diff --git a/src/FirebaseCloudMessaging.cpp b/src/FirebaseCloudMessaging.cpp
index b774fbeb..a2b7a63f 100644
--- a/src/FirebaseCloudMessaging.cpp
+++ b/src/FirebaseCloudMessaging.cpp
@@ -64,7 +64,7 @@ const FirebaseError FirebaseCloudMessaging::SendMessageToTopic(
 const FirebaseError FirebaseCloudMessaging::SendPayload(
     const char* payload) {
   std::unique_ptr<FirebaseHttpClient> client(FirebaseHttpClient::create());
-  client->begin("http://fcm.googleapis.com/fcm/send");
+  client->begin("https://fcm.googleapis.com/fcm/send");  
   client->addHeader("Authorization", auth_header_.c_str());
   client->addHeader("Content-Type", "application/json");