diff --git a/.travis.yml b/.travis.yml
index 3186ea1c..9f760806 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -39,7 +39,7 @@ matrix:
 
 before_install:
 - bash .install_mongodb_on_travis.sh
-- sleep 15  # https://docs.travis-ci.com/user/database-setup/#MongoDB-does-not-immediately-accept-connections
+- sleep 20  # https://docs.travis-ci.com/user/database-setup/#mongodb-does-not-immediately-accept-connections
 - mongo --eval 'db.version();'
 
 install: