diff --git a/docs/participate.md b/docs/participate.md
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--- a/docs/participate.md
+++ b/docs/participate.md
@@ -2,7 +2,7 @@
 
 ## Spontaneous contributions and projects
 
-For this year's camp, we are using [the hub](hub.html) (you might remember it from rC3) to list your self-organised sessions, and exchange information on a bulletin board and wiki. See [the dedicated hub info page](hub.html) for details.
+For this year's camp, we are using [the hub](hub.md) (you might remember it from rC3) to list your self-organised sessions, and exchange information on a bulletin board and wiki. See [the dedicated hub info page](hub.md) for details.
 
 ## Call for Angels