diff --git a/.npmrc b/.npmrc
new file mode 100644
index 00000000..1dab4ed4
--- /dev/null
+++ b/.npmrc
@@ -0,0 +1 @@
+save-exact = true
diff --git a/package.json b/package.json
index 90725b0e..c048b697 100644
--- a/package.json
+++ b/package.json
@@ -12,38 +12,38 @@
     "style.js"
   ],
   "dependencies": {
-    "babel-plugin-syntax-jsx": "^6.18.0",
-    "babel-traverse": "^6.21.0",
-    "babylon": "^6.14.1",
-    "convert-source-map": "^1.3.0",
-    "escape-string-regexp": "^1.0.5",
-    "object.entries": "^1.0.4",
-    "source-map": "^0.5.6",
-    "string-hash": "^1.1.1"
+    "babel-plugin-syntax-jsx": "6.18.0",
+    "babel-traverse": "6.21.0",
+    "babylon": "6.14.1",
+    "convert-source-map": "1.3.0",
+    "escape-string-regexp": "1.0.5",
+    "object.entries": "1.0.4",
+    "source-map": "0.5.6",
+    "string-hash": "1.1.1"
   },
   "devDependencies": {
-    "ava": "^0.17.0",
-    "babel-cli": "^6.18.0",
-    "babel-core": "^6.18.2",
-    "babel-plugin-transform-runtime": "^6.15.0",
-    "babel-polyfill": "^6.16.0",
-    "babel-preset-babili": "^0.0.10",
-    "babel-preset-es2015": "^6.16.0",
-    "babel-preset-react": "^6.16.0",
-    "babel-preset-stage-3": "^6.16.0",
-    "babel-register": "^6.18.0",
-    "benchmark": "^2.1.3",
-    "gulp": "^3.9.1",
-    "gulp-babel": "^6.1.2",
-    "gulp-benchmark": "^1.1.1",
-    "human-size": "^1.1.0",
-    "mz": "^2.6.0",
-    "react": "^15.4.1",
-    "react-dom": "^15.4.1",
-    "xo": "^0.17.1"
+    "ava": "0.17.0",
+    "babel-cli": "6.18.0",
+    "babel-core": "6.18.2",
+    "babel-plugin-transform-runtime": "6.15.0",
+    "babel-polyfill": "6.16.0",
+    "babel-preset-babili": "0.0.10",
+    "babel-preset-es2015": "6.16.0",
+    "babel-preset-react": "6.16.0",
+    "babel-preset-stage-3": "6.16.0",
+    "babel-register": "6.18.0",
+    "benchmark": "2.1.3",
+    "gulp": "3.9.1",
+    "gulp-babel": "6.1.2",
+    "gulp-benchmark": "1.1.1",
+    "human-size": "1.1.0",
+    "mz": "2.6.0",
+    "react": "15.4.1",
+    "react-dom": "15.4.1",
+    "xo": "0.17.1"
   },
   "peerDependencies": {
-    "react": "^15.0"
+    "react": "15.0"
   },
   "babel": {
     "presets": [