diff --git a/pubspec.yaml b/pubspec.yaml
index 54c5d8cf..20629df2 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -8,6 +8,7 @@ environment:
 dependencies:
   angel_framework: ^2.0.0-alpha
   json_god: ">=2.0.0-beta <3.0.0"
+  merge_map: ^1.0.0
   mongo_dart: ">= 0.2.7 < 1.0.0"
 dev_dependencies:
   http: ">= 0.11.3 < 0.12.0"