diff --git a/config.sample.yaml b/config.sample.yaml
index d0d9543ce4f8e958cc9a8a9fd6379a5e489afb48..837979596d0082758880c5f12bbdd6d71dc48c8d 100644
--- a/config.sample.yaml
+++ b/config.sample.yaml
@@ -410,6 +410,7 @@ thumbnails:
     - "image/apng"
     - "image/gif"
     - "image/heif"
+    - "image/heic"
     - "image/webp"
     - "image/bmp"
     - "image/tiff"