diff --git a/app/src/main/java/com/nextcloud/talk/utils/TextMatchers.java b/app/src/main/java/com/nextcloud/talk/utils/TextMatchers.java
index d04f657ba..bf2e17a48 100644
--- a/app/src/main/java/com/nextcloud/talk/utils/TextMatchers.java
+++ b/app/src/main/java/com/nextcloud/talk/utils/TextMatchers.java
@@ -1,5 +1,32 @@
-package com.nextcloud.talk.utils;
+/*
+ * Nextcloud Talk application
+ *
+ * @author Mario Danic
+ * @author Tim Krüger
+ * @author Andy Scherzinger
+ * @author Samanwith KSN
+ * Copyright (C) 2023 Samanwith KSN <lcb2021048@iiitl.com>
+ * Copyright (C) 2022 Andy Scherzinger <info@andy-scherzinger.de>
+ * Copyright (C) 2021 Tim Krüger <t@timkrueger.me>
+ * Copyright (C) 2017-2018 Mario Danic <mario@lovelyhq.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Partly based on https://github.com/kevalpatel2106/EmoticonGIFKeyboard/blob/master/emoticongifkeyboard/src/main/java/com/kevalpatel2106/emoticongifkeyboard/internal/emoticon/EmoticonUtils.java
+ */
 
+package com.nextcloud.talk.utils;
 
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;