diff --git a/front/.eslintrc.js b/front/.eslintrc.js
index d433a16e5..c78088372 100644
--- a/front/.eslintrc.js
+++ b/front/.eslintrc.js
@@ -46,6 +46,7 @@ module.exports = {
     'simple-import-sort/imports': 'error',
     'simple-import-sort/exports': 'error',
     'twenty/sort-css-properties-alphabetically': 'error',
-    'twenty/no-hardcoded-colors': 'error'
+    'twenty/no-hardcoded-colors': 'error',
+    'func-style':['error', 'declaration', { 'allowArrowFunctions': true }],
   }
 };
diff --git a/front/src/modules/hotkeys/hooks/useDirectHotkeys.ts b/front/src/modules/hotkeys/hooks/useDirectHotkeys.ts
index c1223f266..c2b76e8db 100644
--- a/front/src/modules/hotkeys/hooks/useDirectHotkeys.ts
+++ b/front/src/modules/hotkeys/hooks/useDirectHotkeys.ts
@@ -15,7 +15,7 @@ export function useDirectHotkeys(
 ) {
   const [pendingHotkey, setPendingHotkey] = useRecoilState(pendingHotkeyState);
 
-  const callbackIfDirectKey = function (
+  function callbackIfDirectKey(
     keyboardEvent: KeyboardEvent,
     hotkeysEvent: Hotkey,
   ) {
@@ -24,7 +24,7 @@ export function useDirectHotkeys(
       return;
     }
     setPendingHotkey(null);
-  };
+  }
 
   useHotkeys(keys, callbackIfDirectKey, dependencies);
 }
diff --git a/server/.eslintrc.js b/server/.eslintrc.js
index 1672a34e0..495f70b1e 100644
--- a/server/.eslintrc.js
+++ b/server/.eslintrc.js
@@ -21,5 +21,6 @@ module.exports = {
     '@typescript-eslint/explicit-function-return-type': 'off',
     '@typescript-eslint/explicit-module-boundary-types': 'off',
     '@typescript-eslint/no-explicit-any': 'off',
+    'func-style':['error', 'declaration', { 'allowArrowFunctions': true }],
   },
 };