diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index abab6ae9..7bc005bf 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -127,7 +127,8 @@ Committing
 You MUST ensure that all commits pass all tests and do not have extra
 Dialyzer warnings.
 
-Running tests is fairly straightforward.
+Running tests is fairly straightforward. Note that you need at least
+Erlang/OTP R16B01 for the SSL tests to run.
 
 ``` bash
 make tests