diff --git a/package.json b/package.json
index dd029f8..88b216a 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
   "main": "./lib/unexpected-sinon.js",
   "peerDependencies": {
     "sinon": "*",
-    "unexpected": "10"
+    "unexpected": "^10.5.0"
   },
   "devDependencies": {
     "coveralls": "2.11.3",
@@ -38,7 +38,7 @@
     "mocha": "2.2.5",
     "serve": "*",
     "sinon": "1.16.1",
-    "unexpected": "10.3.1",
+    "unexpected": "10.5.0",
     "unexpected-documentation-site-generator": "^3.3.1"
   }
 }