diff --git a/pyproject.toml b/pyproject.toml
index 6c5577ed18..00fd2c97a1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -85,7 +85,7 @@ dependencies = [
         'text-unidecode==1.*',
         'protobuf==5.28.*',
         'cryptography>=3.4.2',
-        'pycryptodome==3.20.*',
+        'pycryptodome==3.21.*',
         'sepaxml==2.6.*',
         'geoip2==4.*',
         'sendgrid==6.11.*',