diff --git a/ivette/src/renderer/Controller.tsx b/ivette/src/renderer/Controller.tsx
index 5d4d89e65643e655ec67432eab8ee15327480520..5dde04e965faa98d5ec971575096eb8c58603725 100644
--- a/ivette/src/renderer/Controller.tsx
+++ b/ivette/src/renderer/Controller.tsx
@@ -40,8 +40,6 @@ import { Text } from 'dome/text/editors';
 import * as Ivette from 'ivette';
 import * as Server from 'frama-c/server';
 
-import 'codemirror/theme/ambiance.css';
-
 // --------------------------------------------------------------------------
 // --- Configure Server
 // --------------------------------------------------------------------------