diff --git a/package.json b/package.json
index b3b3993..eedfb36 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "binary-search",
-  "version": "1.3.4",
+  "version": "1.3.5",
   "description": "tiny binary search function with comparators",
   "license": "CC0-1.0",
   "typings": "./binary-search.d.ts",
@@ -19,8 +19,8 @@
     "url": "git://github.com/darkskyapp/binary-search.git"
   },
   "devDependencies": {
-    "chai": "^3.5.0",
-    "mocha": "^2.4.5"
+    "chai": "^4.2.0",
+    "mocha": "^5.2.0"
   },
   "scripts": {
     "test": "mocha"