diff --git a/src/PIL/ImageCms.py b/src/PIL/ImageCms.py
index 3699095901d..60e700f0905 100644
--- a/src/PIL/ImageCms.py
+++ b/src/PIL/ImageCms.py
@@ -34,9 +34,9 @@
     a Python / PIL interface to the littleCMS ICC Color Management System
     Copyright (C) 2002-2003 Kevin Cazabon
     kevin@cazabon.com
-    http://www.cazabon.com
+    https://www.cazabon.com
 
-    pyCMS home page:  http://www.cazabon.com/pyCMS
+    pyCMS home page:  https://www.cazabon.com/pyCMS
     littleCMS home page:  https://www.littlecms.com
     (littleCMS is Copyright (C) 1998-2001 Marti Maria)
 
diff --git a/src/PIL/ImageOps.py b/src/PIL/ImageOps.py
index f0c932d33a6..b170e9d8cc9 100644
--- a/src/PIL/ImageOps.py
+++ b/src/PIL/ImageOps.py
@@ -439,7 +439,7 @@ def fit(image, size, method=Image.BICUBIC, bleed=0.0, centering=(0.5, 0.5)):
 
     # by Kevin Cazabon, Feb 17/2000
     # kevin@cazabon.com
-    # http://www.cazabon.com
+    # https://www.cazabon.com
 
     # ensure centering is mutable
     centering = list(centering)
diff --git a/src/_imagingcms.c b/src/_imagingcms.c
index 1446bd02b9c..9b5a121d7d3 100644
--- a/src/_imagingcms.c
+++ b/src/_imagingcms.c
@@ -3,14 +3,14 @@
  * a Python / PIL interface to the littleCMS ICC Color Management System
  * Copyright (C) 2002-2003 Kevin Cazabon
  * kevin@cazabon.com
- * http://www.cazabon.com
+ * https://www.cazabon.com
  * Adapted/reworked for PIL by Fredrik Lundh
  * Copyright (c) 2009 Fredrik Lundh
  * Updated to LCMS2
  * Copyright (c) 2013 Eric Soroos
  *
- * pyCMS home page:  http://www.cazabon.com/pyCMS
- * littleCMS home page:  http://www.littlecms.com
+ * pyCMS home page:  https://www.cazabon.com/pyCMS
+ * littleCMS home page:  https://www.littlecms.com
  * (littleCMS is Copyright (C) 1998-2001 Marti Maria)
  *
  * Originally released under LGPL.  Graciously donated to PIL in
@@ -23,7 +23,7 @@ pyCMS\n\
 a Python / PIL interface to the littleCMS ICC Color Management System\n\
 Copyright (C) 2002-2003 Kevin Cazabon\n\
 kevin@cazabon.com\n\
-http://www.cazabon.com\n\
+https://www.cazabon.com\n\
 "
 
 #define PY_SSIZE_T_CLEAN