diff --git a/example/tls/certs/ca-config.json b/example/tls/certs/ca-config.json
index dba73de8f..f9e254bc9 100644
--- a/example/tls/certs/ca-config.json
+++ b/example/tls/certs/ca-config.json
@@ -9,7 +9,8 @@
                 "usages": [
                     "signing",
                     "key encipherment",
-                    "server auth"
+                    "server auth",
+                    "client auth"
                 ]
             },
             "client": {