diff --git a/README.md b/README.md
index 5333230..95396cc 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,14 @@
 # plasp—Translate PDDL to ASP
 
-`plasp` is in early development and not intended for productive use.
+`plasp` 3 is in early development and not intended for productive use yet.
+
+Please get in touch with [Patrick Lühne](https://www.luehne.de) if you have any suggestions.
 
 ## Contributors
 
-* [Patrick Lühne](https://www.luehne.de)
+* [Patrick Lühne](https://www.luehne.de) (plasp 3)
+
+### Earlier Versions
+
+* Murat Knecht (plasp)
+* René Knaebel (plasp 2)