diff --git a/DEPS b/DEPS
index 6286fb783c1..2b9b16e1542 100644
--- a/DEPS
+++ b/DEPS
@@ -34,7 +34,7 @@ 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': 'fb1c5a64047719c353b30a2e061590a1532222fe',
+  'dart_revision': '998f1efbe94b169a793af9dc0047bfd8970839e2',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -377,7 +377,7 @@ deps = {
    Var('dart_git') + '/package_resolver.git' + '@' + Var('dart_package_resolver_tag'),
 
   'src/third_party/dart/tools/sdks':
-   {'packages': [{'version': 'version:2.6.0-dev.3.0', 'package': 'dart/dart-sdk/${{platform}}'}], 'dep_type': 'cipd'},
+   {'packages': [{'version': 'version:2.6.0-dev.4.0', 'package': 'dart/dart-sdk/${{platform}}'}], 'dep_type': 'cipd'},
 
   # WARNING: end of dart dependencies list that is cleaned up automatically - see create_updated_flutter_deps.py.
 
diff --git a/ci/licenses_golden/licenses_third_party b/ci/licenses_golden/licenses_third_party
index 72b930c1dcf..2f990d63440 100644
--- a/ci/licenses_golden/licenses_third_party
+++ b/ci/licenses_golden/licenses_third_party
@@ -1,4 +1,4 @@
-Signature: 221397de99943a7806e6a56aedd1942d
+Signature: 30630223b32512518398863b3cc15e83
 
 UNUSED LICENSES: