diff --git a/LttPClient.py b/LttPClient.py
index a9c1d1c2..da9482e4 100644
--- a/LttPClient.py
+++ b/LttPClient.py
@@ -438,7 +438,8 @@ def launch_sni(ctx: Context):
         sni_path = Utils.local_path(sni_path)
     if os.path.isdir(sni_path):
         for file in os.listdir(sni_path):
-            if file.startswith("sni.") and not file.endswith(".proto"):
+            lower_file = file.lower()
+            if (lower_file.startswith("sni.") and not lower_file.endswith(".proto")) or lower_file == "sni":
                 sni_path = os.path.join(sni_path, file)
 
     if os.path.isfile(sni_path):