diff --git a/pyaerocom/io/pyaro/pyaro_config.py b/pyaerocom/io/pyaro/pyaro_config.py
index 4891cff8e..a05d4f747 100644
--- a/pyaerocom/io/pyaro/pyaro_config.py
+++ b/pyaerocom/io/pyaro/pyaro_config.py
@@ -3,7 +3,7 @@
 import logging
 from importlib import resources
 from pathlib import Path
-from typing import ClassVar
+from typing import ClassVar, Any
 
 import yaml
 from pydantic import BaseModel, ConfigDict
@@ -15,6 +15,8 @@
 
 # TODO Check a validator if extra/kwarg is serializable. Either in json_repr or as a @field_validator on extra
 
+FilterArgs = dict[str, Any]
+
 
 class PyaroConfig(BaseModel):
     model_config = ConfigDict(arbitrary_types_allowed=True, extra="allow")
@@ -30,7 +32,7 @@ class PyaroConfig(BaseModel):
     name: str
     data_id: str
     filename_or_obj_or_url: str | list[str] | Path | list[Path]
-    filters: dict[str, dict[str, list[str]] | dict[str, list[tuple]]]
+    filters: dict[str, FilterArgs]
     name_map: dict[str, str] | None = None  # no Unit conversion option
 
     ##########################