diff --git a/src/lib/logger.ts b/src/lib/logger.ts
index 1daa302..2f9e8bf 100644
--- a/src/lib/logger.ts
+++ b/src/lib/logger.ts
@@ -4,18 +4,29 @@ const isProduction = process.env.NODE_ENV === 'production';
 
 const logger = pino({
   level: isProduction ? 'info' : 'debug',
-  // Format timestamp en ISO 8601 lisible en prod
-  timestamp: () => `,"time":"${new Date().toISOString()}"`,
+  timestamp: pino.stdTimeFunctions.isoTime,
   ...(isProduction
     ? {
-        // En prod, utiliser pino-pretty aussi pour des logs lisibles
-        transport: {
-          target: 'pino-pretty',
-          options: {
-            colorize: true,
-            translateTime: 'SYS:dd/mm/yyyy HH:MM:ss',
-            ignore: 'pid,hostname',
-            singleLine: false,
+        // In production, use simple JSON output without worker threads
+        // This avoids worker.js module resolution issues in Docker/Next.js
+        formatters: {
+          level: (label) => {
+            return { level: label.toUpperCase() };
+          },
+          log: (object) => {
+            // Format readable timestamp in production
+            if (object.time && (typeof object.time === 'string' || typeof object.time === 'number')) {
+              const date = new Date(object.time);
+              object.time = date.toLocaleString('fr-FR', {
+                day: '2-digit',
+                month: '2-digit',
+                year: 'numeric',
+                hour: '2-digit',
+                minute: '2-digit',
+                second: '2-digit',
+              });
+            }
+            return object;
           },
         },
       }
@@ -29,12 +40,12 @@ const logger = pino({
             singleLine: true,
           },
         },
+        formatters: {
+          level: (label) => {
+            return { level: label.toUpperCase() };
+          },
+        },
       }),
-  formatters: {
-    level: (label) => {
-      return { level: label.toUpperCase() };
-    },
-  },
 });
 
 // Prevent memory leaks in development (Node.js runtime only)