diff --git a/package.json b/package.json
index b1ca6587..2d4fdae4 100644
--- a/package.json
+++ b/package.json
@@ -29,17 +29,17 @@
     "markdown-it": "8.4.1"
   },
   "devDependencies": {
-    "@types/node": "^9.4.7",
-    "browserify": "^16.1.1",
-    "cpy-cli": "^1.0.1",
-    "eslint": "^4.19.0",
-    "glob": "^7.1.2",
-    "istanbul": "^0.4.5",
-    "nodeunit": "^0.11.2",
-    "q": "^1.5.1",
-    "rimraf": "^2.6.2",
-    "tv4": "^1.3.0",
-    "uglify-js": "^3.3.16"
+    "@types/node": "~9.4.7",
+    "browserify": "~16.1.1",
+    "cpy-cli": "~1.0.1",
+    "eslint": "~4.19.0",
+    "glob": "~7.1.2",
+    "istanbul": "~0.4.5",
+    "nodeunit": "~0.11.2",
+    "q": "~1.5.1",
+    "rimraf": "~2.6.2",
+    "tv4": "~1.3.0",
+    "uglify-js": "~3.3.16"
   },
   "keywords": [
     "markdown",