diff --git a/src/server_enrollment.py b/src/server_enrollment.py
index 046659f..87f1cfb 100644
--- a/src/server_enrollment.py
+++ b/src/server_enrollment.py
@@ -731,7 +731,7 @@ def enroll_and_sync_license_ws(
             ssl_context.check_hostname = False
             ssl_context.verify_mode = ssl.CERT_NONE
         elif master_root_ca_pem:
-            ssl_context.load_verify_locations(cdata=master_root_ca_pem)
+            ssl_context.load_verify_locations(cadata=master_root_ca_pem)
         else:
             upstream_path = os.path.join(cert_dir, "upstream_ca.crt")
             if os.path.exists(upstream_path):
@@ -945,7 +945,7 @@ def renew_ca_cert_mtls(
                 ssl_ctx.check_hostname = False
                 ssl_ctx.verify_mode = ssl.CERT_NONE
             elif upstream_ca_pem:
-                ssl_ctx.load_verify_locations(cdata=upstream_ca_pem)
+                ssl_ctx.load_verify_locations(cadata=upstream_ca_pem)
             upstream_ca_path = os.path.join(cert_dir, "upstream_ca.crt")
             if os.path.exists(upstream_ca_path) and verify_tls and not upstream_ca_pem:
                 ssl_ctx.load_verify_locations(cafile=upstream_ca_path)