diff --git a/package.json b/package.json
index fa361b8..e4465fc 100644
--- a/package.json
+++ b/package.json
@@ -21,6 +21,10 @@
     "since 2017-06"
   ],
   "devDependencies": {
-    "npm-run-all": "^4.1.5"
-  }
+    "npm-run-all": "^4.1.5",
+    "pre-commit": "^1.2.2"
+  },
+  "pre-commit": [
+    "build"
+  ]
 }
diff --git a/yarn.lock b/yarn.lock
index d979e15..4f50c41 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1574,7 +1574,7 @@ concat-map@0.0.1:
   resolved "https://registry.yarnpkg.com/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
   integrity sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=
 
-concat-stream@~1.6.0:
+concat-stream@^1.4.7, concat-stream@~1.6.0:
   version "1.6.2"
   resolved "https://registry.yarnpkg.com/concat-stream/-/concat-stream-1.6.2.tgz#904bdf194cd3122fc675c77fc4ac3d4ff0fd1a34"
   integrity sha512-27HBghJxjiZtIk3Ycvn/4kbJk/1uZuJFfuPEns6LaEvpvG1f0hTea8lilrouyo9mVc2GWdcEZ8OLoGmSADlrCw==
@@ -1665,6 +1665,15 @@ create-hmac@^1.1.0, create-hmac@^1.1.4, create-hmac@^1.1.7:
     safe-buffer "^5.0.1"
     sha.js "^2.4.8"
 
+cross-spawn@^5.0.1:
+  version "5.1.0"
+  resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-5.1.0.tgz#e8bd0efee58fcff6f8f94510a0a554bbfa235449"
+  integrity sha1-6L0O/uWPz/b4+UUQoKVUu/ojVEk=
+  dependencies:
+    lru-cache "^4.0.1"
+    shebang-command "^1.2.0"
+    which "^1.2.9"
+
 cross-spawn@^6.0.4, cross-spawn@^6.0.5:
   version "6.0.5"
   resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-6.0.5.tgz#4a5ec7c64dfae22c3a14124dbacdee846d80cbc4"
@@ -3152,6 +3161,14 @@ log-symbols@^2.2.0:
   dependencies:
     chalk "^2.0.1"
 
+lru-cache@^4.0.1:
+  version "4.1.5"
+  resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-4.1.5.tgz#8bbe50ea85bed59bc9e33dcab8235ee9bcf443cd"
+  integrity sha512-sWZlbEP2OsHNkXrMl5GYk/jKk70MBng6UU4YI/qGDYbgf6YbP4EvmqISbXCoJiRKs+1bSpFHVgQxvJ17F2li5g==
+  dependencies:
+    pseudomap "^1.0.2"
+    yallist "^2.1.2"
+
 magic-string@^0.22.4:
   version "0.22.5"
   resolved "https://registry.yarnpkg.com/magic-string/-/magic-string-0.22.5.tgz#8e9cf5afddf44385c1da5bc2a6a0dbd10b03657e"
@@ -3566,6 +3583,11 @@ os-browserify@^0.3.0:
   resolved "https://registry.yarnpkg.com/os-browserify/-/os-browserify-0.3.0.tgz#854373c7f5c2315914fc9bfc6bd8238fdda1ec27"
   integrity sha1-hUNzx/XCMVkU/Jv8a9gjj92h7Cc=
 
+os-shim@^0.1.2:
+  version "0.1.3"
+  resolved "https://registry.yarnpkg.com/os-shim/-/os-shim-0.1.3.tgz#6b62c3791cf7909ea35ed46e17658bb417cb3917"
+  integrity sha1-a2LDeRz3kJ6jXtRuF2WLtBfLORc=
+
 pako@^0.2.5:
   version "0.2.9"
   resolved "https://registry.yarnpkg.com/pako/-/pako-0.2.9.tgz#f3f7522f4ef782348da8161bad9ecfd51bf83a75"
@@ -4135,6 +4157,15 @@ posthtml@^0.13.4:
     posthtml-parser "^0.5.0"
     posthtml-render "^1.2.3"
 
+pre-commit@^1.2.2:
+  version "1.2.2"
+  resolved "https://registry.yarnpkg.com/pre-commit/-/pre-commit-1.2.2.tgz#dbcee0ee9de7235e57f79c56d7ce94641a69eec6"
+  integrity sha1-287g7p3nI15X95xW186UZBpp7sY=
+  dependencies:
+    cross-spawn "^5.0.1"
+    spawn-sync "^1.0.15"
+    which "1.2.x"
+
 prelude-ls@~1.1.2:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.1.2.tgz#21932a549f5e52ffd9a827f570e04be62a97da54"
@@ -4150,6 +4181,11 @@ process@^0.11.10:
   resolved "https://registry.yarnpkg.com/process/-/process-0.11.10.tgz#7332300e840161bda3e69a1d1d91a7d4bc16f182"
   integrity sha1-czIwDoQBYb2j5podHZGn1LwW8YI=
 
+pseudomap@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/pseudomap/-/pseudomap-1.0.2.tgz#f052a28da70e618917ef0a8ac34c1ae5a68286b3"
+  integrity sha1-8FKijacOYYkX7wqKw0wa5aaChrM=
+
 psl@^1.1.28:
   version "1.8.0"
   resolved "https://registry.yarnpkg.com/psl/-/psl-1.8.0.tgz#9326f8bcfb013adcc005fdff056acce020e51c24"
@@ -4671,6 +4707,14 @@ source-map@^0.5.0, source-map@^0.5.6:
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.7.tgz#8a039d2d1021d22d1ea14c80d8ea468ba2ef3fcc"
   integrity sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=
 
+spawn-sync@^1.0.15:
+  version "1.0.15"
+  resolved "https://registry.yarnpkg.com/spawn-sync/-/spawn-sync-1.0.15.tgz#b00799557eb7fb0c8376c29d44e8a1ea67e57476"
+  integrity sha1-sAeZVX63+wyDdsKdROih6mfldHY=
+  dependencies:
+    concat-stream "^1.4.7"
+    os-shim "^0.1.2"
+
 spdx-correct@^3.0.0:
   version "3.1.1"
   resolved "https://registry.yarnpkg.com/spdx-correct/-/spdx-correct-3.1.1.tgz#dece81ac9c1e6713e5f7d1b6f17d468fa53d89a9"
@@ -5280,6 +5324,13 @@ whatwg-url@^7.0.0:
     tr46 "^1.0.1"
     webidl-conversions "^4.0.2"
 
+which@1.2.x:
+  version "1.2.14"
+  resolved "https://registry.yarnpkg.com/which/-/which-1.2.14.tgz#9a87c4378f03e827cecaf1acdf56c736c01c14e5"
+  integrity sha1-mofEN48D6CfOyvGs31bHNsAcFOU=
+  dependencies:
+    isexe "^2.0.0"
+
 which@^1.2.9:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/which/-/which-1.3.1.tgz#a45043d54f5805316da8d62f9f50918d3da70b0a"
@@ -5325,3 +5376,8 @@ xtend@^4.0.0, xtend@~4.0.1:
   version "4.0.2"
   resolved "https://registry.yarnpkg.com/xtend/-/xtend-4.0.2.tgz#bb72779f5fa465186b1f438f674fa347fdb5db54"
   integrity sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==
+
+yallist@^2.1.2:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/yallist/-/yallist-2.1.2.tgz#1c11f9218f076089a47dd512f93c6699a6a81d52"
+  integrity sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=