diff --git a/plugins/fediverse.py b/plugins/fediverse.py
index a62e34b..93b9060 100644
--- a/plugins/fediverse.py
+++ b/plugins/fediverse.py
@@ -219,6 +219,7 @@ def truecaptcha_solve(self, encoded_image):
             "apikey": truecaptcha_apikey,
             "data": encoded_image,
             "mode": "human",
+            "case": "lower"
         }
         response = requests.post(url=url, json=data)