diff --git a/dev/styles/main/header/header.less b/dev/styles/main/header/header.less
index 5b98a73..7f92589 100644
--- a/dev/styles/main/header/header.less
+++ b/dev/styles/main/header/header.less
@@ -944,6 +944,7 @@
     -webkit-appearance: none;
     -moz-appearance: none;
     appearance: none;
+    font-size: 16px;
 }
 .main-navigation__search-box._header-top-search-btn input {
     background: @header-top-bg-color;
@@ -1211,6 +1212,7 @@
     -webkit-appearance: none;
     -moz-appearance: none;
     appearance: none;
+    font-size: 16px;
 }
 .header-middle__search-input:focus {
     outline: none;