diff --git a/readthedocs/doc_builder/python_environments.py b/readthedocs/doc_builder/python_environments.py
index bf781e43fa7..8306a1e57b0 100644
--- a/readthedocs/doc_builder/python_environments.py
+++ b/readthedocs/doc_builder/python_environments.py
@@ -325,7 +325,7 @@ def install_core_requirements(self):
                     negative='sphinx<2',
                 ),
                 'sphinx-rtd-theme<0.5',
-                'readthedocs-sphinx-ext<0.6',
+                'readthedocs-sphinx-ext<0.7',
             ])
 
         cmd = copy.copy(pip_install_cmd)