diff --git a/tensorboard/pip_package/requirements.txt b/tensorboard/pip_package/requirements.txt
index de7f1340e0..3176d9b0fe 100644
--- a/tensorboard/pip_package/requirements.txt
+++ b/tensorboard/pip_package/requirements.txt
@@ -26,7 +26,6 @@ numpy >= 1.12.0
 protobuf >= 3.6.0
 requests >= 2.21.0, < 3
 setuptools >= 41.0.0
-six >= 1.10.0
 tensorboard-plugin-wit >= 1.6.0
 werkzeug >= 0.11.15
 # python3 specifically requires wheel 0.26