diff --git a/.evergreen/ocsp/mock-ocsp-responder-requirements.txt b/.evergreen/ocsp/mock-ocsp-responder-requirements.txt
index 24e947601..f377753be 100644
--- a/.evergreen/ocsp/mock-ocsp-responder-requirements.txt
+++ b/.evergreen/ocsp/mock-ocsp-responder-requirements.txt
@@ -4,6 +4,6 @@ flask==2.2.5
 itsdangerous==2.1.2
 Jinja2==3.1.6
 MarkupSafe==2.1.4
-oscrypto==1.3.0
+git+https://github.com/wbond/oscrypto.git@d5f3437
 waitress==3.0.2
 Werkzeug==3.0.6