diff --git a/src/common/env.py b/src/common/env.py
index 2bff30676..03a6d845e 100644
--- a/src/common/env.py
+++ b/src/common/env.py
@@ -15,4 +15,3 @@ def is_truthy(value: Optional[str]) -> bool:
     if value is None:
         return False
     return value.strip().lower() in {"1", "true", "yes"}
-
diff --git a/src/constants.py b/src/constants.py
index c951ebda9..8e94148a1 100644
--- a/src/constants.py
+++ b/src/constants.py
@@ -1,5 +1,4 @@
-"""
-Centralized constants for the SAMO project.
+"""Centralized constants for the SAMO project.
 
 This module contains all shared constants to avoid duplication across modules.
 """
@@ -7,5 +6,5 @@
 import os
 
 # Emotion model configuration
-DEFAULT_EMOTION_MODEL_DIR = '/app/models/emotion-english-distilroberta-base'
-EMOTION_MODEL_DIR = os.getenv('EMOTION_MODEL_DIR', DEFAULT_EMOTION_MODEL_DIR)
+DEFAULT_EMOTION_MODEL_DIR = "/app/models/emotion-english-distilroberta-base"
+EMOTION_MODEL_DIR = os.getenv("EMOTION_MODEL_DIR", DEFAULT_EMOTION_MODEL_DIR)