diff --git a/src/infrastructure/platform/adapters/discord_adapter.py b/src/infrastructure/platform/adapters/discord_adapter.py
index febba2e..6c7e482 100644
--- a/src/infrastructure/platform/adapters/discord_adapter.py
+++ b/src/infrastructure/platform/adapters/discord_adapter.py
@@ -400,6 +400,7 @@ class DiscordAdapter(PlatformAdapter):
             if image_path.startswith("base64://"):
                 # Base64 图片：解码 -> 内存 Object -> Discord
                 from io import BytesIO
+                import base64  # Fix: Ensure base64 is imported
                 try:
                     base64_data = image_path.split("base64://")[1]
                     image_bytes = base64.b64decode(base64_data)