diff --git a/pkgs/development/compilers/swi-prolog/default.nix b/pkgs/development/compilers/swi-prolog/default.nix
index 4517a25b7444..62d0a2b188e3 100644
--- a/pkgs/development/compilers/swi-prolog/default.nix
+++ b/pkgs/development/compilers/swi-prolog/default.nix
@@ -35,7 +35,6 @@
   libyaml,
 
   withGui ? false,
-  libX11,
   libXpm,
   libXext,
   libXft,
@@ -80,7 +79,7 @@
 
 let
   # minorVersion is even for stable, odd for unstable
-  version = "9.2.7";
+  version = "9.2.9";
 
   # This package provides several with* options, which replaces the old extraLibraries option.
   # This error should help users that still use this option find their way to these flags.
@@ -127,8 +126,8 @@ stdenv.mkDerivation {
   src = fetchFromGitHub {
     owner = "SWI-Prolog";
     repo = "swipl";
-    rev = "V${version}";
-    hash = "sha256-O9ogltcbBST111FA85jEVW6jGOLJSt/5PeBABtMu2Ws=";
+    tag = "V${version}";
+    hash = "sha256-M0stUwiD3Auz5OsmgVJFWg2RAswu42UUp8bafqZOC7A=";
     fetchSubmodules = true;
   };