diff --git a/ci/deps/travis-36-doc.yaml b/ci/deps/travis-36-doc.yaml
index 8f7556e6b47ad..a3c9f27f72d7e 100644
--- a/ci/deps/travis-36-doc.yaml
+++ b/ci/deps/travis-36-doc.yaml
@@ -44,4 +44,3 @@ dependencies:
   # universal
   - pytest>=4.0.2
   - pytest-xdist
-  - isort