diff --git a/.github/workflows/deploy_public.yml b/.github/workflows/deploy_public.yml
index 3ab7f01..affa9c3 100644
--- a/.github/workflows/deploy_public.yml
+++ b/.github/workflows/deploy_public.yml
@@ -43,8 +43,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          python -m pip install build sphinx==5.3.0 pydata_sphinx_theme==0.11.0
-          python -m pip install --upgrade myst_parser<2.0
+          python -m pip install build sphinx==5.3.0 pydata_sphinx_theme==0.11.0 myst_parser
 
       - name: Get new version number from input
         id: version_number
diff --git a/tox.ini b/tox.ini
index 85f0bbb..d1d0df9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,5 +17,5 @@ changedir = docs
 deps =
     sphinx==5.3.0
     pydata_sphinx_theme==0.11.0
-    myst_parser<2.0
+    myst_parser < 2.0
 commands = sphinx-build -W -b html -d {envtmpdir}/doctrees . {envtmpdir}/html