diff --git a/src/app.css b/src/app.css
index 570cd8d..f9cc198 100644
--- a/src/app.css
+++ b/src/app.css
@@ -24,3 +24,13 @@
 .read-the-docs {
   color: #888;
 }
+
+.no-arrows::-webkit-outer-spin-button,
+.no-arrows::-webkit-inner-spin-button {
+    -webkit-appearance: none;
+    margin: 0;
+}
+
+.no-arrows {
+    -moz-appearance: textfield;
+}