diff --git a/scrapy/pipelines/images.py b/scrapy/pipelines/images.py
index a511887b6..f008a5420 100644
--- a/scrapy/pipelines/images.py
+++ b/scrapy/pipelines/images.py
@@ -42,7 +42,7 @@ class ImagesPipeline(FilesPipeline):
     # ImagesPipeline. They may be overridden by settings.
     MIN_WIDTH = 0
     MIN_HEIGHT = 0
-    EXPIRES = 0
+    EXPIRES = 90
     THUMBS = {}
     DEFAULT_IMAGES_URLS_FIELD = 'image_urls'
     DEFAULT_IMAGES_RESULT_FIELD = 'images'