diff --git a/data/com.github.liferooter.textpieces.appdata.xml.in b/data/com.github.liferooter.textpieces.appdata.xml.in
index 60e0a5a..c122bb1 100644
--- a/data/com.github.liferooter.textpieces.appdata.xml.in
+++ b/data/com.github.liferooter.textpieces.appdata.xml.in
@@ -61,6 +61,16 @@ SPDX-License-Identifier: CC0-1.0
   </screenshots>
   <content_rating type="oars-1.1" />
   <releases>
+    <release version="3.1.0" date="2022-08-04">
+      <description>
+        <p>New features and improvement:</p>
+        <ul>
+          <li>Add style schemes</li>
+          <li>Add search and replace feature to editor</li>
+          <li>Fix some bugs</li>
+        </ul>
+      </description>
+    </release>
     <release version="3.0.2" date="2021-12-16">
       <description>Bug fix</description>
     </release>
diff --git a/meson.build b/meson.build
index 77def8d..fd5fdd3 100644
--- a/meson.build
+++ b/meson.build
@@ -3,7 +3,7 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 project('textpieces', 'vala',
-          version: '3.0.2',
+          version: '3.1.0',
     meson_version: '>= 0.59.0',
   default_options: [ 'warning_level=2',
                    ],
diff --git a/resources/ui/CustomToolPage.ui b/resources/ui/CustomToolPage.ui
index a5e9aa3..3eaa908 100644
--- a/resources/ui/CustomToolPage.ui
+++ b/resources/ui/CustomToolPage.ui
@@ -1,4 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+SPDX-FileCopyrightText: 2022 Gleb Smirnov <glebsmirnov0708@gmail.com>
+
+SPDX-License-Identifier: CC0-1.0
+-->
+
 <interface>
   <requires lib="gtk" version="4.0"/>
   <template class="TextPiecesCustomToolPage" parent="GtkBox">
diff --git a/resources/ui/Editor.ui b/resources/ui/Editor.ui
index fbd0ab2..53c942e 100644
--- a/resources/ui/Editor.ui
+++ b/resources/ui/Editor.ui
@@ -1,4 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+SPDX-FileCopyrightText: 2022 Gleb Smirnov <glebsmirnov0708@gmail.com>
+
+SPDX-License-Identifier: CC0-1.0
+-->
+
 <interface>
   <requires lib="gtk" version="4.0"/>
   <template class="TextPiecesEditor" parent="AdwBin">
diff --git a/resources/ui/NewToolPage.ui b/resources/ui/NewToolPage.ui
index a2be6df..0fa4837 100644
--- a/resources/ui/NewToolPage.ui
+++ b/resources/ui/NewToolPage.ui
@@ -1,4 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+SPDX-FileCopyrightText: 2022 Gleb Smirnov <glebsmirnov0708@gmail.com>
+
+SPDX-License-Identifier: CC0-1.0
+-->
+
 <interface>
   <requires lib="gtk" version="4.0"/>
   <template class="TextPiecesNewToolPage" parent="GtkBox">
diff --git a/resources/ui/Preferences.ui b/resources/ui/Preferences.ui
index 5ad196c..4579290 100644
--- a/resources/ui/Preferences.ui
+++ b/resources/ui/Preferences.ui
@@ -1,4 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+SPDX-FileCopyrightText: 2022 Gleb Smirnov <glebsmirnov0708@gmail.com>
+
+SPDX-License-Identifier: CC0-1.0
+-->
+
 <interface>
   <requires lib="gtk" version="4.0"/>
   <template class="TextPiecesPreferences" parent="AdwPreferencesWindow">
diff --git a/resources/ui/SearchBar.ui b/resources/ui/SearchBar.ui
index f7efc8d..b388df5 100644
--- a/resources/ui/SearchBar.ui
+++ b/resources/ui/SearchBar.ui
@@ -1,4 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+SPDX-FileCopyrightText: 2022 Gleb Smirnov <glebsmirnov0708@gmail.com>
+
+SPDX-License-Identifier: CC0-1.0
+-->
+
 <interface>
   <requires lib="gtk" version="4.0"/>
   <template class="TextPiecesSearchBar" parent="AdwBin">
diff --git a/resources/ui/SearchEntry.ui b/resources/ui/SearchEntry.ui
index d5fb1e6..7c2b016 100644
--- a/resources/ui/SearchEntry.ui
+++ b/resources/ui/SearchEntry.ui
@@ -1,4 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+SPDX-FileCopyrightText: 2022 Gleb Smirnov <glebsmirnov0708@gmail.com>
+
+SPDX-License-Identifier: CC0-1.0
+-->
+
 <interface>
   <requires lib="gtk" version="4.0"/>
   <template class="TextPiecesSearchEntry" parent="GtkWidget">
diff --git a/resources/ui/ShortcutsWindow.ui b/resources/ui/ShortcutsWindow.ui
index 8287ff9..fa5530b 100644
--- a/resources/ui/ShortcutsWindow.ui
+++ b/resources/ui/ShortcutsWindow.ui
@@ -1,4 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+SPDX-FileCopyrightText: 2022 Gleb Smirnov <glebsmirnov0708@gmail.com>
+
+SPDX-License-Identifier: CC0-1.0
+-->
+
 <interface>
   <requires lib="gtk" version="4.0"/>
   <object class="GtkShortcutsWindow" id="help_overlay">
diff --git a/resources/ui/ToolSettings.ui b/resources/ui/ToolSettings.ui
index 175456e..bb2741a 100644
--- a/resources/ui/ToolSettings.ui
+++ b/resources/ui/ToolSettings.ui
@@ -1,4 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+SPDX-FileCopyrightText: 2022 Gleb Smirnov <glebsmirnov0708@gmail.com>
+
+SPDX-License-Identifier: CC0-1.0
+-->
+
 <interface>
   <requires lib="gtk" version="4.0"/>
   <template class="TextPiecesToolSettings" parent="AdwBin">
diff --git a/resources/ui/Window.ui b/resources/ui/Window.ui
index 2d8bcb0..c731040 100644
--- a/resources/ui/Window.ui
+++ b/resources/ui/Window.ui
@@ -1,4 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+SPDX-FileCopyrightText: 2022 Gleb Smirnov <glebsmirnov0708@gmail.com>
+
+SPDX-License-Identifier: CC0-1.0
+-->
+
 <interface>
   <requires lib="gtk" version="4.0"/>
   <template class="TextPiecesWindow" parent="AdwApplicationWindow">