diff --git a/README.md b/README.md
index 13dd211..c70263e 100644
--- a/README.md
+++ b/README.md
@@ -2,19 +2,19 @@
 NTSC artifact colors for Apple IIGS
 
 Original:
-![Original](http://github.com/dschmenk/SHR-NTSC/blob/master/images/racecar.JPG)
+![Original](https://github.com/dschmenk/SHR-NTSC/blob/master/images/racecar.JPG)
 
 Double Hi-Res Graphics:
-![Double HiRes]((http://github.com/dschmenk/SHR-NTSC/blob/master/images/racecar-dhgr.JPG)
+![Double HiRes]((https://github.com/dschmenk/SHR-NTSC/blob/master/images/racecar-dhgr.JPG)
 
 Super Hi-Res Graphics mapping 140 pixels:
-![SHR-140]((http://github.com/dschmenk/SHR-NTSC/blob/master/images/racecar-140.JPG)
+![SHR-140]((https://github.com/dschmenk/SHR-NTSC/blob/master/images/racecar-140.JPG)
 
 Super Hi-Res Graphics mapping 160 pixels:
-![SHR-160]((http://github.com/dschmenk/SHR-NTSC/blob/master/images/racecar-160.JPG)
+![SHR-160]((https://github.com/dschmenk/SHR-NTSC/blob/master/images/racecar-160.JPG)
 
 Super Hi-Res Graphics mapping 640 pixels:
-![SHR-640]((http://github.com/dschmenk/SHR-NTSC/blob/master/images/racecar-640.JPG)
+![SHR-640]((https://github.com/dschmenk/SHR-NTSC/blob/master/images/racecar-640.JPG)
 
 Super Hi-Res Graphics mapping 640 pixels with error diffusion:
-![SHR-640-err]((http://github.com/dschmenk/SHR-NTSC/blob/master/images/racecar-640-err.JPG)
+![SHR-640-err]((https://github.com/dschmenk/SHR-NTSC/blob/master/images/racecar-640-err.JPG)