diff --git a/example/Readme.md b/example/Readme.md
new file mode 100644
index 00000000..f8785233
--- /dev/null
+++ b/example/Readme.md
@@ -0,0 +1,7 @@
+# About the certificate
+
+Yes, this folder contains a private key and a certificate for quic.clemente.io.
+
+Unfortunately we need a valid certificate for the integration tests with Chrome and `quic_client`. No important data is served on the "real" `quic.clemente.io` (only a test page), and the MITM problem is imho negligible.
+
+If you figure out a way to test with Chrome without having a cert and key here, let us now in an issue.