diff --git a/frontend/src/locales/bg.po b/frontend/src/locales/bg.po
index ac85d264b..ebbf64230 100644
--- a/frontend/src/locales/bg.po
+++ b/frontend/src/locales/bg.po
@@ -2,7 +2,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: \n"
 "Language: bg\n"
-"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Type: text/plain; charset=utf-8\n"
 "Content-Transfer-Encoding: 8bit\n"
 "Generated-By: easygettext\n"