diff --git a/config/runtime.exs b/config/runtime.exs
index 951308a..e6d2c8a 100644
--- a/config/runtime.exs
+++ b/config/runtime.exs
@@ -65,6 +65,10 @@ if config_env() == :prod do
     ],
     secret_key_base: secret_key_base
 
+  config :nanoid,
+    size: 21,
+    alphabet: "_-0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+
   # ## SSL Support
   #
   # To get SSL working, you will need to add the `https` key