diff --git a/docs/source/user_guide/installation/index.rst b/docs/source/user_guide/installation/index.rst
index c5714d5d5d..84c5de9de3 100644
--- a/docs/source/user_guide/installation/index.rst
+++ b/docs/source/user_guide/installation/index.rst
@@ -117,7 +117,7 @@ Installable with ``pip install "pybamm[docs]"``
 ================================================================================================= ================== ================== =======================================================================
 Dependency                                                                                        Minimum Version    pip extra          Notes
 ================================================================================================= ================== ================== =======================================================================
-`sphinx <https://www.sphinx-doc.org/en/master/>`__                                                1.5.0              docs               Sphinx makes it easy to create intelligent and beautiful documentation.
+`sphinx <https://www.sphinx-doc.org/en/master/>`__                                                \-                 docs               Sphinx makes it easy to create intelligent and beautiful documentation.
 `pydata-sphinx-theme <https://pydata-sphinx-theme.readthedocs.io/en/stable/>`__                   \-                 docs               A clean, Bootstrap-based Sphinx theme.
 `sphinx_design <https://sphinx-design.readthedocs.io/en/latest/>`__                               \-                 docs               A sphinx extension for designing.
 `sphinx-copybutton <https://sphinx-copybutton.readthedocs.io/en/latest/>`__                       \-                 docs               To copy codeblocks.
diff --git a/setup.py b/setup.py
index df55a24325..a16cc84a0d 100644
--- a/setup.py
+++ b/setup.py
@@ -210,8 +210,7 @@ def compile_KLU():
     ],
     extras_require={
         "docs": [
-            "sphinx>=6",
-            "sphinx_rtd_theme>=0.5",
+            "sphinx",
             "pydata-sphinx-theme",
             "sphinx_design",
             "sphinx-copybutton",