diff --git a/package.json b/package.json
index 1f7b98c..0c04e01 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
   "main": "./frac",
   "types": "types",
   "dependencies": {
-    "voc":"~1.0.0"
+    "voc":"^1.0.0"
   },
   "devDependencies": {
     "mocha":"~2.5.3",