diff --git a/fjerkroa_bot/ai_responder.py b/fjerkroa_bot/ai_responder.py
index 2f496ae..0cf44d2 100644
--- a/fjerkroa_bot/ai_responder.py
+++ b/fjerkroa_bot/ai_responder.py
@@ -47,7 +47,10 @@ def parse_maybe_json(json_string):
             concatenated_values.append(str(value))
         return '\n'.join(concatenated_values)
 
-    return str(parsed_json)
+    result = str(parsed_json)
+    if result.lower() in ('', 'none', 'null', '"none"', '"null"', "'none'", "'null'"):
+        return None
+    return result
 
 
 class AIMessageBase(object):