diff --git a/.travis.yml b/.travis.yml
index fec2d5e882ea82c578c49e8a83fd314d93b6dc0d..76471a65934b2a531e91a49d702a3c2d16cd416e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -49,6 +49,6 @@ script:
   # Now build ngtcp2 examples and test
   - make
   - make check
-  - make ci/gen-certificate.sh
+  - ./ci/gen-certificate.sh
   - ./examples/server localhost 4433 cert/server.key cert/server.crt &
   - ./examples/client localhost 4433