diff --git a/package.json b/package.json
index 6994daf..4de5513 100644
--- a/package.json
+++ b/package.json
@@ -29,9 +29,9 @@
   "devDependencies": {
     "browser-sync": "^2.11.1",
     "browserify": "^13.0.0",
-    "browserify-istanbul": "^0.2.1",
+    "browserify-istanbul": "^2.0.0",
     "chai": "^3.0.0",
-    "gulp": "^3.9.0",
+    "gulp": "^4.0.0",
     "gulp-gh-pages": "^0.5.2",
     "gulp-sourcemaps": "^1.5.2",
     "gulp-util": "^3.0.5",
@@ -45,7 +45,7 @@
     "karma-source-map-support": "^1.0.0",
     "karma-spec-reporter": "^0.0.23",
     "lodash": "^4.0.1",
-    "mocha": "^2.2.5",
+    "mocha": "^10.1.0",
     "mversion": "^1.10.1",
     "sinon": "^1.14.1",
     "sinon-chai": "^2.8.0",