diff --git a/pkgs/development/tools/analysis/include-what-you-use/default.nix b/pkgs/development/tools/analysis/include-what-you-use/default.nix
index dab9eb7504ab..8f713b8dca1c 100644
--- a/pkgs/development/tools/analysis/include-what-you-use/default.nix
+++ b/pkgs/development/tools/analysis/include-what-you-use/default.nix
@@ -9,12 +9,13 @@
 
 stdenv.mkDerivation rec {
   pname = "include-what-you-use";
-  # Also bump llvmPackages in all-packages.nix to the supported version!
-  version = "0.22";
+  # Make sure to bump `llvmPackages` in "pkgs/top-level/all-packages.nix" to the supported version:
+  # https://github.com/include-what-you-use/include-what-you-use?tab=readme-ov-file#clang-compatibility
+  version = "0.23";
 
   src = fetchurl {
     url = "${meta.homepage}/downloads/${pname}-${version}.src.tar.gz";
-    hash = "sha256-hZB0tGHqS4MlpzQYwgfKM7XmVmsI5rWH65FkQWVppt0=";
+    hash = "sha256-AATVqRaXF6zy9IEkilv8FcfVXdwrnNx/RhsG6T1Jxz8=";
   };
 
   postPatch = ''
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 3bd2b8752b7e..0c29393bed25 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -7931,7 +7931,7 @@ with pkgs;
   };
 
   include-what-you-use = callPackage ../development/tools/analysis/include-what-you-use {
-    llvmPackages = llvmPackages_18;
+    llvmPackages = llvmPackages_19;
   };
 
   inherit (callPackage ../applications/misc/inochi2d { })