diff --git a/package.yaml b/package.yaml
index 6587dbedf..1467b999d 100644
--- a/package.yaml
+++ b/package.yaml
@@ -18,7 +18,7 @@ bin:
   sinopia: ./bin/sinopia
 
 dependencies:
-  express: '>= 3.4.7'
+  express: '^3.4.7'
   commander: '>= 2.1.0'
   js-yaml: '>= 3.0.1'
   cookies: '>= 0.3.8'