diff --git a/pyproject.toml b/pyproject.toml
index d83e9e1..0bcb18c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,7 +20,7 @@ python = "^3.8"
 typing-extensions = {version = "^4.0.0", python = "<3.10"}
 requests = {version = "*", optional = true}
 pydantic = {version = ">=2.0,<3.0", optional = true}
-httpx = {version = "^0.23", optional = true}
+httpx = {version = ">=0.23,<0.28", optional = true}
 
 [tool.poetry.dev-dependencies]
 pytest = "*"