diff --git a/images/README b/images/README
index 1cf8e5c..0891e62 100644
--- a/images/README
+++ b/images/README
@@ -2,4 +2,5 @@ Image Credits
 =============
 dvsup.png, rough_diagonal.png and cross_scratches.png authored by "Cody L.",
 "Jorick van Hees" and "Andrey Ovcharov" respectively; courtesy of
-subtlepatterns.com.
+subtlepatterns.com, licensed under the Creative Commons Attribution 3.0 Unported
+License.