoRequestInit
+      : OctonoRequestInit,
   >(endpoint: E, params?: P): OctonoRequest {
     const baseURL = params?.baseURL ? params.baseURL : GITHUB_URL;
 
@@ -77,6 +77,10 @@ export class OctonoRequest extends Request {
       },
     };
 
+    if (method !== Method.GET) {
+      init.body = JSON.stringify(params || {});
+    }
+
     return new OctonoRequest(url.toString(), init);
   }
 }