diff --git a/NineChess/resources/convert.bat b/NineChess/resources/convert.bat
new file mode 100644
index 00000000..2753e9dc
--- /dev/null
+++ b/NineChess/resources/convert.bat
@@ -0,0 +1,12 @@
+@echo on
+
+@echo ImageMagick fix libpng warning: iCCP: Not recognizing known sRGB profile ...
+@echo Search PNG in subdirs and convert ...
+
+set fn=ImageMagick\convert.exe
+
+for /f "tokens=*" %%i in ('dir/s/b *.png') do "%fn%" "%%i" -strip "%%i"
+
+@echo Done.
+
+pause
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diff --git a/NineChess/resources/icon/First.png b/NineChess/resources/icon/First.png
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diff --git a/NineChess/resources/icon/Help.png b/NineChess/resources/icon/Help.png
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diff --git a/NineChess/resources/icon/Invert.png b/NineChess/resources/icon/Invert.png
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diff --git a/NineChess/resources/icon/OpenHS.png b/NineChess/resources/icon/OpenHS.png
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diff --git a/NineChess/resources/icon/Pause.png b/NineChess/resources/icon/Pause.png
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diff --git a/NineChess/resources/icon/Play.png b/NineChess/resources/icon/Play.png
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diff --git a/NineChess/resources/icon/PrimaryKeyHS.png b/NineChess/resources/icon/PrimaryKeyHS.png
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diff --git a/NineChess/resources/icon/Request.png b/NineChess/resources/icon/Request.png
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diff --git a/NineChess/resources/icon/Web.png b/NineChess/resources/icon/Web.png
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