diff --git a/sdk/pubspec.yaml b/sdk/pubspec.yaml
index 182564cbfff..5caecb1df7a 100644
--- a/sdk/pubspec.yaml
+++ b/sdk/pubspec.yaml
@@ -1,10 +1,11 @@
 author: Chromium Authors <sky-dev@googlegroups.com>
 dependencies:
-  mojo: '>=0.0.1 <1.0.0'
-  mojo_services: '>=0.0.4 <1.0.0'
-  mojom: '>=0.0.4 <1.0.0'
-  vector_math: '>=1.4.3 <2.0.0'
   cassowary: '^0.1.7'
+  mojo_services: '^0.0.17'
+  mojo: '^0.0.17'
+  mojom: '^0.0.17'
+  newton: '^0.1.0'
+  vector_math: '^1.4.3'
 description: Dart files to support executing inside Sky.
 homepage: https://github.com/domokit/mojo/tree/master/sky
 environment: