diff --git a/pyproject.toml b/pyproject.toml
index 974ff9d..81e9004 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -64,7 +64,7 @@ dev = [
 ]
 docs = [
     "sphinx>=5.0.0,<6.0.0",
-    "sphinx-rtd-theme>=1.0.0,<2.0.0",
+    "sphinx-rtd-theme>=1.0.0,<4.0.0",
     "sphinx-autodoc-typehints>=1.12.0,<2.0.0",
 ]
 litellm = [
@@ -114,7 +114,7 @@ all = [
 
     # docs
     "sphinx>=5.0.0,<6.0.0",
-    "sphinx-rtd-theme>=1.0.0,<2.0.0",
+    "sphinx-rtd-theme>=1.0.0,<4.0.0",
     "sphinx-autodoc-typehints>=1.12.0,<2.0.0",
 
     # litellm