diff --git a/src/_assets/image/showcase/cards/groupon-top-400.jpg b/src/_assets/image/showcase/cards/groupon-top-400.jpg
deleted file mode 100644
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diff --git a/src/_assets/image/showcase/cards/groupon-top-400.png b/src/_assets/image/showcase/cards/groupon-top-400.png
new file mode 100644
index 00000000000..41657bcf3c2
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diff --git a/src/_assets/image/showcase/cards/groupon-top-600.jpg b/src/_assets/image/showcase/cards/groupon-top-600.jpg
deleted file mode 100644
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diff --git a/src/_assets/image/showcase/cards/groupon-top-600.png b/src/_assets/image/showcase/cards/groupon-top-600.png
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diff --git a/src/_data/showcases.yml b/src/_data/showcases.yml
index 732b4111b3a..ddaec256337 100644
--- a/src/_data/showcases.yml
+++ b/src/_data/showcases.yml
@@ -216,12 +216,12 @@
 
 - name: Groupon
   description: >
-    Groupon uses Flutter to help hundreds of thousands of merchants track campaign performance, 
+    Groupon uses Flutter to help hundreds of thousands of merchants track campaign performance,
     manage customer satisfaction, and get efficient support.
   logo_src: showcase/cards/groupon-logo.png
   play_store_link: https://play.google.com/store/apps/details?id=com.groupon.redemption
   logo_has_name: true
-  card_image: showcase/cards/groupon-top@.jpg
+  card_image: showcase/cards/groupon-top@.png
 
 - name: JD
   description: >