diff --git a/dev.env.example b/dev.env.example
index 1e879ae..9897e7e 100644
--- a/dev.env.example
+++ b/dev.env.example
@@ -10,4 +10,5 @@ SERVER_ADDRESS = 0.0.0.0:8888
 
 TOKEN_SYMMETRIC_KEY=
 TOKEN_DURATION = 1024h
+COOKIE_DURATION = # in seconds
 REFRESH_TOKEN_DURATION = 1024h
\ No newline at end of file