diff --git a/flit.py b/flit.py
index 8ce51e2..0759168 100755
--- a/flit.py
+++ b/flit.py
@@ -140,7 +140,7 @@ def random_char():
         str: A single uppercase letter or number
 
     """
-    return random.choice(string.ascii_uppercase + string.digits)
+    return random.choice(string.ascii_lowercase + string.digits)
 
 
 def random_name():