diff --git a/Copyright b/Copyright
index 9fbb964171..55765d6916 100644
--- a/Copyright
+++ b/Copyright
@@ -223,7 +223,7 @@ x   player/command.c                extremely hard (also some GPL-only things)
 x   player/command.h                hard
 x   player/configfiles.c            unknown
 x   player/core.h                   extremely hard
-x   player/external_files.*         hard (murky subreader.c origins)
+    player/external_files.*         LGPL
     player/lavfi.*                  LGPL
 x   player/loadfile.c               extremely hard
     player/lua/*.*                  LGPL
diff --git a/player/external_files.c b/player/external_files.c
index 131e526f10..68d0915c6c 100644
--- a/player/external_files.c
+++ b/player/external_files.c
@@ -1,18 +1,18 @@
 /*
  * This file is part of mpv.
  *
- * mpv 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 2 of the License, or
- * (at your option) any later version.
+ * mpv is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
  *
  * mpv 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.
+ * GNU Lesser General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License along
- * with mpv.  If not, see <http://www.gnu.org/licenses/>.
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with mpv.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #include <dirent.h>
@@ -32,9 +32,9 @@
 #include "options/path.h"
 #include "external_files.h"
 
-static const char *const sub_exts[] = {"utf", "utf8", "utf-8", "idx", "sub", "srt",
-                                       "smi", "rt", "ssa", "aqt", "jss",
-                                       "js", "ass", "mks", "vtt", "sup", "scc",
+static const char *const sub_exts[] = {"utf", "utf8", "utf-8", "idx", "sub",
+                                       "srt", "rt", "ssa", "ass", "mks", "vtt",
+                                       "sup", "scc",
                                        NULL};
 
 static const char *const audio_exts[] = {"mp3", "aac", "mka", "dts", "flac",
diff --git a/player/external_files.h b/player/external_files.h
index 223bf06e86..7d7d751332 100644
--- a/player/external_files.h
+++ b/player/external_files.h
@@ -1,18 +1,18 @@
 /*
  * This file is part of mpv.
  *
- * mpv 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 2 of the License, or
- * (at your option) any later version.
+ * mpv is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
  *
  * mpv 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.
+ * GNU Lesser General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License along
- * with mpv.  If not, see <http://www.gnu.org/licenses/>.
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with mpv.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #ifndef MPLAYER_FIND_SUBFILES_H