diff --git a/integrations/openrouter/pyproject.toml b/integrations/openrouter/pyproject.toml
index dd9e191421..d151383118 100644
--- a/integrations/openrouter/pyproject.toml
+++ b/integrations/openrouter/pyproject.toml
@@ -7,7 +7,7 @@ name = "openrouter-haystack"
 dynamic = ["version"]
 description = ''
 readme = "README.md"
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 license = "Apache-2.0"
 keywords = []
 authors = [{ name = "deepset GmbH", email = "info@deepset.ai" }]
@@ -15,7 +15,6 @@ classifiers = [
   "License :: OSI Approved :: Apache Software License",
   "Development Status :: 4 - Beta",
   "Programming Language :: Python",
-  "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",
@@ -23,7 +22,7 @@ classifiers = [
   "Programming Language :: Python :: Implementation :: CPython",
   "Programming Language :: Python :: Implementation :: PyPy",
 ]
-dependencies = ["haystack-ai>=2.19.0"]
+dependencies = ["haystack-ai>=2.22.0"]
 
 [project.urls]
 Documentation = "https://github.com/deepset-ai/haystack-core-integrations/tree/main/integrations/openrouter#readme"
@@ -76,7 +75,6 @@ disallow_incomplete_defs = true
 
 
 [tool.ruff]
-target-version = "py39"
 line-length = 120
 
 [tool.ruff.lint]
@@ -123,10 +121,6 @@ ignore = [
   "B008",
   "S101",
 ]
-unfixable = [
-  # Don't touch unused imports
-  "F401",
-]
 
 [tool.ruff.lint.isort]
 known-first-party = ["haystack_integrations"]
diff --git a/integrations/openrouter/src/haystack_integrations/components/generators/openrouter/chat/chat_generator.py b/integrations/openrouter/src/haystack_integrations/components/generators/openrouter/chat/chat_generator.py
index b68978d376..de16dfac5c 100644
--- a/integrations/openrouter/src/haystack_integrations/components/generators/openrouter/chat/chat_generator.py
+++ b/integrations/openrouter/src/haystack_integrations/components/generators/openrouter/chat/chat_generator.py
@@ -2,7 +2,7 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
-from typing import Any, Optional
+from typing import Any
 
 from haystack import component, default_to_dict, logging
 from haystack.components.generators.chat import OpenAIChatGenerator
@@ -61,14 +61,14 @@ def __init__(
         *,
         api_key: Secret = Secret.from_env_var("OPENROUTER_API_KEY"),
         model: str = "openai/gpt-5-mini",
-        streaming_callback: Optional[StreamingCallbackT] = None,
-        api_base_url: Optional[str] = "https://openrouter.ai/api/v1",
-        generation_kwargs: Optional[dict[str, Any]] = None,
-        tools: Optional[ToolsType] = None,
-        timeout: Optional[float] = None,
-        extra_headers: Optional[dict[str, Any]] = None,
-        max_retries: Optional[int] = None,
-        http_client_kwargs: Optional[dict[str, Any]] = None,
+        streaming_callback: StreamingCallbackT | None = None,
+        api_base_url: str | None = "https://openrouter.ai/api/v1",
+        generation_kwargs: dict[str, Any] | None = None,
+        tools: ToolsType | None = None,
+        timeout: float | None = None,
+        extra_headers: dict[str, Any] | None = None,
+        max_retries: int | None = None,
+        http_client_kwargs: dict[str, Any] | None = None,
     ):
         """
         Creates an instance of OpenRouterChatGenerator. Unless specified otherwise,
@@ -167,10 +167,10 @@ def _prepare_api_call(
         self,
         *,
         messages: list[ChatMessage],
-        streaming_callback: Optional[StreamingCallbackT] = None,
-        generation_kwargs: Optional[dict[str, Any]] = None,
-        tools: Optional[ToolsType] = None,
-        tools_strict: Optional[bool] = None,
+        streaming_callback: StreamingCallbackT | None = None,
+        generation_kwargs: dict[str, Any] | None = None,
+        tools: ToolsType | None = None,
+        tools_strict: bool | None = None,
     ) -> dict[str, Any]:
         # update generation kwargs by merging with the generation kwargs passed to the run method
         generation_kwargs = {**self.generation_kwargs, **(generation_kwargs or {})}