diff --git a/README.md b/README.md
index 672dec5..582a0bb 100644
--- a/README.md
+++ b/README.md
@@ -24,6 +24,14 @@ apply to negative results as well.
 The API is explained in greater detail at the
 [Libravar wiki](https://wiki.libravatar.org/api/).
 
+### Not supported
+
+* OpenID
+  * Because it isn't possible to store filenames with '/' in it on most filesystems.
+* The default actions monsterid, wavatar and retro
+  * Because I don't think anyone uses them?
+  * Patches welcome
+
 ## Usage
 
 Install nginx and