diff --git a/.github/workflows/python-publish.yml b/.github/workflows/python-publish.yml
index 419adaa..f589101 100644
--- a/.github/workflows/python-publish.yml
+++ b/.github/workflows/python-publish.yml
@@ -29,7 +29,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install flake8 pytest sphinx sphinx-rtd-theme
+        pip install flake8 pytest
         pip install -r requirements.txt
         pip install build
     - name: Lint with flake8
diff --git a/docs/conf.py b/docs/conf.py
index 5b99d4e..85c387b 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -30,7 +30,7 @@
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = ['sphinx.ext.todo', 'sphinx.ext.viewcode', 'sphinx.ext.autodoc']
+extensions = ['sphinx.ext.todo', 'sphinx.ext.viewcode', 'sphinx.ext.autodoc', 'sphinx_rtd_theme']
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
diff --git a/requirements.txt b/requirements.txt
index 75baef3..f6aa974 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,5 +6,5 @@ PyYAML
 six
 tzdata
 sphinx
-sphinx-rtd-theme
+sphinx_rtd_theme
 -e .
\ No newline at end of file
diff --git a/requirements_dev.txt b/requirements_dev.txt
index 0aeac65..2ebffcc 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -6,7 +6,7 @@ PyYAML
 six
 tzdata
 sphinx
-sphinx-rtd-theme
+sphinx_rtd_theme
 
 # dev requirements -
 pytest
diff --git a/setup.cfg b/setup.cfg
index 572d22d..09fbd69 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -18,7 +18,7 @@ install_requires =
     six
     tzdata
     sphinx
-    sphinx-rtd-theme
+    sphinx_rtd_theme
 python_requires = >=3.8
 
 [options.extras_require]