diff --git a/dendrite-config.yaml b/dendrite-config.yaml
index 1e92f0fd..cb768a10 100644
--- a/dendrite-config.yaml
+++ b/dendrite-config.yaml
@@ -11,7 +11,7 @@ matrix:
     # The path to the PEM formatted matrix private key.
     private_key: "/etc/dendrite/matrix_key.pem"
     # The x509 certificates used by the federation listeners for this server
-    federation_certificates: ["/etc/dendrite/server.pem"]
+    federation_certificates: ["/etc/dendrite/server.crt"]
     # The list of identity servers trusted to verify third party identifiers by this server.
     # Defaults to no trusted servers.
     trusted_third_party_id_servers: