diff --git a/requirements.txt b/requirements.txt
index ef13711b1a..0071fac9e2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 # generated from manifests external_dependencies
-cryptography
+cryptography<39
 endesive
 fdfgen
 py3o.formats