python-mario
diff --git a/‎poetry.lock
+8-4 b/‎poetry.lock
+8-4
diff --git a/‎pyproject.toml
+2-2 b/‎pyproject.toml
+2-2
@@ -79,7 +79,7 @@ xmltodict = "0.12.0"
 pyyaml = "5.3.1"
 pyrsistent = "0.16.0"
 sphinx = {version = "2.1.2", optional = true}
-sphinx-rtd-theme = {version = "^0.4.3", optional = true}
+sphinx-rtd-theme = {version = ">=0.4.3,<0.6.0", optional = true}
 sphinx-autodoc-typehints = {version = "^1.7", optional = true}
 sphinx-click = {version = "^2.2", optional = true}
 marshmallow-jsonschema = {version = "^0.8.0", optional = true}
@@ -102,7 +102,7 @@ cuvner = "^18.0"
 pytest-cov = "^2.10"
 tox = "^3.15"
 lockfile = "^0.12.2"
-sphinx_rtd_theme = "^0.4.3"
+sphinx_rtd_theme = ">=0.4.3,<0.6.0"
 pytest-sugar = "^0.9.3"
 lxml = "^4.5"
 docshtest = "^0.0.2"