diff --git a/requirements.txt b/requirements.txt
index 8ecdc50..3e1631b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,7 +30,7 @@ pyasn1-modules==0.4.1
     # via service-identity
 pycparser==2.22
     # via cffi
-pycryptodome==3.20.0
+pycryptodome==3.21.0
     # via pproxy
 pylsqpack==0.3.18
     # via aioquic