diff --git a/DEPS b/DEPS
index 14793d186f7..aade56ea12f 100644
--- a/DEPS
+++ b/DEPS
@@ -31,10 +31,10 @@ 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': 'ee15c8eb689791f6777eb3f6b0a1e9c58ff0671b',
+  'dart_revision': 'b5b8080b2cfb1e4943a19787ee96548a4a604f7b',
 
   'dart_args_tag': '0.13.7',
-  'dart_async_tag': '2.0.4',
+  'dart_async_tag': '2.0.6',
   'dart_barback_tag': '0.15.2+14',
   'dart_bazel_worker_tag': 'v0.1.9',
   'dart_boolean_selector_tag': '1.0.2',
diff --git a/engine/src/flutter/tools/licenses/pubspec.lock b/engine/src/flutter/tools/licenses/pubspec.lock
index 2317be18314..2277d0961f2 100644
--- a/engine/src/flutter/tools/licenses/pubspec.lock
+++ b/engine/src/flutter/tools/licenses/pubspec.lock
@@ -1,5 +1,5 @@
 # Generated by pub
-# See http://pub.dartlang.org/doc/glossary.html#lockfile
+# See https://www.dartlang.org/tools/pub/glossary#lockfile
 packages:
   archive:
     dependency: "direct main"
@@ -58,4 +58,4 @@ packages:
     source: hosted
     version: "1.1.5"
 sdks:
-  dart: ">=1.21.0 <=2.0.0-dev.23.0"
+  dart: ">=1.21.0 <=2.0.0-edge.0d5cf900b021bf5c9fa593ffa12b15bcd1cc5fe0"