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-rw-r--r--docs/hazmat/backends/openssl.rst4
1 files changed, 3 insertions, 1 deletions
diff --git a/docs/hazmat/backends/openssl.rst b/docs/hazmat/backends/openssl.rst
index d6351c9c..547fe769 100644
--- a/docs/hazmat/backends/openssl.rst
+++ b/docs/hazmat/backends/openssl.rst
@@ -3,7 +3,9 @@
OpenSSL Backend
===============
-The `OpenSSL`_ C library.
+The `OpenSSL`_ C library. Cryptography supports version ``0.9.8e`` (present in
+Red Hat Enterprise Linux 5) and greater. Earlier versions may work but are
+**not tested or supported**.
.. data:: cryptography.hazmat.backends.openssl.backend