diff --git a/.dockerignore b/.dockerignore
index d0221be9..34953d03 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -15,6 +15,7 @@ Dockerfile
 Dockerfile.alpine
 
 webpack.config.js
+cssnano.config.js
 
 bin/release.js
 
diff --git a/.npmignore b/.npmignore
index cbc2ab26..7f7cd7e0 100644
--- a/.npmignore
+++ b/.npmignore
@@ -11,6 +11,7 @@ html
 yarn-error.log
 yarn.lock
 now.json
+cssnano.config.js
 
 modules/jquery-mouse-wheel
 
diff --git a/.webpack/css.js b/.webpack/css.js
index 280d1107..49694282 100644
--- a/.webpack/css.js
+++ b/.webpack/css.js
@@ -30,7 +30,7 @@ const clean = (a) => a.filter(Boolean);
 const plugins = clean([
     ...cssPlugins,
     extractMain,
-    !isDev && new OptimizeCssAssetsPlugin({}),
+    !isDev && new OptimizeCssAssetsPlugin(),
 ]);
 
 const rules = [{
diff --git a/cssnano.config.js b/cssnano.config.js
new file mode 100644
index 00000000..b5b4d7b2
--- /dev/null
+++ b/cssnano.config.js
@@ -0,0 +1,15 @@
+'use strict';
+
+// used by OptimizeCssAssetsPlugin
+
+const defaultPreset = require('cssnano-preset-default');
+
+module.exports = defaultPreset({
+    svgo: {
+        plugins: [
+            {convertPathData: false},
+            {convertShapeToPath: false},
+        ]
+    }
+});
+
diff --git a/package.json b/package.json
index 1ddd5a96..89a6ab5d 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
   },
   "config": {
     "dirs": "bin/cloudcmd.js common server",
-    "dirs_test": "test bin/release.js webpack.config.js .webpack"
+    "dirs_test": "test bin/release.js webpack.config.js cssnano.config.js .webpack"
   },
   "scripts": {
     "start": "node bin/cloudcmd.js",