diff --git a/pyproject.toml b/pyproject.toml
index b28439a..e4434ea 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,7 +19,7 @@ include = ["src/ikea_api/py.typed"]
 python = "^3.8"
 typing-extensions = {version = "^4.0.0", python = "<3.10"}
 requests = {version = "*", optional = true}
-pydantic = {version = "^1.8.0", optional = true}
+pydantic = {version = ">=1.8,<3.0", optional = true}
 httpx = {version = "^0.23", optional = true}
 
 [tool.poetry.dev-dependencies]