diff --git a/doc/requirements.txt b/doc/requirements.txt
index 23b871f..a61c706 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,4 +1,4 @@
 sphinx>=2.0.0,!=2.1.0 # BSD
-otcdocstheme>=1.0.0 # Apache-2.0
+otcdocstheme # Apache-2.0
 # releasenotes
 reno>=3.1.0 # Apache-2.0