diff --git a/CHANGELOG.md b/CHANGELOG.md
index d1bf478..1fecba3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+## v4.1.0
++ Added CSS `user-select: none` and `pointer-events: none` for snowflakes.
+
 ## v4.0.2
 + Updated dev deps in package.json.
 
diff --git a/gulpfile.js b/gulpfile.js
index 22fabdd..9341044 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -15,9 +15,8 @@ function replaceStyle(tag, filename) {
 }
 
 function js(imagesStyle, outputFile) {
-    return gulp.src('src/js/snowflakes.js')
+    return gulp.src(['src/js/*.js'])
         .pipe($.rollup({
-            allowRealFiles: true,
             input: 'src/js/snowflakes.js',
             output: {
                 format: 'umd',
diff --git a/package-lock.json b/package-lock.json
index bf5e179..b667347 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "magic-snowflakes",
-  "version": "4.0.2",
+  "version": "4.1.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -14,21 +14,21 @@
       }
     },
     "@babel/core": {
-      "version": "7.1.2",
-      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.1.2.tgz",
-      "integrity": "sha512-IFeSSnjXdhDaoysIlev//UzHZbdEmm7D0EIH2qtse9xK7mXEZQpYjs2P00XlP1qYsYvid79p+Zgg6tz1mp6iVw==",
+      "version": "7.1.6",
+      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.1.6.tgz",
+      "integrity": "sha512-Hz6PJT6e44iUNpAn8AoyAs6B3bl60g7MJQaI0rZEar6ECzh6+srYO1xlIdssio34mPaUtAb1y+XlkkSJzok3yw==",
       "dev": true,
       "requires": {
         "@babel/code-frame": "^7.0.0",
-        "@babel/generator": "^7.1.2",
-        "@babel/helpers": "^7.1.2",
-        "@babel/parser": "^7.1.2",
+        "@babel/generator": "^7.1.6",
+        "@babel/helpers": "^7.1.5",
+        "@babel/parser": "^7.1.6",
         "@babel/template": "^7.1.2",
-        "@babel/traverse": "^7.1.0",
-        "@babel/types": "^7.1.2",
+        "@babel/traverse": "^7.1.6",
+        "@babel/types": "^7.1.6",
         "convert-source-map": "^1.1.0",
-        "debug": "^3.1.0",
-        "json5": "^0.5.0",
+        "debug": "^4.1.0",
+        "json5": "^2.1.0",
         "lodash": "^4.17.10",
         "resolve": "^1.3.2",
         "semver": "^5.4.1",
@@ -36,12 +36,12 @@
       }
     },
     "@babel/generator": {
-      "version": "7.1.3",
-      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.1.3.tgz",
-      "integrity": "sha512-ZoCZGcfIJFJuZBqxcY9OjC1KW2lWK64qrX1o4UYL3yshVhwKFYgzpWZ0vvtGMNJdTlvkw0W+HR1VnYN8q3QPFQ==",
+      "version": "7.1.6",
+      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.1.6.tgz",
+      "integrity": "sha512-brwPBtVvdYdGxtenbQgfCdDPmtkmUBZPjUoK5SXJEBuHaA5BCubh9ly65fzXz7R6o5rA76Rs22ES8Z+HCc0YIQ==",
       "dev": true,
       "requires": {
-        "@babel/types": "^7.1.3",
+        "@babel/types": "^7.1.6",
         "jsesc": "^2.5.1",
         "lodash": "^4.17.10",
         "source-map": "^0.5.0",
@@ -241,14 +241,14 @@
       }
     },
     "@babel/helpers": {
-      "version": "7.1.2",
-      "resolved": "https://registry.npmjs.org/@babel/helpers/-/helpers-7.1.2.tgz",
-      "integrity": "sha512-Myc3pUE8eswD73aWcartxB16K6CGmHDv9KxOmD2CeOs/FaEAQodr3VYGmlvOmog60vNQ2w8QbatuahepZwrHiA==",
+      "version": "7.1.5",
+      "resolved": "https://registry.npmjs.org/@babel/helpers/-/helpers-7.1.5.tgz",
+      "integrity": "sha512-2jkcdL02ywNBry1YNFAH/fViq4fXG0vdckHqeJk+75fpQ2OH+Az6076tX/M0835zA45E0Cqa6pV5Kiv9YOqjEg==",
       "dev": true,
       "requires": {
         "@babel/template": "^7.1.2",
-        "@babel/traverse": "^7.1.0",
-        "@babel/types": "^7.1.2"
+        "@babel/traverse": "^7.1.5",
+        "@babel/types": "^7.1.5"
       }
     },
     "@babel/highlight": {
@@ -263,9 +263,9 @@
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     },
     "@babel/parser": {
-      "version": "7.1.3",
-      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.1.3.tgz",
-      "integrity": "sha512-gqmspPZOMW3MIRb9HlrnbZHXI1/KHTOroBwN1NcLL6pWxzqzEKGvRTq0W/PxS45OtQGbaFikSQpkS5zbnsQm2w==",
+      "version": "7.1.6",
+      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.1.6.tgz",
+      "integrity": "sha512-dWP6LJm9nKT6ALaa+bnL247GHHMWir3vSlZ2+IHgHgktZQx0L3Uvq2uAWcuzIe+fujRsYWBW2q622C5UvGK9iQ==",
       "dev": true
     },
     "@babel/plugin-proposal-async-generator-functions": {
@@ -409,9 +409,9 @@
       }
     },
     "@babel/plugin-transform-block-scoping": {
-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-block-scoping/-/plugin-transform-block-scoping-7.0.0.tgz",
-      "integrity": "sha512-GWEMCrmHQcYWISilUrk9GDqH4enf3UmhOEbNbNrlNAX1ssH3MsS1xLOS6rdjRVPgA7XXVPn87tRkdTEoA/dxEg==",
+      "version": "7.1.5",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-block-scoping/-/plugin-transform-block-scoping-7.1.5.tgz",
+      "integrity": "sha512-jlYcDrz+5ayWC7mxgpn1Wj8zj0mmjCT2w0mPIMSwO926eXBRxpEgoN/uQVRBfjtr8ayjcmS+xk2G1jaP8JjMJQ==",
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@@ -649,9 +649,9 @@
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     "@babel/preset-env": {
-      "version": "7.1.0",
-      "resolved": "https://registry.npmjs.org/@babel/preset-env/-/preset-env-7.1.0.tgz",
-      "integrity": "sha512-ZLVSynfAoDHB/34A17/JCZbyrzbQj59QC1Anyueb4Bwjh373nVPq5/HMph0z+tCmcDjXDe+DlKQq9ywQuvWrQg==",
+      "version": "7.1.6",
+      "resolved": "https://registry.npmjs.org/@babel/preset-env/-/preset-env-7.1.6.tgz",
+      "integrity": "sha512-YIBfpJNQMBkb6MCkjz/A9J76SNCSuGVamOVBgoUkLzpJD/z8ghHi9I42LQ4pulVX68N/MmImz6ZTixt7Azgexw==",
       "dev": true,
       "requires": {
         "@babel/helper-module-imports": "^7.0.0",
@@ -667,7 +667,7 @@
         "@babel/plugin-transform-arrow-functions": "^7.0.0",
         "@babel/plugin-transform-async-to-generator": "^7.1.0",
         "@babel/plugin-transform-block-scoped-functions": "^7.0.0",
-        "@babel/plugin-transform-block-scoping": "^7.0.0",
+        "@babel/plugin-transform-block-scoping": "^7.1.5",
         "@babel/plugin-transform-classes": "^7.1.0",
         "@babel/plugin-transform-computed-properties": "^7.0.0",
         "@babel/plugin-transform-destructuring": "^7.0.0",
@@ -709,26 +709,26 @@
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     "@babel/traverse": {
-      "version": "7.1.4",
-      "resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.1.4.tgz",
-      "integrity": "sha512-my9mdrAIGdDiSVBuMjpn/oXYpva0/EZwWL3sm3Wcy/AVWO2eXnsoZruOT9jOGNRXU8KbCIu5zsKnXcAJ6PcV6Q==",
+      "version": "7.1.6",
+      "resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.1.6.tgz",
+      "integrity": "sha512-CXedit6GpISz3sC2k2FsGCUpOhUqKdyL0lqNrImQojagnUMXf8hex4AxYFRuMkNGcvJX5QAFGzB5WJQmSv8SiQ==",
       "dev": true,
       "requires": {
         "@babel/code-frame": "^7.0.0",
-        "@babel/generator": "^7.1.3",
+        "@babel/generator": "^7.1.6",
         "@babel/helper-function-name": "^7.1.0",
         "@babel/helper-split-export-declaration": "^7.0.0",
-        "@babel/parser": "^7.1.3",
-        "@babel/types": "^7.1.3",
-        "debug": "^3.1.0",
+        "@babel/parser": "^7.1.6",
+        "@babel/types": "^7.1.6",
+        "debug": "^4.1.0",
         "globals": "^11.1.0",
         "lodash": "^4.17.10"
       }
     },
     "@babel/types": {
-      "version": "7.1.3",
-      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.1.3.tgz",
-      "integrity": "sha512-RpPOVfK+yatXyn8n4PB1NW6k9qjinrXrRR8ugBN8fD6hCy5RXI6PSbVqpOJBO9oSaY7Nom4ohj35feb0UR9hSA==",
+      "version": "7.1.6",
+      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.1.6.tgz",
+      "integrity": "sha512-DMiUzlY9DSjVsOylJssxLHSgj6tWM9PRFJOGW/RaOglVOK9nzTxoOMfTfRQXGUCUQ/HmlG2efwC+XqUEJ5ay4w==",
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@@ -767,24 +767,21 @@
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-      "version": "5.7.3",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.3.tgz",
-      "integrity": "sha512-T/zvzYRfbVojPWahDsE5evJdHb3oJoQfFbsrKM7w5Zcs++Tr257tia3BmMP8XYVjp1S9RZXQMh7gao96BlqZOw==",
+      "version": "6.0.4",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.0.4.tgz",
+      "integrity": "sha512-VY4i5EKSKkofY2I+6QLTbTTN/UvEQPCo6eiwzzSaSWfpaDhOmStMCMod6wmuPciNq+XS0faCglFu2lHZpdHUtg==",
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-      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-4.1.1.tgz",
-      "integrity": "sha512-JY+iV6r+cO21KtntVvFkD+iqjtdpRUpGqKWgfkCdZq1R+kbreEl8EcdcJR4SmiIgsIQT33s6QzheQ9a275Q8xw==",
-      "dev": true,
-      "requires": {
-        "acorn": "^5.0.3"
-      }
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.0.1.tgz",
+      "integrity": "sha512-HJ7CfNHrfJLlNTzIEUTj43LNWGkqpRLxm3YjAlcD0ACydk9XynzYsCBHxut+iqt+1aBXkx9UP/w/ZqMr13XIzg==",
+      "dev": true
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     "ajv": {
-      "version": "6.5.4",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.5.4.tgz",
-      "integrity": "sha512-4Wyjt8+t6YszqaXnLDfMmG/8AlO5Zbcsy3ATHncCzjW/NoPzAId8AK6749Ybjmdt+kUY1gP60fCu46oDxPv/mg==",
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+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.6.1.tgz",
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@@ -835,7 +832,7 @@
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-      "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-3.1.0.tgz",
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@@ -1041,12 +1038,6 @@
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@@ -1076,6 +1067,12 @@
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+      "resolved": "https://registry.npmjs.org/astral-regex/-/astral-regex-1.0.0.tgz",
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@@ -1117,17 +1114,17 @@
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+      "resolved": "https://registry.npmjs.org/autoprefixer/-/autoprefixer-9.3.1.tgz",
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       "requires": {
-        "browserslist": "^4.1.0",
-        "caniuse-lite": "^1.0.30000884",
+        "browserslist": "^4.3.3",
+        "caniuse-lite": "^1.0.30000898",
         "normalize-range": "^0.1.2",
         "num2fraction": "^1.2.2",
-        "postcss": "^7.0.2",
-        "postcss-value-parser": "^3.2.3"
+        "postcss": "^7.0.5",
+        "postcss-value-parser": "^3.3.1"
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@@ -1253,9 +1250,9 @@
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-        "electron-to-chromium": "^1.3.73",
-        "node-releases": "^1.0.0-alpha.12"
+        "caniuse-lite": "^1.0.30000899",
+        "electron-to-chromium": "^1.3.82",
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@@ -1354,7 +1351,7 @@
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+      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.15.2.tgz",
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@@ -6725,14 +6642,14 @@
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+      "version": "5.1.1",
+      "resolved": "https://registry.npmjs.org/table/-/table-5.1.1.tgz",
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-        "lodash": "^4.17.10",
-        "slice-ansi": "1.0.0",
+        "ajv": "^6.6.1",
+        "lodash": "^4.17.11",
+        "slice-ansi": "2.0.0",
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@@ -6743,9 +6660,9 @@
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+      "version": "2.4.0",
+      "resolved": "https://registry.npmjs.org/textextensions/-/textextensions-2.4.0.tgz",
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@@ -6755,12 +6672,12 @@
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-      "resolved": "https://registry.npmjs.org/through2/-/through2-2.0.3.tgz",
-      "integrity": "sha1-AARWmzfHx0ujnEPzzteNGtlBQL4=",
+      "version": "2.0.5",
+      "resolved": "https://registry.npmjs.org/through2/-/through2-2.0.5.tgz",
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diff --git a/package.json b/package.json
index 108a7fd..7c1e0cc 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "magic-snowflakes",
   "description": "Falling snowflakes",
-  "version": "4.0.2",
+  "version": "4.1.0",
   "author": {
     "name": "Denis Seleznev",
     "email": "hcodes@yandex.ru",
@@ -33,12 +33,12 @@
     "dist/snowflakes.light.min.js"
   ],
   "devDependencies": {
-    "@babel/core": "^7.1.2",
+    "@babel/core": "^7.1.6",
     "@babel/plugin-proposal-class-properties": "^7.1.0",
-    "@babel/preset-env": "^7.1.0",
+    "@babel/preset-env": "^7.1.6",
     "babel-eslint": "^10.0.1",
     "del": "^3.0.0",
-    "eslint": "^5.7.0",
+    "eslint": "^5.9.0",
     "gulp": "~4.0.0",
     "gulp-autoprefixer": "^6.0.0",
     "gulp-cleancss": "^0.2.2",
diff --git a/src/less/main.less b/src/less/main.less
index 445cdf2..9b50457 100644
--- a/src/less/main.less
+++ b/src/less/main.less
@@ -19,6 +19,8 @@
     position: absolute;
     animation: snowflake_y 10s infinite linear;
     will-change: transform;
+    user-select: none;
+    pointer-events: none;
 
     &__inner {
         position: absolute;