diff --git a/supysonic/api/extensions.py b/supysonic/api/extensions.py
index 4b1f505..ee2c307 100644
--- a/supysonic/api/extensions.py
+++ b/supysonic/api/extensions.py
@@ -13,4 +13,5 @@ from . import api_routing
 
 @api_routing("/getOpenSubsonicExtensions")
 def extensions():
-    return request.formatter("openSubsonicExtensions", [])
+    extensions = [{"name": "formPost", "versions": [1]}]
+    return request.formatter("openSubsonicExtensions", extensions)
diff --git a/supysonic/api/formatters.py b/supysonic/api/formatters.py
index 7ac5073..5d90609 100644
--- a/supysonic/api/formatters.py
+++ b/supysonic/api/formatters.py
@@ -32,7 +32,7 @@ class BaseFormatter:
 class JSONBaseFormatter(BaseFormatter):
     def __remove_empty_lists(self, d):
         if not isinstance(d, dict):
-            raise TypeError("Expecting a dict got " + type(d).__name__)
+            return d
 
         keys_to_remove = []
         for key, value in d.items():