diff --git a/wallpapers/Next/contents/images/1024x768.jpg b/wallpapers/Next/contents/images/1024x768.png
similarity index 100%
rename from wallpapers/Next/contents/images/1024x768.jpg
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diff --git a/wallpapers/Next/contents/images/1280x1024.jpg b/wallpapers/Next/contents/images/1280x1024.png
similarity index 100%
rename from wallpapers/Next/contents/images/1280x1024.jpg
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diff --git a/wallpapers/Next/contents/images/1280x800.jpg b/wallpapers/Next/contents/images/1280x800.png
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diff --git a/wallpapers/Next/contents/images/1366x768.jpg b/wallpapers/Next/contents/images/1366x768.png
similarity index 100%
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diff --git a/wallpapers/Next/contents/images/1440x900.jpg b/wallpapers/Next/contents/images/1440x900.png
similarity index 100%
rename from wallpapers/Next/contents/images/1440x900.jpg
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diff --git a/wallpapers/Next/contents/images/1600x1200.jpg b/wallpapers/Next/contents/images/1600x1200.png
similarity index 100%
rename from wallpapers/Next/contents/images/1600x1200.jpg
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diff --git a/wallpapers/Next/contents/images/1680x1050.jpg b/wallpapers/Next/contents/images/1680x1050.png
similarity index 100%
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diff --git a/wallpapers/Next/contents/images/1920x1080.jpg b/wallpapers/Next/contents/images/1920x1080.png
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rename from wallpapers/Next/contents/images/1920x1080.jpg
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diff --git a/wallpapers/Next/contents/images/1920x1200.jpg b/wallpapers/Next/contents/images/1920x1200.png
similarity index 100%
rename from wallpapers/Next/contents/images/1920x1200.jpg
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diff --git a/wallpapers/Next/contents/images/2560x1440.jpg b/wallpapers/Next/contents/images/2560x1440.png
similarity index 100%
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diff --git a/wallpapers/Next/contents/images/2560x1600.jpg b/wallpapers/Next/contents/images/2560x1600.png
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diff --git a/wallpapers/Next/contents/images/3200x1800.jpg b/wallpapers/Next/contents/images/3200x1800.png
similarity index 100%
rename from wallpapers/Next/contents/images/3200x1800.jpg
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diff --git a/wallpapers/Next/contents/images/3200x2000.jpg b/wallpapers/Next/contents/images/3200x2000.png
similarity index 100%
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diff --git a/wallpapers/Next/contents/images/3840x2160.jpg b/wallpapers/Next/contents/images/3840x2160.png
similarity index 100%
rename from wallpapers/Next/contents/images/3840x2160.jpg
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diff --git a/wallpapers/Next/contents/images/5120x2880.jpg b/wallpapers/Next/contents/images/5120x2880.png
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diff --git a/wallpapers/Next/contents/images/README b/wallpapers/Next/contents/images/README
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+These images are actually JPEGs, not PNGs. This is done because changing the filetype of the wallpaper is problematic due to the issue described in https://phabricator.kde.org/T12611. I'm sorry. :/