diff --git a/package.json b/package.json
index e071198..fe6df3c 100644
--- a/package.json
+++ b/package.json
@@ -53,7 +53,7 @@
     "load-grunt-tasks": "3.5.x",
     "performance-now": "2.0.x",
     "quiet-grunt": "0.2.x",
-    "semver": "5.4.x",
+    "semver": "~5.5.1",
     "semver-sort": "0.0.x",
     "sinon": "^5.1.1",
     "source-map-support": "^0.5.6"