diff --git a/CHANGELOG.md b/CHANGELOG.md
index 83c3efdc..1b992d2e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+# 1.0.10
+
+* Support optional `new`/`const` (#652).
+
 # 1.0.9
 
 * Updated tests. No user-facing changes.
diff --git a/bin/format.dart b/bin/format.dart
index bdd5a9bc..22c266c8 100644
--- a/bin/format.dart
+++ b/bin/format.dart
@@ -14,7 +14,7 @@ import 'package:dart_style/src/io.dart';
 import 'package:dart_style/src/source_code.dart';
 
 // Note: The following line of code is modified by tool/grind.dart.
-const version = "1.0.9";
+const version = "1.0.10";
 
 void main(List<String> args) {
   var parser = new ArgParser(allowTrailingOptions: true);
diff --git a/lib/src/dart_formatter.dart b/lib/src/dart_formatter.dart
index 22d0a6a8..3db322f2 100644
--- a/lib/src/dart_formatter.dart
+++ b/lib/src/dart_formatter.dart
@@ -103,7 +103,7 @@ class DartFormatter {
 
     // Parse it.
     var parser = new Parser(stringSource, errorListener);
-    parser.enableAssertInitializer = true;
+    parser.enableOptionalNewAndConst = true;
 
     AstNode node;
     if (source.isCompilationUnit) {
diff --git a/lib/src/source_visitor.dart b/lib/src/source_visitor.dart
index cef1340f..c6bd29b0 100644
--- a/lib/src/source_visitor.dart
+++ b/lib/src/source_visitor.dart
@@ -1341,8 +1341,7 @@ class SourceVisitor extends ThrowingAstVisitor {
 
   visitInstanceCreationExpression(InstanceCreationExpression node) {
     builder.startSpan();
-    token(node.keyword);
-    space();
+    token(node.keyword, after: space);
     builder.startSpan(Cost.constructorName);
 
     // Start the expression nesting for the argument list here, in case this
diff --git a/pubspec.lock b/pubspec.lock
index 1c02112c..abdb12db 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -7,7 +7,7 @@ packages:
       name: analyzer
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.31.0"
+    version: "0.31.2-alpha.0"
   args:
     dependency: "direct main"
     description:
@@ -21,7 +21,7 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.3"
+    version: "2.0.4"
   barback:
     dependency: transitive
     description:
@@ -91,7 +91,7 @@ packages:
       name: front_end
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.0-alpha.8"
+    version: "0.1.0-alpha.10"
   glob:
     dependency: transitive
     description:
@@ -161,7 +161,7 @@ packages:
       name: kernel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.0-alpha.5"
+    version: "0.3.0-alpha.10"
   logging:
     dependency: transitive
     description:
@@ -301,7 +301,7 @@ packages:
       name: stack_trace
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.9.1"
+    version: "1.9.2"
   stream_channel:
     dependency: transitive
     description:
@@ -329,7 +329,7 @@ packages:
       name: test
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.30+1"
+    version: "0.12.30+3"
   test_descriptor:
     dependency: "direct dev"
     description:
@@ -371,7 +371,7 @@ packages:
       name: web_socket_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.6"
+    version: "1.0.7"
   yaml:
     dependency: "direct dev"
     description:
@@ -380,4 +380,4 @@ packages:
     source: hosted
     version: "2.1.13"
 sdks:
-  dart: "2.0.0-dev.20.0"
+  dart: ">=2.0.0-dev.23.0 <=2.0.0-edge.d5105da9cabff92c398d90d7c80fc23b5e38e012"
diff --git a/pubspec.yaml b/pubspec.yaml
index 0d9467f7..e89d9095 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,27 +1,27 @@
 name: dart_style
 # Note: See tool/grind.dart for how to bump the version.
-version: 1.0.9+1
+version: 1.0.10
 author: Dart Team <misc@dartlang.org>
 description: Opinionated, automatic Dart source code formatter.
 homepage: https://github.com/dart-lang/dart_style
 environment:
-  sdk: ">=1.8.0 <2.0.0"
+  sdk: '>=1.8.0 <2.0.0'
 dependencies:
-  analyzer: '>=0.30.0 <0.32.0'
+  analyzer: ^0.31.2-alpha.0
   args: '>=0.12.1 <2.0.0'
-  path: '>=1.0.0 <2.0.0'
-  source_span: '>=1.4.0 <2.0.0'
+  path: ^1.0.0
+  source_span: ^1.4.0
 dev_dependencies:
   async: '>=1.0.0 <=3.0.0'
-  browser: '>=0.10.0 <0.11.0'
-  grinder: '^0.8.0'
+  browser: ^0.10.0
+  grinder: ^0.8.0
   js: ^0.6.0
   node_preamble: ^1.0.0
-  pub_semver: '^1.2.3'
-  test: '>=0.12.0 <0.13.0'
-  test_descriptor: "^1.0.0"
-  test_process: "^1.0.0"
-  yaml: '^2.0.0'
+  pub_semver: ^1.2.3
+  test: ^0.12.0
+  test_descriptor: ^1.0.0
+  test_process: ^1.0.0
+  yaml: ^2.0.0
 executables:
   dartfmt: format
   dartformat: format # Allow the old name for compatibility.
diff --git a/test/whitespace/type_arguments.stmt b/test/whitespace/type_arguments.stmt
index d0e304ba..159d1cdc 100644
--- a/test/whitespace/type_arguments.stmt
+++ b/test/whitespace/type_arguments.stmt
@@ -6,4 +6,8 @@ new Foo<T>();
 >>> space between names
 new Foo<  A,B,   C,D>();
 <<<
-new Foo<A, B, C, D>();
\ No newline at end of file
+new Foo<A, B, C, D>();
+>>> named constructor with implicit "new"
+C <  int  ,float>  .named(42);
+<<<
+C<int, float>.named(42);
\ No newline at end of file