diff --git a/drivers/net/wan/c101.c b/drivers/net/wan/c101.c
index cb57f9124ab1..c354a5143e99 100644
--- a/drivers/net/wan/c101.c
+++ b/drivers/net/wan/c101.c
@@ -4,7 +4,7 @@
  *
  * Copyright (C) 2000-2003 Krzysztof Halasa <khc@pm.waw.pl>
  *
- * For information see <http://www.kernel.org/pub/linux/utils/net/hdlc/>
+ * For information see <https://www.kernel.org/pub/linux/utils/net/hdlc/>
  *
  * Sources of information:
  *    Hitachi HD64570 SCA User's Manual
diff --git a/drivers/net/wan/n2.c b/drivers/net/wan/n2.c
index f9e7fc7e9978..5bf4463873b1 100644
--- a/drivers/net/wan/n2.c
+++ b/drivers/net/wan/n2.c
@@ -4,7 +4,7 @@
  *
  * Copyright (C) 1998-2003 Krzysztof Halasa <khc@pm.waw.pl>
  *
- * For information see <http://www.kernel.org/pub/linux/utils/net/hdlc/>
+ * For information see <https://www.kernel.org/pub/linux/utils/net/hdlc/>
  *
  * Note: integrated CSU/DSU/DDS are not supported by this driver
  *
diff --git a/drivers/net/wan/pc300too.c b/drivers/net/wan/pc300too.c
index 190735604b2e..001fd378d417 100644
--- a/drivers/net/wan/pc300too.c
+++ b/drivers/net/wan/pc300too.c
@@ -4,7 +4,7 @@
  *
  * Copyright (C) 2000-2008 Krzysztof Halasa <khc@pm.waw.pl>
  *
- * For information see <http://www.kernel.org/pub/linux/utils/net/hdlc/>.
+ * For information see <https://www.kernel.org/pub/linux/utils/net/hdlc/>.
  *
  * Sources of information:
  *    Hitachi HD64572 SCA-II User's Manual
diff --git a/drivers/net/wan/pci200syn.c b/drivers/net/wan/pci200syn.c
index b5f8aaca5f06..d0062224b216 100644
--- a/drivers/net/wan/pci200syn.c
+++ b/drivers/net/wan/pci200syn.c
@@ -4,7 +4,7 @@
  *
  * Copyright (C) 2002-2008 Krzysztof Halasa <khc@pm.waw.pl>
  *
- * For information see <http://www.kernel.org/pub/linux/utils/net/hdlc/>
+ * For information see <https://www.kernel.org/pub/linux/utils/net/hdlc/>
  *
  * Sources of information:
  *    Hitachi HD64572 SCA-II User's Manual