diff --git a/DEPENDS.txt b/DEPENDS.txt
index 578815bf..38d394b0 100644
--- a/DEPENDS.txt
+++ b/DEPENDS.txt
@@ -14,7 +14,7 @@ Optional Requirements
You can use this scikit with the basic requirements listed above, but some
functionality is only available with the following installed:
-`Open CV `_ (>= 2.0).
+`Open CV `_ (version 2.1).
Required for functions in ``scikits.image.opencv``.
`PyQt4 `_