diff --git a/package-lock.json b/package-lock.json
index 12c2a50..dc638d0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
     "name": "react-example",
-    "version": "0.3.0",
+    "version": "0.4.0",
     "lockfileVersion": 2,
     "requires": true,
     "packages": {
         "": {
             "name": "react-example",
-            "version": "0.3.0",
+            "version": "0.4.0",
             "license": "GPL-3.0-or-later",
             "dependencies": {
                 "prop-types": "15.8.1",
diff --git a/package.json b/package.json
index 64bdd98..b222ab0 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
     "private": true,
     "name": "react-example",
     "description": "React.js example",
-    "version": "0.3.0",
+    "version": "0.4.0",
     "main": "index.js",
     "keywords": [
         "react",