diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..4095353
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,1532 @@
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+}
diff --git a/package.json b/package.json
index 36c18f0..d66205a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mathjax-node-svg2png",
-  "version": "1.1.0",
+  "version": "2.0.0",
   "description": "Extend mathjax-node using svg2png",
   "main": "./lib/main.js",
   "scripts": {
@@ -24,8 +24,8 @@
   },
   "homepage": "https://github.com/pkra/mathjax-node-svg2png#readme",
   "dependencies": {
-    "mathjax-node": "^2.0.0",
-    "svg2png": "*"
+    "mathjax-node": "~2",
+    "svg2png": "~4"
   },
   "devDependencies": {
     "tape": "^4.5.1"