diff --git a/README.md b/README.md
index 56bc22815..ebf4b3bae 100644
--- a/README.md
+++ b/README.md
@@ -41,8 +41,8 @@ The language specification can be found [here](lama-spec.pdf).
 Prerequisites:
 
 * gcc-multilib
-* ocaml [http://ocaml.org]
-* opam [http://opam.ocaml.org]
+* ocaml (>= 4.07.1) [http://ocaml.org]
+* opam (>= 2.0.4) [http://opam.ocaml.org]
 
 Installing: