diff --git a/README.md b/README.md
index 07c286c..788fc16 100644
--- a/README.md
+++ b/README.md
@@ -79,7 +79,7 @@ In order to enable built-in HTTPS support, add the `--tls-cert-path` option to s
 
 Once HTTPS is enabled, HTTP connections will not be accepted.
 
-A sample self-signed certificate [`localhost.p12`](localhost.p12) can be used for testing.
+A sample self-signed certificate [`localhost.p12`]([localhost.p12](https://github.com/jedisct1/rust-doh/raw/master/localhost.p12)) can be used for testing.
 
 ## Accepting both DNSCrypt and DoH connections on port 443