diff --git a/docs/requirements-docs.txt b/docs/requirements-docs.txt
index d1c4d014..270658af 100644
--- a/docs/requirements-docs.txt
+++ b/docs/requirements-docs.txt
@@ -10,4 +10,4 @@ sphinx-markdown-tables
 sphinx-rtd-theme
 
 # pin tokenizers version to avoid env_logger version req
-tokenizers==0.19.1
+tokenizers==0.21.2