diff --git a/package.json b/package.json
index 19882f0bb..9cd7f33bc 100755
--- a/package.json
+++ b/package.json
@@ -10,6 +10,7 @@
         "build": "webpack --mode production"
     },
     "dependencies": {
+        "classnames": "2.2.6",
         "prop-types": "15.6.1",
         "react": "16.4.0",
         "react-dom": "16.4.0",
diff --git a/yarn.lock b/yarn.lock
index 1962575c2..1bccd98a5 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1247,6 +1247,10 @@ class-utils@^0.3.5:
     isobject "^3.0.0"
     static-extend "^0.1.1"
 
+classnames@2.2.6:
+  version "2.2.6"
+  resolved "https://registry.yarnpkg.com/classnames/-/classnames-2.2.6.tgz#43935bffdd291f326dad0a205309b38d00f650ce"
+
 clean-css@4.1.x:
   version "4.1.11"
   resolved "https://registry.yarnpkg.com/clean-css/-/clean-css-4.1.11.tgz#2ecdf145aba38f54740f26cefd0ff3e03e125d6a"