diff --git a/html/src/app.dark.scss b/html/src/app.dark.scss
index 703d9678..0db4be9c 100644
--- a/html/src/app.dark.scss
+++ b/html/src/app.dark.scss
@@ -1,7 +1,7 @@
 @charset "utf-8";
 
 //
-// Copyright(c) 2019-2020 pypy and individual contributors.
+// Copyright(c) 2019-2021 pypy and individual contributors.
 // All rights reserved.
 //
 // This work is licensed under the terms of the MIT license.
diff --git a/html/src/app.js b/html/src/app.js
index 1f2776c5..1ec4c157 100644
--- a/html/src/app.js
+++ b/html/src/app.js
@@ -1,4 +1,4 @@
-// Copyright(c) 2019-2020 pypy and individual contributors.
+// Copyright(c) 2019-2021 pypy and individual contributors.
 // All rights reserved.
 //
 // This work is licensed under the terms of the MIT license.
diff --git a/html/src/app.scss b/html/src/app.scss
index 7e54c613..299657d8 100644
--- a/html/src/app.scss
+++ b/html/src/app.scss
@@ -1,7 +1,7 @@
 @charset "utf-8";
 
 //
-// Copyright(c) 2019-2020 pypy and individual contributors.
+// Copyright(c) 2019-2021 pypy and individual contributors.
 // All rights reserved.
 //
 // This work is licensed under the terms of the MIT license.
diff --git a/html/src/index.pug b/html/src/index.pug
index 69b2640f..46ec7634 100644
--- a/html/src/index.pug
+++ b/html/src/index.pug
@@ -42,7 +42,7 @@ html
                             el-form-item
                                 el-button(:loading="loginForm.loading" style="width:100%" @click="loginWithSteam()") Login with Steam
                         div(style="text-align:center;font-size:12px")
-                            p © 2019-2020 #[a(href="https://github.com/pypy-vrc" target="_blank") pypy] (mina#5656)
+                            p © 2019-2021 #[a(href="https://github.com/pypy-vrc" target="_blank") pypy] (mina#5656)
                             p VRCX is an assistant application for provide information about manage friendship. this application uses unofficial VRChat API (VRCSDK).
                             p VRCX isn't endorsed by VRChat and doesn't reflect the views or opinions of VRChat or anyone officially involved in producing or managing VRChat. VRChat is trademark of VRChat Inc. VRChat © VRChat Inc.
                             p pypy is not responsible for any problems caused by VRCX. Use at your own risk!
@@ -654,7 +654,7 @@ html
                 div.options-container(style="margin-top:45px;border-top:1px solid #eee;padding-top:30px")
                     span.header Legal Notice
                     div.options-container-item
-                        p © 2019-2020 #[a(href="https://github.com/pypy-vrc" target="_blank") pypy] (mina#5656)
+                        p © 2019-2021 #[a(href="https://github.com/pypy-vrc" target="_blank") pypy] (mina#5656)
                         p VRCX is an assistant application for provide information about manage friendship. this application uses unofficial VRChat API (VRCSDK).
                         p VRCX isn't endorsed by VRChat and doesn't reflect the views or opinions of VRChat or anyone officially involved in producing or managing VRChat. VRChat is trademark of VRChat Inc. VRChat © VRChat Inc.
                         p pypy is not responsible for any problems caused by VRCX. Use at your own risk!
diff --git a/html/src/vr.js b/html/src/vr.js
index 0f7dab6f..e86413a9 100644
--- a/html/src/vr.js
+++ b/html/src/vr.js
@@ -1,4 +1,4 @@
-// Copyright(c) 2019-2020 pypy and individual contributors.
+// Copyright(c) 2019-2021 pypy and individual contributors.
 // All rights reserved.
 //
 // This work is licensed under the terms of the MIT license.
diff --git a/html/src/vr.scss b/html/src/vr.scss
index ab67c133..527c7ebf 100644
--- a/html/src/vr.scss
+++ b/html/src/vr.scss
@@ -1,7 +1,7 @@
 @charset "utf-8";
 
 //
-// Copyright(c) 2019-2020 pypy and individual contributors.
+// Copyright(c) 2019-2021 pypy and individual contributors.
 // All rights reserved.
 //
 // This work is licensed under the terms of the MIT license.