diff --git a/proxy/include/proxy/default_cert.hpp b/proxy/include/proxy/default_cert.hpp
index 13c60f520..f6e8aa9b9 100644
--- a/proxy/include/proxy/default_cert.hpp
+++ b/proxy/include/proxy/default_cert.hpp
@@ -14,7 +14,7 @@
 inline std::string_view default_root_certificates()
 {
 	// from https://curl.se/docs/caextract.html
-	// xxd -i cacert-2023-12-12.pem
+	// usage: xxd -i cacert-2023-12-12.pem
 	static const unsigned char cacert_2023_12_12_pem[] = {
 		0x23, 0x23, 0x0a, 0x23, 0x23, 0x20, 0x42, 0x75, 0x6e, 0x64, 0x6c, 0x65,
 		0x20, 0x6f, 0x66, 0x20, 0x43, 0x41, 0x20, 0x52, 0x6f, 0x6f, 0x74, 0x20,