diff --git a/requirements.txt b/requirements.txt
index d4475fa..74d1dd2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,4 +4,5 @@ bitstring
 autobahn
 jinja2==2.11.3
 MarkupSafe==2.0.1
+pyOpenSSL==23.1.1
 service-identity==21.1.0