diff --git a/bucket/waifu2x-ncnn-vulkan.json b/bucket/waifu2x-ncnn-vulkan.json
index 0af6145d86..5868804f7b 100644
--- a/bucket/waifu2x-ncnn-vulkan.json
+++ b/bucket/waifu2x-ncnn-vulkan.json
@@ -1,23 +1,23 @@
-{
-    "version": "20210521",
-    "description": "waifu2x converter ncnn version.",
-    "homepage": "https://github.com/nihui/waifu2x-ncnn-vulkan",
-    "license": "MIT",
-    "architecture": {
-        "64bit": {
-            "url": "https://github.com/nihui/waifu2x-ncnn-vulkan/releases/download/20210521/waifu2x-ncnn-vulkan-20210521-windows.zip",
-            "hash": "9569800CBE9575F5C1C5E13C491FC645FF0D447EAD5A853B5F2EFB2005B7417B",
-            "extract_dir": "waifu2x-ncnn-vulkan-20210521-windows"
-        }
-    },
-    "bin": "waifu2x-ncnn-vulkan.exe",
-    "checkver": "github",
-    "autoupdate": {
-        "architecture": {
-            "64bit": {
-                "url": "https://github.com/nihui/waifu2x-ncnn-vulkan/releases/download/$version/waifu2x-ncnn-vulkan-$version-windows.zip",
-                "extract_dir": "waifu2x-ncnn-vulkan-$version-windows"
-            }
-        }
-    }
-}
+{
+    "version": "20210521",
+    "description": "waifu2x converter ncnn version.",
+    "homepage": "https://github.com/nihui/waifu2x-ncnn-vulkan",
+    "license": "MIT",
+    "architecture": {
+        "64bit": {
+            "url": "https://github.com/nihui/waifu2x-ncnn-vulkan/releases/download/20210521/waifu2x-ncnn-vulkan-20210521-windows.zip",
+            "hash": "9569800CBE9575F5C1C5E13C491FC645FF0D447EAD5A853B5F2EFB2005B7417B",
+            "extract_dir": "waifu2x-ncnn-vulkan-20210521-windows"
+        }
+    },
+    "bin": "waifu2x-ncnn-vulkan.exe",
+    "checkver": "github",
+    "autoupdate": {
+        "architecture": {
+            "64bit": {
+                "url": "https://github.com/nihui/waifu2x-ncnn-vulkan/releases/download/$version/waifu2x-ncnn-vulkan-$version-windows.zip",
+                "extract_dir": "waifu2x-ncnn-vulkan-$version-windows"
+            }
+        }
+    }
+}