diff --git a/vdirsyncer/storage/dav.py b/vdirsyncer/storage/dav.py
index e21e0aa8..e74a8968 100644
--- a/vdirsyncer/storage/dav.py
+++ b/vdirsyncer/storage/dav.py
@@ -391,6 +391,7 @@ def __init__(
         ssl = prepare_verify(verify, verify_fingerprint)
         if ssl:
             self._settings["ssl"] = ssl
+            ssl.load_cert_chain(*self._settings["cert"])
 
         self.useragent = useragent
         self.url = url.rstrip("/") + "/"