Fix missing documentation dependency
diff --git a/docs/requirements-docs.txt b/docs/requirements-docs.txt
index aa96755..8dabaf9 100644
--- a/docs/requirements-docs.txt
+++ b/docs/requirements-docs.txt
@@ -1,3 +1,4 @@
 sphinx-docstring-typing
 urllib3
 requests
+requests-oauthlib