diff --git a/pubspec.yaml b/pubspec.yaml
index ada7eb1..5359570 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -6,13 +6,13 @@
 environment:
   sdk: '>=1.0.0 <2.0.0'
 dependencies:
-  browser: any
   http_parser: '>=0.0.2+2 <0.1.0'
   mime: '>=0.9.0 <0.10.0'
   shelf: '>=0.5.3 <0.6.0'
 dev_dependencies:
+  browser: any
   hop: '>=0.30.4 <0.32.0'
   hop_unittest: '>=0.1.0 <0.2.0'
   path: '>=1.1.0 <2.0.0'
   scheduled_test: '>=0.11.0 <0.12.0'
-  shelf_static: any
+  shelf_static: '>=0.2.0 <0.3.0'