diff --git a/modules/angular2/src/core/application_ref.ts b/modules/angular2/src/core/application_ref.ts
index a84a2ef0d3..c670f7d24f 100644
--- a/modules/angular2/src/core/application_ref.ts
+++ b/modules/angular2/src/core/application_ref.ts
@@ -250,7 +250,7 @@ export class PlatformRef_ extends PlatformRef {
         provide(ApplicationRef, {useFactory: (): ApplicationRef => app, deps: []})
       ]);
 
-      var exceptionHandler: Function;
+      var exceptionHandler: ExceptionHandler;
       try {
         injector = this.injector.resolveAndCreateChild(providers);
         exceptionHandler = injector.get(ExceptionHandler);
diff --git a/modules/angular2/src/core/reflection/reflection_capabilities.dart b/modules/angular2/src/core/reflection/reflection_capabilities.dart
index e5709670d8..1e46fdf213 100644
--- a/modules/angular2/src/core/reflection/reflection_capabilities.dart
+++ b/modules/angular2/src/core/reflection/reflection_capabilities.dart
@@ -246,8 +246,8 @@ class ReflectionCapabilities implements PlatformReflectionCapabilities {
   List _convertParameter(ParameterMirror p) {
     var t = p.type;
     var res = (!t.hasReflectedType || t.reflectedType == dynamic)
-        ? []
-        : [t.reflectedType];
+        ? <Object>[]
+        : <Object>[t.reflectedType];
     res.addAll(p.metadata.map((m) => m.reflectee));
     return res;
   }
diff --git a/modules/angular2/src/router/router.ts b/modules/angular2/src/router/router.ts
index 181e163f65..7f563f5cd3 100644
--- a/modules/angular2/src/router/router.ts
+++ b/modules/angular2/src/router/router.ts
@@ -338,7 +338,9 @@ export class Router {
         return false;
       }
       if (isPresent(this._childRouter)) {
-        return this._childRouter._routerCanDeactivate(childInstruction);
+        // TODO: ideally, this closure would map to async-await in Dart.
+        // For now, casting to any to suppress an error.
+        return <any>this._childRouter._routerCanDeactivate(childInstruction);
       }
       return true;
     });
diff --git a/scripts/ci/build_dart_ddc.sh b/scripts/ci/build_dart_ddc.sh
index c277cde3f7..1b09cd10a9 100755
--- a/scripts/ci/build_dart_ddc.sh
+++ b/scripts/ci/build_dart_ddc.sh
@@ -15,7 +15,7 @@ cd $REPO_ROOT_DIR
 DDC_TOTAL_WARNING_CAP="210"
 DDC_TOTAL_ERROR_CAP="0"
 DDC_DIR=`pwd`/tmp/dev_compiler
-DDC_VERSION="0.1.20"
+DDC_VERSION="0.1.23"
 
 # Get DDC
 mkdir -p tmp