diff --git a/requirements/docs-lint.txt b/requirements/docs-lint.txt
index 8da3aaaa6a6..e861632b610 100644
--- a/requirements/docs-lint.txt
+++ b/requirements/docs-lint.txt
@@ -1,2 +1,5 @@
-Sphinx==2.0.0
+# Use <2.x until we fix some issues in our theme.
+# Some things are not rendering properly and sidebar shows titles in gray.
+Sphinx==1.8.5  # pyup: <2.0.0
+
 rstcheck==3.3.1