diff --git a/package.json b/package.json
index fdeaca89..7ae44c37 100644
--- a/package.json
+++ b/package.json
@@ -29,9 +29,9 @@
     "markdown-it": "8.4.1"
   },
   "devDependencies": {
-    "@types/node": "^9.6.15",
+    "@types/node": "~9.6.15",
     "browserify": "~16.2.2",
-    "cpy-cli": "~1.0.1",
+    "cpy-cli": "~2.0.0",
     "eslint": "~4.19.1",
     "glob": "~7.1.2",
     "istanbul": "~0.4.5",
@@ -41,7 +41,7 @@
     "toml": "~2.3.3",
     "tv4": "~1.3.0",
     "typescript": "~2.8.3",
-    "uglify-js": "~3.3.25"
+    "uglify-js": "~3.3.27"
   },
   "keywords": [
     "markdown",