diff --git a/package.json b/package.json
index 3cbb216..08e90d0 100644
--- a/package.json
+++ b/package.json
@@ -42,7 +42,7 @@
     "chai": "^3.5.0",
     "chartist": "^0.9.8",
     "chartist-plugin-tooltip": "git+https://github.com/Globegitter/chartist-plugin-tooltip.git",
-    "core-js": "^2.4.0",
+    "core-js": "^2.4.1",
     "del": "^2.2.1",
     "gulp": "^3.9.1",
     "gulp-autoprefixer": "^3.1.0",
diff --git a/src/scss/_login.scss b/src/scss/_login.scss
index cf718c3..a3afb7d 100644
--- a/src/scss/_login.scss
+++ b/src/scss/_login.scss
@@ -3,11 +3,11 @@
 
     background-color: $white;
     display: inline-block;
-    margin: 3em 41%;
-    max-width: 350px;
+    margin: 3em calc(50% - 175px);
     padding: 1em;
     position: relative;
     text-align: center;
+    width: 350px;
 
     form {
         box-shadow: none;