diff --git a/matrix-synapse.spec b/matrix-synapse.spec
index 1728734..95544ba 100644
--- a/matrix-synapse.spec
+++ b/matrix-synapse.spec
@@ -79,6 +79,9 @@ the ecosystem.
 %prep
 %autosetup -p1 -n %{srcname}-%{ghversion}%{rcx}
 
+# Worlaround fedora not having the right version of python crypto yet.
+sed --debug -i "s/cryptography>=3.4.7;python_version>='3.6'/cryptography>=3.2.1/" synapse/python_dependencies.py
+
 # We don't support the built-in client so remove all the bundled JS.
 rm -rf synapse/static