diff --git a/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Contents.json b/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Contents.json
index 79cbef912..908ec8288 100644
--- a/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Contents.json
+++ b/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Contents.json
@@ -1,61 +1,61 @@
 {
   "images" : [
     {
-      "filename" : "Icon-MacOS-16x16@1x.png.png",
+      "filename" : "Icon-MacOS-16x16@1x.png",
       "idiom" : "mac",
       "scale" : "1x",
       "size" : "16x16"
     },
     {
-      "filename" : "Icon-MacOS-16x16@2x.png.png",
+      "filename" : "Icon-MacOS-16x16@2x.png",
       "idiom" : "mac",
       "scale" : "2x",
       "size" : "16x16"
     },
     {
-      "filename" : "Icon-MacOS-32x32@1x.png.png",
+      "filename" : "Icon-MacOS-32x32@1x.png",
       "idiom" : "mac",
       "scale" : "1x",
       "size" : "32x32"
     },
     {
-      "filename" : "Icon-MacOS-32x32@2x.png.png",
+      "filename" : "Icon-MacOS-32x32@2x.png",
       "idiom" : "mac",
       "scale" : "2x",
       "size" : "32x32"
     },
     {
-      "filename" : "Icon-MacOS-128x128@1x.png.png",
+      "filename" : "Icon-MacOS-128x128@1x.png",
       "idiom" : "mac",
       "scale" : "1x",
       "size" : "128x128"
     },
     {
-      "filename" : "Icon-MacOS-128x128@2x.png.png",
+      "filename" : "Icon-MacOS-128x128@2x.png",
       "idiom" : "mac",
       "scale" : "2x",
       "size" : "128x128"
     },
     {
-      "filename" : "Icon-MacOS-256x256@1x.png.png",
+      "filename" : "Icon-MacOS-256x256@1x.png",
       "idiom" : "mac",
       "scale" : "1x",
       "size" : "256x256"
     },
     {
-      "filename" : "Icon-MacOS-256x256@2x.png.png",
+      "filename" : "Icon-MacOS-256x256@2x.png",
       "idiom" : "mac",
       "scale" : "2x",
       "size" : "256x256"
     },
     {
-      "filename" : "Icon-MacOS-512x512@1x.png.png",
+      "filename" : "Icon-MacOS-512x512@1x.png",
       "idiom" : "mac",
       "scale" : "1x",
       "size" : "512x512"
     },
     {
-      "filename" : "Icon-MacOS-512x512@2x.png.png",
+      "filename" : "Icon-MacOS-512x512@2x.png",
       "idiom" : "mac",
       "scale" : "2x",
       "size" : "512x512"
diff --git a/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-128x128@1x.png b/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-128x128@1x.png
new file mode 100644
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diff --git a/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-16x16@1x.png b/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-16x16@1x.png
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diff --git a/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-256x256@1x.png b/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-256x256@1x.png
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diff --git a/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-256x256@1x.png.png b/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-256x256@1x.png.png
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diff --git a/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-256x256@2x.png b/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-256x256@2x.png
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index 943c3a89e..000000000
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diff --git a/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-32x32@1x.png b/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-32x32@1x.png
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index 000000000..3962f530f
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diff --git a/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-32x32@1x.png.png b/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-32x32@1x.png.png
deleted file mode 100644
index 084985da6..000000000
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diff --git a/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-32x32@2x.png b/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-32x32@2x.png
new file mode 100644
index 000000000..c2a490657
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diff --git a/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-32x32@2x.png.png b/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-32x32@2x.png.png
deleted file mode 100644
index 0c1d6e3b4..000000000
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diff --git a/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-512x512@1x.png b/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-512x512@1x.png
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index 000000000..0382caa07
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diff --git a/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-512x512@1x.png.png b/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-512x512@1x.png.png
deleted file mode 100644
index 943c3a89e..000000000
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diff --git a/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-512x512@2x.png b/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-512x512@2x.png
new file mode 100644
index 000000000..95a4b1625
Binary files /dev/null and b/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-512x512@2x.png differ
diff --git a/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-512x512@2x.png.png b/Mac/Resources/Assets.xcassets/AppIcon.appiconset/Icon-MacOS-512x512@2x.png.png
deleted file mode 100644
index 61f85ee9d..000000000
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diff --git a/NetNewsWire.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved b/NetNewsWire.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
index f91777638..1c51d1a28 100644
--- a/NetNewsWire.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
+++ b/NetNewsWire.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
@@ -33,8 +33,8 @@
         "repositoryURL": "https://github.com/tid-kijyun/Kanna.git",
         "state": {
           "branch": null,
-          "revision": "4a80ebe93b6966d5083394fcaaaff57a2fcec935",
-          "version": "5.2.3"
+          "revision": "c657fb9f5827ef138068215c76ad0bb62bbc92da",
+          "version": "5.2.4"
         }
       },
       {
@@ -78,8 +78,8 @@
         "repositoryURL": "https://github.com/Ranchero-Software/RSParser.git",
         "state": {
           "branch": null,
-          "revision": "a4467cb6ab32d67fa8b09fcef8b234c7f96b7f9c",
-          "version": "2.0.0-beta3"
+          "revision": "fd9b9c974d551a9c94d970da90a42571d234efd6",
+          "version": "2.0.0-beta4"
         }
       },
       {