diff --git a/default.nix b/default.nix
index 08ba9bd..5ce837a 100644
--- a/default.nix
+++ b/default.nix
@@ -10,8 +10,8 @@ let
   revealjs = fetchFromGitHub {
     owner = "hakimel";
     repo = "reveal.js";
-    rev = "3.8.0";
-    sha256 = "14cva2hxdv4gxpz2a996qs8xhxffw97a90gkz2mmgdczh1kyn1sc";
+    rev = "3.9.2";
+    sha256 = "1xaqgrib3m8ijnphph3aiz6d98w2mm1hlz643dargd12h4kx1lll";
   };
 
 in derivation {