diff --git a/DEPS b/DEPS
index 73c14fa2be3..ab2412d732b 100644
--- a/DEPS
+++ b/DEPS
@@ -35,7 +35,7 @@ vars = {
   # Dart is: https://github.com/dart-lang/sdk/blob/master/DEPS.
   # You can use //tools/dart/create_updated_flutter_deps.py to produce
   # updated revision list of existing dependencies.
-  'dart_revision': '75251de89baf49c2b3722abde3fd79fb4a710f50',
+  'dart_revision': '102cf619465d41bf613b92b49c7cdd4c4b718df7',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -344,7 +344,7 @@ deps = {
    Var('dart_git') + '/package_config.git@0e208cb5a9482d780c47627368d3f5bdc409f37b',
 
   'src/third_party/dart/tools/sdks':
-   {'packages': [{'version': 'version:2.12.0-133.2.beta', 'package': 'dart/dart-sdk/${{platform}}'}], 'dep_type': 'cipd'},
+   {'packages': [{'version': 'version:2.12.0-259.8.beta', 'package': 'dart/dart-sdk/${{platform}}'}], 'dep_type': 'cipd'},
 
   # WARNING: end of dart dependencies list that is cleaned up automatically - see create_updated_flutter_deps.py.