diff --git a/examples/opusfile_example.c b/examples/opusfile_example.c
index f47ed89ca5934b91dd10a5c20e9ee0fa9681e34f..88ba6aad130f6f48f8f30307b28c4512020038c2 100644
--- a/examples/opusfile_example.c
+++ b/examples/opusfile_example.c
@@ -5,7 +5,7 @@
  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
  *                                                                  *
- * THE libopusfile SOURCE CODE IS (C) COPYRIGHT 1994-2012           *
+ * THE libopusfile SOURCE CODE IS (C) COPYRIGHT 1994-2020           *
  * by the Xiph.Org Foundation and contributors https://xiph.org/    *
  *                                                                  *
  ********************************************************************/
diff --git a/examples/seeking_example.c b/examples/seeking_example.c
index 6c3d758cf34060bf964db5999885a7f4aa581aa2..a72d2e746ddc2f17968abbfa69f46d64bc571e5a 100644
--- a/examples/seeking_example.c
+++ b/examples/seeking_example.c
@@ -5,7 +5,7 @@
  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
  *                                                                  *
- * THE libopusfile SOURCE CODE IS (C) COPYRIGHT 1994-2012           *
+ * THE libopusfile SOURCE CODE IS (C) COPYRIGHT 1994-2020           *
  * by the Xiph.Org Foundation and contributors https://xiph.org/    *
  *                                                                  *
  ********************************************************************/
diff --git a/examples/win32utf8.c b/examples/win32utf8.c
index dd3f3dff81bb0c6c75f32db26908e752fad945f3..1246b21b753558cded696a2bb1ccc4bd7bdb7181 100644
--- a/examples/win32utf8.c
+++ b/examples/win32utf8.c
@@ -1,3 +1,15 @@
+/********************************************************************
+ *                                                                  *
+ * THIS FILE IS PART OF THE libopusfile SOFTWARE CODEC SOURCE CODE. *
+ * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
+ * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
+ * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
+ *                                                                  *
+ * THE libopusfile SOURCE CODE IS (C) COPYRIGHT 1994-2020           *
+ * by the Xiph.Org Foundation and contributors https://xiph.org/    *
+ *                                                                  *
+ ********************************************************************/
+
 #if defined(_WIN32)
 # include <stdio.h>
 # include <stdlib.h>
diff --git a/examples/win32utf8.h b/examples/win32utf8.h
index 7f991719203407a0cf21a59fcda1f3abfa2fc16f..02598237708d224cf198e0c1cb2a7cbba6761ec9 100644
--- a/examples/win32utf8.h
+++ b/examples/win32utf8.h
@@ -1,3 +1,15 @@
+/********************************************************************
+ *                                                                  *
+ * THIS FILE IS PART OF THE libopusfile SOFTWARE CODEC SOURCE CODE. *
+ * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
+ * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
+ * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
+ *                                                                  *
+ * THE libopusfile SOURCE CODE IS (C) COPYRIGHT 1994-2020           *
+ * by the Xiph.Org Foundation and contributors https://xiph.org/    *
+ *                                                                  *
+ ********************************************************************/
+
 #if !defined(_win32utf8_H)
 # define _win32utf8_H (1)
 # if defined(_WIN32)
diff --git a/src/http.c b/src/http.c
index c52f0c0621f90bc43f7abea35557661729cbeda8..bd0856270a2108db175f4c00508e221e616801dd 100644
--- a/src/http.c
+++ b/src/http.c
@@ -5,7 +5,7 @@
  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
  *                                                                  *
- * THE libopusfile SOURCE CODE IS (C) COPYRIGHT 2012                *
+ * THE libopusfile SOURCE CODE IS (C) COPYRIGHT 2012-2020           *
  * by the Xiph.Org Foundation and contributors https://xiph.org/    *
  *                                                                  *
  ********************************************************************/
diff --git a/src/info.c b/src/info.c
index 467a503817af4a22692b1bd3dce7a5fa6a97274b..000c74b360ed56e12a22d080798b60f4f3c23295 100644
--- a/src/info.c
+++ b/src/info.c
@@ -5,7 +5,7 @@
  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
  *                                                                  *
- * THE libopusfile SOURCE CODE IS (C) COPYRIGHT 2012                *
+ * THE libopusfile SOURCE CODE IS (C) COPYRIGHT 2012-2020           *
  * by the Xiph.Org Foundation and contributors https://xiph.org/    *
  *                                                                  *
  ********************************************************************/
diff --git a/src/internal.c b/src/internal.c
index 2b3e9379d9bc758411f2c385bad5fb0dc7062827..81c9c379494fda745cbb518315eae80bb207c3dc 100644
--- a/src/internal.c
+++ b/src/internal.c
@@ -5,7 +5,7 @@
  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
  *                                                                  *
- * THE libopusfile SOURCE CODE IS (C) COPYRIGHT 2012                *
+ * THE libopusfile SOURCE CODE IS (C) COPYRIGHT 2012-2020           *
  * by the Xiph.Org Foundation and contributors https://xiph.org/    *
  *                                                                  *
  ********************************************************************/
diff --git a/src/internal.h b/src/internal.h
index 82304714e19e7b9fbb332cfa60ca8872d5b5d020..0c2d2bb30971325945c70baaaec469cb99f911cb 100644
--- a/src/internal.h
+++ b/src/internal.h
@@ -5,7 +5,7 @@
  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
  *                                                                  *
- * THE libopusfile SOURCE CODE IS (C) COPYRIGHT 2012                *
+ * THE libopusfile SOURCE CODE IS (C) COPYRIGHT 2012-2020           *
  * by the Xiph.Org Foundation and contributors https://xiph.org/    *
  *                                                                  *
  ********************************************************************/
diff --git a/src/opusfile.c b/src/opusfile.c
index 10ef680f51fe30eee87b1659000c6686213e7cb0..642c78478ba1644c04974a0980250f5d6816acb6 100644
--- a/src/opusfile.c
+++ b/src/opusfile.c
@@ -5,7 +5,7 @@
  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
  *                                                                  *
- * THE libopusfile SOURCE CODE IS (C) COPYRIGHT 1994-2012           *
+ * THE libopusfile SOURCE CODE IS (C) COPYRIGHT 1994-2020           *
  * by the Xiph.Org Foundation and contributors https://xiph.org/    *
  *                                                                  *
  ********************************************************************
diff --git a/src/stream.c b/src/stream.c
index fe362d04a920a461a1b1bc9391f32c3315fd436b..6559e1dbc443e48a743b6a1726371412502fa4b3 100644
--- a/src/stream.c
+++ b/src/stream.c
@@ -5,7 +5,7 @@
  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
  *                                                                  *
- * THE libopusfile SOURCE CODE IS (C) COPYRIGHT 1994-2012           *
+ * THE libopusfile SOURCE CODE IS (C) COPYRIGHT 1994-2018           *
  * by the Xiph.Org Foundation and contributors https://xiph.org/    *
  *                                                                  *
  ********************************************************************
diff --git a/src/wincerts.c b/src/wincerts.c
index db51ba4cf2374e8eb390b5936747bc99e33e6fe2..409a4e09652d133e4796d1af027e2a1a3532de40 100644
--- a/src/wincerts.c
+++ b/src/wincerts.c
@@ -5,7 +5,7 @@
  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
  *                                                                  *
- * THE libopusfile SOURCE CODE IS (C) COPYRIGHT 2013                *
+ * THE libopusfile SOURCE CODE IS (C) COPYRIGHT 2013-2016           *
  * by the Xiph.Org Foundation and contributors https://xiph.org/    *
  *                                                                  *
  ********************************************************************/
diff --git a/src/winerrno.h b/src/winerrno.h
index 4b448ceb38f4bf0d130af27f2db2ab3c8e2cc5d6..a5177428db805bc855f117a6e6f55c463416b518 100644
--- a/src/winerrno.h
+++ b/src/winerrno.h
@@ -5,7 +5,7 @@
  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
  *                                                                  *
- * THE libopusfile SOURCE CODE IS (C) COPYRIGHT 2012                *
+ * THE libopusfile SOURCE CODE IS (C) COPYRIGHT 2012-2013           *
  * by the Xiph.Org Foundation and contributors https://xiph.org/    *
  *                                                                  *
  ********************************************************************/