diff --git a/docling/datamodel/settings.py b/docling/datamodel/settings.py
index 7daf5047b..b1c47305f 100644
--- a/docling/datamodel/settings.py
+++ b/docling/datamodel/settings.py
@@ -2,7 +2,7 @@
 from pathlib import Path
 
 from pydantic import BaseModel
-from pydantic_settings import BaseSettings
+from pydantic_settings import BaseSettings, SettingsConfigDict
 
 
 class DocumentLimits(BaseModel):
@@ -40,6 +40,8 @@ class DebugSettings(BaseModel):
 
 
 class AppSettings(BaseSettings):
+    model_config = SettingsConfigDict(env_prefix="DOCLING_", env_nested_delimiter="_")
+
     perf: BatchConcurrencySettings
     debug: DebugSettings