diff --git a/constraints/minimum.txt b/constraints/minimum.txt
index 3fd2d834..a60d61b2 100644
--- a/constraints/minimum.txt
+++ b/constraints/minimum.txt
@@ -14,4 +14,4 @@ packaging>=21.0
 
 # data-yahoo / data-cn transitives: keep a working TLS stack.
 pyOpenSSL>=26.4.0
-cryptography<50.0.0
+cryptography<51.0.0