diff --git a/collection.yaml b/collection.yaml
index 178c32f..37e0c1b 100644
--- a/collection.yaml
+++ b/collection.yaml
@@ -151,7 +151,7 @@ collection:
     - {name: Constantin Pape}
     cite:
     - {doi: 'https://doi.org/10.1007/978-3-030-59722-1_7', text: Donglai Wei et al.}
-    covers: ['https://raw.githubusercontent.com/ilastik/bioimage-io-resources/main/dataset_src/mitoem-cover0.jpg',
+    covers: ['https://raw.githubusercontent.com/ilastik/bioimage-io-resources/main/dataset_src/mitoem-cover0.png',
       'https://raw.githubusercontent.com/ilastik/bioimage-io-resources/main/dataset_src/mitoem-cover1.png']
     description: Training data for mitochondria segmentation in 3d EM.
     documentation: https://raw.githubusercontent.com/ilastik/bioimage-io-resources/main/dataset_src/mitoem.md
diff --git a/dataset_src/mitoem-cover0.png b/dataset_src/mitoem-cover0.png
new file mode 100644
index 0000000..5a5951f
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diff --git a/dataset_src/mitoem-cover1.png b/dataset_src/mitoem-cover1.png
new file mode 100644
index 0000000..125176e
Binary files /dev/null and b/dataset_src/mitoem-cover1.png differ