diff --git a/DEPS b/DEPS
index 4ba5c492d47..132319bc04c 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': 'd67a5c245285bbe39c96d3e964e66243617bd063',
+  'dart_revision': '4bf74ee7d04ebc221962f6163c49320bf63336bd',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
diff --git a/engine/src/flutter/tools/const_finder/.dart_tool/package_config.json b/engine/src/flutter/tools/const_finder/.dart_tool/package_config.json
index 0afb5553489..233658b0f9b 100644
--- a/engine/src/flutter/tools/const_finder/.dart_tool/package_config.json
+++ b/engine/src/flutter/tools/const_finder/.dart_tool/package_config.json
@@ -11,7 +11,7 @@
       "name": "kernel",
       "rootUri": "../../../../third_party/dart/pkg/kernel",
       "packageUri": "lib",
-      "languageVersion": "2.2"
+      "languageVersion": "2.6"
     },
     {
       "name": "meta",