diff --git a/pkgs/servers/web-apps/mediawiki/default.nix b/pkgs/servers/web-apps/mediawiki/default.nix
index 5c39fc48ae6d..6a2a3116cf84 100644
--- a/pkgs/servers/web-apps/mediawiki/default.nix
+++ b/pkgs/servers/web-apps/mediawiki/default.nix
@@ -2,11 +2,11 @@
 
 stdenvNoCC.mkDerivation rec {
   pname = "mediawiki";
-  version = "1.39.3";
+  version = "1.40.0";
 
   src = fetchurl {
     url = "https://releases.wikimedia.org/mediawiki/${lib.versions.majorMinor version}/mediawiki-${version}.tar.gz";
-    hash = "sha256-41dpNDh2r0JJbaQ64vRyJPuMd5uPRXBcQUfG/zUizB0=";
+    hash = "sha256-6cSHdxhpjwgtgJbYqdFs2a6yHuGYKj2LRgOvfP0VitQ=";
   };
 
   postPatch = ''