diff --git a/DEPS b/DEPS
index cbd97caf023..3e42fd9b44d 100644
--- a/DEPS
+++ b/DEPS
@@ -261,7 +261,7 @@ allowed_hosts = [
 ]
 
 deps = {
-  'src': 'https://github.com/flutter/buildroot.git' + '@' + '9bbdc3ffac00cab766dd381c3272fea195f51c7c',
+  'src': 'https://github.com/flutter/buildroot.git' + '@' + '9780f253156165c515962f5f0c56235d34617689',
 
    # Fuchsia compatibility
    #
@@ -598,7 +598,7 @@ deps = {
    Var('flutter_git') + '/third_party/libpng' + '@' + '9187b6e12756317f6d44fc669ac11dfc262bd192',
 
   'src/third_party/libwebp':
-   Var('chromium_git') + '/webm/libwebp.git' + '@' + '7dfde712a477e420968732161539011e0fd446cf', # 1.2.0
+   Var('chromium_git') + '/webm/libwebp.git' + '@' + '2af26267cdfcb63a88e5c74a85927a12d6ca1d76', # 1.3.1
 
   'src/third_party/wuffs':
    Var('skia_git') + '/external/github.com/google/wuffs-mirror-release-c.git' + '@' + '600cd96cf47788ee3a74b40a6028b035c9fd6a61',
diff --git a/engine/src/flutter/ci/licenses_golden/excluded_files b/engine/src/flutter/ci/licenses_golden/excluded_files
index 6eafa7868a5..77f6c89edeb 100644
--- a/engine/src/flutter/ci/licenses_golden/excluded_files
+++ b/engine/src/flutter/ci/licenses_golden/excluded_files
@@ -2352,20 +2352,22 @@
 ../../../third_party/libtess2/Example
 ../../../third_party/libtess2/README.md
 ../../../third_party/libtess2/alg_outline.md
+../../../third_party/libwebp/.cmake-format.py
 ../../../third_party/libwebp/.git
 ../../../third_party/libwebp/.gitattributes
 ../../../third_party/libwebp/.gitignore
 ../../../third_party/libwebp/.mailmap
+../../../third_party/libwebp/.style.yapf
 ../../../third_party/libwebp/AUTHORS
 ../../../third_party/libwebp/Android.mk
 ../../../third_party/libwebp/CMakeLists.txt
+../../../third_party/libwebp/CONTRIBUTING.md
 ../../../third_party/libwebp/ChangeLog
 ../../../third_party/libwebp/Makefile.vc
 ../../../third_party/libwebp/NEWS
 ../../../third_party/libwebp/PATENTS
-../../../third_party/libwebp/README
-../../../third_party/libwebp/README.mux
-../../../third_party/libwebp/README.webp_js
+../../../third_party/libwebp/PRESUBMIT.py
+../../../third_party/libwebp/README.md
 ../../../third_party/libwebp/build.gradle
 ../../../third_party/libwebp/cmake
 ../../../third_party/libwebp/codereview.settings