diff --git a/README.md b/README.md
index 4d02e4d..3f7951b 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,10 @@ opm-data
 
 This is the OPM repository which is supposed to contain all relevant
 datasets and simulation results which are required to test the OPM
-simulators thoroughly. It is a private github repository because some
-of these datasets may not be freely redistributable, although none
-them is "secret" in a more strict sense.
+simulators thoroughly.
+
+Decks are now provided under the open database license, and new decks
+should also be provided under the same or a compatible license.
+
+Note that the git history contains proprietary decks (now removed) where
+usage restrictions may apply.
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