diff --git a/README.md b/README.md
index 62bd8e7..c7ead1d 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ To download your puzzle inputs (the inputs are different for each user),
 run `./main.py --fetch-session` and input your session key.
 The session key can be found by inspecting the headers of a HTTP request
 made from a browser on which the user is logged in. The HTTP request header
-in question has the following format : `Cookie : session-key`.
+in question has the following format : `Cookie : session=key`.
 
 For other options see `./main.py -h`.
 ```console