diff --git a/.npmrc b/.npmrc
new file mode 100644
index 00000000..cffe8cde
--- /dev/null
+++ b/.npmrc
@@ -0,0 +1 @@
+save-exact=true
diff --git a/package.json b/package.json
index 97cc2694..bf08ddda 100644
--- a/package.json
+++ b/package.json
@@ -46,13 +46,13 @@
   "homepage": "https://github.com/zeit/list#readme",
   "devDependencies": {
     "babel-plugin-transform-async-to-generator": "6.16.0",
-    "babel-plugin-transform-es2015-modules-commonjs": "^6.11.5",
+    "babel-plugin-transform-es2015-modules-commonjs": "6.11.5",
     "gulp": "3.9.1",
     "gulp-babel": "6.1.2",
     "gulp-cached": "1.1.0",
     "gulp-chmod": "1.3.0",
     "gulp-sass": "2.3.2",
-    "xo": "^0.16.0"
+    "xo": "0.16.0"
   },
   "dependencies": {
     "args": "2.0.0",
@@ -61,8 +61,8 @@
     "filesize": "3.3.0",
     "handlebars": "4.0.5",
     "istextorbinary": "2.1.0",
-    "micro": "^6.0.1",
-    "micro-compress": "^1.0.0",
+    "micro": "6.0.1",
+    "micro-compress": "1.0.0",
     "mime": "1.3.4"
   }
 }