diff --git a/gulpfile.js b/gulpfile.js
index 5efea56..2160bf0 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -2,6 +2,7 @@ const gulp = require('gulp');
 const postcss = require('gulp-postcss');
 const pug = require('gulp-pug');
 const sass = require('gulp-sass');
+const terser = require('gulp-terser');
 
 sass.compiler = require('sass');
 
@@ -14,12 +15,13 @@ function html() {
 function css() {
     return gulp.src('./src/style/**/*.scss')
         .pipe(sass().on('error', sass.logError))
-        .pipe(postcss([require('autoprefixer')]))
+        .pipe(postcss([require('autoprefixer'), require('cssnano')]))
         .pipe(gulp.dest('./dist/'));
 }
 
 function js() {
-    return gulp.src('./src/script/**/*.js')
+    return gulp.src('./src/script/index.js')
+        .pipe(terser({ ecma: 5 }))
         .pipe(gulp.dest('./dist/'));
 }
 
diff --git a/package.json b/package.json
index abd95c4..4242285 100644
--- a/package.json
+++ b/package.json
@@ -19,6 +19,7 @@
     "gulp-postcss": "^8.0.0",
     "gulp-pug": "^4.0.1",
     "gulp-sass": "^4.1.0",
+    "gulp-terser": "^1.4.0",
     "npm-run-all": "^4.1.5",
     "postcss": "^7.0.34",
     "pug": "^3.0.0",
diff --git a/yarn.lock b/yarn.lock
index c978739..594d620 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -803,6 +803,11 @@ combined-stream@^1.0.6, combined-stream@~1.0.6:
   dependencies:
     delayed-stream "~1.0.0"
 
+commander@^2.20.0:
+  version "2.20.3"
+  resolved "https://registry.npmjs.org/commander/-/commander-2.20.3.tgz#fd485e84c03eb4881c20722ba48035e8531aeb33"
+  integrity sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==
+
 component-emitter@^1.2.1:
   version "1.3.0"
   resolved "https://registry.npmjs.org/component-emitter/-/component-emitter-1.3.0.tgz#16e4070fba8ae29b679f2215853ee181ab2eabc0"
@@ -1795,6 +1800,17 @@ gulp-sass@^4.1.0:
     through2 "^2.0.0"
     vinyl-sourcemaps-apply "^0.2.0"
 
+gulp-terser@^1.4.0:
+  version "1.4.0"
+  resolved "https://registry.npmjs.org/gulp-terser/-/gulp-terser-1.4.0.tgz#0ac4dfdbed4ab46906007c5b358810c1642b9764"
+  integrity sha512-7df9leJna3WOmj76tYHxjpn7BSU+vmKVjVSd6bz3uLEyrzCfZI97KPhRcIabrSNzs0UY/UXTt+JwkxPw3sF85w==
+  dependencies:
+    is-promise "^4.0.0"
+    plugin-error "^1.0.1"
+    terser ">=4"
+    through2 "^4.0.2"
+    vinyl-sourcemaps-apply "^0.2.1"
+
 gulp@^4.0.2:
   version "4.0.2"
   resolved "https://registry.npmjs.org/gulp/-/gulp-4.0.2.tgz#543651070fd0f6ab0a0650c6a3e6ff5a7cb09caa"
@@ -2216,6 +2232,11 @@ is-promise@^2.0.0:
   resolved "https://registry.npmjs.org/is-promise/-/is-promise-2.2.2.tgz#39ab959ccbf9a774cf079f7b40c7a26f763135f1"
   integrity sha512-+lP4/6lKUBfQjZ2pdxThZvLUAafmZb8OAxFb8XXtiQmS35INgr85hdOGoEs124ez1FCnZJt6jau/T+alh58QFQ==
 
+is-promise@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.npmjs.org/is-promise/-/is-promise-4.0.0.tgz#42ff9f84206c1991d26debf520dd5c01042dd2f3"
+  integrity sha512-hvpoI6korhJMnej285dSg6nu1+e6uxs7zG3BYAm5byqDsgJNWwxzM6z6iZiAgQR4TJ30JmBTOwqZUw3WlyH3AQ==
+
 is-regex@^1.0.3, is-regex@^1.1.0, is-regex@^1.1.1:
   version "1.1.1"
   resolved "https://registry.npmjs.org/is-regex/-/is-regex-1.1.1.tgz#c6f98aacc546f6cec5468a07b7b153ab564a57b9"
@@ -3707,6 +3728,15 @@ read-pkg@^3.0.0:
     normalize-package-data "^2.3.2"
     path-type "^3.0.0"
 
+readable-stream@3:
+  version "3.6.0"
+  resolved "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.0.tgz#337bbda3adc0706bd3e024426a286d4b4b2c9198"
+  integrity sha512-BViHy7LKeTz4oNnkcLJ+lVSL6vpiFeX6/d3oSH8zCW7UxP2onchk+vTGB143xuFjHS3deTgkKoXXymXqymiIdA==
+  dependencies:
+    inherits "^2.0.3"
+    string_decoder "^1.1.1"
+    util-deprecate "^1.0.1"
+
 readable-stream@^2.0.0, readable-stream@^2.0.1, readable-stream@^2.0.2, readable-stream@^2.0.5, readable-stream@^2.0.6, readable-stream@^2.1.5, readable-stream@^2.2.2, readable-stream@^2.3.3, readable-stream@^2.3.5, readable-stream@^2.3.6, readable-stream@~2.3.6:
   version "2.3.7"
   resolved "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.7.tgz#1eca1cf711aef814c04f62252a36a62f6cb23b57"
@@ -3919,7 +3949,7 @@ rimraf@2:
   dependencies:
     glob "^7.1.3"
 
-safe-buffer@^5.0.1, safe-buffer@^5.1.0, safe-buffer@^5.1.2:
+safe-buffer@^5.0.1, safe-buffer@^5.1.0, safe-buffer@^5.1.2, safe-buffer@~5.2.0:
   version "5.2.1"
   resolved "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz#1eaf9fa9bdb1fdd4ec75f58f9cdb4e6b7827eec6"
   integrity sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==
@@ -4085,6 +4115,14 @@ source-map-resolve@^0.5.0:
     source-map-url "^0.4.0"
     urix "^0.1.0"
 
+source-map-support@~0.5.12:
+  version "0.5.19"
+  resolved "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.19.tgz#a98b62f86dcaf4f67399648c085291ab9e8fed61"
+  integrity sha512-Wonm7zOCIJzBGQdB+thsPar0kYuCIzYvxZwlBa87yi/Mdjv7Tip2cyVbLj5o0cFPN4EVkuTwb3GDDyUx2DGnGw==
+  dependencies:
+    buffer-from "^1.0.0"
+    source-map "^0.6.0"
+
 source-map-url@^0.4.0:
   version "0.4.0"
   resolved "https://registry.npmjs.org/source-map-url/-/source-map-url-0.4.0.tgz#3e935d7ddd73631b97659956d55128e87b5084a3"
@@ -4102,7 +4140,7 @@ source-map@^0.5.1, source-map@^0.5.6, source-map@~0.5.1:
   resolved "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz#8a039d2d1021d22d1ea14c80d8ea468ba2ef3fcc"
   integrity sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w=
 
-source-map@^0.6.1, source-map@~0.6.0:
+source-map@^0.6.0, source-map@^0.6.1, source-map@~0.6.0, source-map@~0.6.1:
   version "0.6.1"
   resolved "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
   integrity sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==
@@ -4250,6 +4288,13 @@ string.prototype.trimstart@^1.0.1:
     define-properties "^1.1.3"
     es-abstract "^1.17.5"
 
+string_decoder@^1.1.1:
+  version "1.3.0"
+  resolved "https://registry.npmjs.org/string_decoder/-/string_decoder-1.3.0.tgz#42f114594a46cf1a8e30b0a84f56c78c3edac21e"
+  integrity sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==
+  dependencies:
+    safe-buffer "~5.2.0"
+
 string_decoder@~1.1.1:
   version "1.1.1"
   resolved "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz#9cf1611ba62685d7030ae9e4ba34149c3af03fc8"
@@ -4361,6 +4406,15 @@ tar@^2.0.0:
     fstream "^1.0.12"
     inherits "2"
 
+terser@>=4:
+  version "5.3.2"
+  resolved "https://registry.npmjs.org/terser/-/terser-5.3.2.tgz#f4bea90eb92945b2a028ceef79181b9bb586e7af"
+  integrity sha512-H67sydwBz5jCUA32ZRL319ULu+Su1cAoZnnc+lXnenGRYWyLE3Scgkt8mNoAsMx0h5kdo758zdoS0LG9rYZXDQ==
+  dependencies:
+    commander "^2.20.0"
+    source-map "~0.6.1"
+    source-map-support "~0.5.12"
+
 through2-filter@^3.0.0:
   version "3.0.0"
   resolved "https://registry.npmjs.org/through2-filter/-/through2-filter-3.0.0.tgz#700e786df2367c2c88cd8aa5be4cf9c1e7831254"
@@ -4377,6 +4431,13 @@ through2@^2.0.0, through2@^2.0.3, through2@~2.0.0:
     readable-stream "~2.3.6"
     xtend "~4.0.1"
 
+through2@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.npmjs.org/through2/-/through2-4.0.2.tgz#a7ce3ac2a7a8b0b966c80e7c49f0484c3b239764"
+  integrity sha512-iOqSav00cVxEEICeD7TjLB1sueEL+81Wpzp2bY17uZjZN0pWZPuo4suZ/61VujxmqSGFfgOcNuTZ85QJwNZQpw==
+  dependencies:
+    readable-stream "3"
+
 time-stamp@^1.0.0:
   version "1.1.0"
   resolved "https://registry.npmjs.org/time-stamp/-/time-stamp-1.1.0.tgz#764a5a11af50561921b133f3b44e618687e0f5c3"
@@ -4605,7 +4666,7 @@ use@^3.1.0:
   resolved "https://registry.npmjs.org/use/-/use-3.1.1.tgz#d50c8cac79a19fbc20f2911f56eb973f4e10070f"
   integrity sha512-cwESVXlO3url9YWlFW/TA9cshCEhtu7IKJ/p5soJ/gGpj7vbvFrAY/eIioQ6Dw23KjZhYgiIo8HOs1nQ2vr/oQ==
 
-util-deprecate@^1.0.2, util-deprecate@~1.0.1:
+util-deprecate@^1.0.1, util-deprecate@^1.0.2, util-deprecate@~1.0.1:
   version "1.0.2"
   resolved "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz#450d4dc9fa70de732762fbd2d4a28981419a0ccf"
   integrity sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=