diff --git a/librespot/core.py b/librespot/core.py
index eb67bdd..ac1443e 100644
--- a/librespot/core.py
+++ b/librespot/core.py
@@ -112,7 +112,7 @@ class ApiClient(Closeable):
             url = url + suffix
 
         if headers is None:
-            headers = {}
+            headers = CaseInsensitiveDict()
         headers["Authorization"] = "Bearer {}".format(
             self.__session.tokens().get("playlist-read"))
         headers["client-token"] = self.__client_token_str