diff --git a/_service b/_service
index 377ac59..b23b9dc 100644
--- a/_service
+++ b/_service
@@ -2,7 +2,7 @@
   <service name="obs_scm" mode="manual">
     <param name="scm">git</param>
     <param name="url">https://gn.googlesource.com/gn.git</param>
-    <param name="revision">97b68a0bb62b7528bc3491c7949d6804223c2b82</param>
+    <param name="revision">64d35867ca0a1088f13de8f4ccaf1a5687d7f1ce</param>
     <param name="versionformat">0.%cd</param>
     <param name="changesgenerate">enable</param>
   </service>
diff --git a/_servicedata b/_servicedata
index 056f202..1ce757c 100644
--- a/_servicedata
+++ b/_servicedata
@@ -1,4 +1,4 @@
 <servicedata>
 <service name="tar_scm">
                 <param name="url">https://gn.googlesource.com/gn.git</param>
-              <param name="changesrevision">97b68a0bb62b7528bc3491c7949d6804223c2b82</param></service></servicedata>
\ No newline at end of file
+              <param name="changesrevision">64d35867ca0a1088f13de8f4ccaf1a5687d7f1ce</param></service></servicedata>
diff --git a/gn-0.20250619.obscpio b/gn-0.20250619.obscpio
deleted file mode 100644
index 046bc4e..0000000
--- a/gn-0.20250619.obscpio
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:87696ee7afd32d5aef69ea6e4813517d6a4fb587e787a5ddf99c5b80cd7fbc88
-size 5343757
diff --git a/gn-0.20251217.obscpio b/gn-0.20251217.obscpio
new file mode 100644
index 0000000..53c25d0
--- /dev/null
+++ b/gn-0.20251217.obscpio
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:7e9eecb34097bf374302842e7b7552ce4f1fe389933592b9f9b6d3e43bcb88eb
+size 5407245
diff --git a/gn.changes b/gn.changes
index e380649..58793ed 100644
--- a/gn.changes
+++ b/gn.changes
@@ -1,3 +1,69 @@
+-------------------------------------------------------------------
+Fri Dec 26 12:08:53 UTC 2025 - Ruediger Oertel <ro@suse.com>
+
+- Update to version 0.20251217:
+  * Fix sha2 on big endian
+  * [Windows] Reduce the number of worker threads on many-core machines
+  * Add a sha256 hash implementation and use it for string_hash
+  * Opt-in to the Windows SegmentHeap
+  * Add a `module_name` flag to source_set.
+  * Refactor module name to be dynamic.
+  * Optimize vector creation in compile_commands_writer.cc.
+  * Run 'tools/run_formatter.sh'
+  * Implement `string_hash` function.
+  * Support weak_libraries
+  * Do not add .inputdeps paths to --ninja-outputs-file
+  * Make clang modules output -fmodule-file=foo=<pcm>.
+  * infra: Revert CIPD autoconf
+  * infra: Include autoconf bin directory to PATH
+  * infra: Fix autoconf executable path
+  * infra: Use CIPD autoconf
+  * Allow led access in GN via http://go/ciba
+  * Revert "Build non-linkable deps async with Ninja's validaitons"
+  * Upgrade linux bots from ubuntu 22.04 to ubuntu 24.04
+  * Use unordered_map instead of map in HeaderChecker
+  * Add --file_relation to gn refs command
+  * Optimize vector initialization and preallocation in desc_builder.cc.
+  * Add `reserve` statement when vector size is known beforehand.
+  * Refactor container update by preferring the range insert.
+  * Handle symlinked directories correctly during gn clean on Windows.
+  * Fix relative imports from args.gn.
+
+-------------------------------------------------------------------
+Fri Oct  3 07:58:10 UTC 2025 - Andreas Stieger <andreas.stieger@gmx.de>
+
+- Update to version 0.20250918:
+  * update reference.md
+  * Include -fmodule-file flags in compile_commands.json
+  * Refactor C++ module dependency logic into a new utility
+  * Gitiles navigation bar
+  * Adds a len() function
+  * Avoid clashes of include_dir in rust-project.json.
+  * Check all targets to find duplicated outputs.
+  * infra/config: Remove luci.recipes.use_python3 experiment
+  * Handle empty outputs in WriteInputDepsStampOrPhonyAndGetDep
+  * build: Propagate module dependencies through group targets
+  * Deduplicate item in 'deps', 'sources' and related lists
+  * infra: Update comment for macOS version used in CQ/CI
+  * [Apple] Allow passing a manifest to the post-processing script
+  * Update link to buganizer in README.md
+  * [Apple] Fix `gn gen` when using swift and no_stamp_files
+  * [Apple] Remove deprecated aliases for `post_processing_$var`
+  * Revert "Allow newline in string literal"
+  * Use std::ranges::all_of in parse_tree_unittest
+  * infra: Correctly use macOS 13 instead of 11
+  * Update Xcode and macOS version in bots
+  * infra: Add shadow buckets to trigger led job
+  * Allow newline in string literal
+  * Revert "Update macOS version to 13 used in CQ/CI"
+  * Update macOS version to 13 used in CQ/CI
+  * Refactor command_format.cc
+  * Shorten targets from //path/to/foo:foo to //path/to/foo
+  * Modernize and improve parse_tree.cc
+  * Auto-format the codebase
+  * Remove hardcoded -fmodules-embed-all-files flag
+  * Reland "Use JSON escaping for JSON string output"
+
 -------------------------------------------------------------------
 Tue Jul 01 14:40:37 UTC 2025 - Ruediger Oertel <ro@suse.com>
 
diff --git a/gn.obsinfo b/gn.obsinfo
index 7f322c5..202d124 100644
--- a/gn.obsinfo
+++ b/gn.obsinfo
@@ -1,4 +1,4 @@
 name: gn
-version: 0.20250619
-mtime: 1750335966
-commit: 97b68a0bb62b7528bc3491c7949d6804223c2b82
+version: 0.20251217
+mtime: 1765966586
+commit: 64d35867ca0a1088f13de8f4ccaf1a5687d7f1ce
diff --git a/gn.spec b/gn.spec
index 83acc54..40fe3db 100644
--- a/gn.spec
+++ b/gn.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package gn
 #
-# Copyright (c) 2025 SUSE LLC
+# Copyright (c) 2025 SUSE LLC and contributors
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -17,7 +17,7 @@
 
 
 Name:           gn
-Version:        0.20250619
+Version:        0.20251217
 Release:        0
 Summary:        A meta-build system that generates build files for Ninja
 License:        BSD-3-Clause