diff --git a/PIL/IcoImagePlugin.py b/PIL/IcoImagePlugin.py
index 0b8f4691c..4aa7687af 100644
--- a/PIL/IcoImagePlugin.py
+++ b/PIL/IcoImagePlugin.py
@@ -18,7 +18,7 @@
 # https://code.google.com/p/casadebender/wiki/Win32IconImagePlugin
 #
 # Icon format references:
-#   * http://en.wikipedia.org/wiki/ICO_(file_format)
+#   * https://en.wikipedia.org/wiki/ICO_(file_format)
 #   * http://msdn.microsoft.com/en-us/library/ms997538.aspx
 
 
diff --git a/PIL/SpiderImagePlugin.py b/PIL/SpiderImagePlugin.py
index 0ce63002b..d5457893c 100644
--- a/PIL/SpiderImagePlugin.py
+++ b/PIL/SpiderImagePlugin.py
@@ -27,10 +27,10 @@
 # image data from electron microscopy and tomography.
 #
 # Spider home page:
-# http://www.wadsworth.org/spider_doc/spider/docs/spider.html
+# http://spider.wadsworth.org/spider_doc/spider/docs/spider.html
 #
 # Details about the Spider image format:
-# http://www.wadsworth.org/spider_doc/spider/docs/image_doc.html
+# http://spider.wadsworth.org/spider_doc/spider/docs/image_doc.html
 #
 
 from __future__ import print_function