diff --git a/scripts/resize.sh b/scripts/resize.sh
index d9e1439..769b207 100644
--- a/scripts/resize.sh
+++ b/scripts/resize.sh
@@ -10,11 +10,13 @@ elif ! [ -d ./character_info ]; then
 fi
 
 # .png_large がなかったら、.png を .png_large にリネームしたあと 256x256 の .png を作成する
+# .png が 256x256 だった場合は何もしない
 for i in ./character_info/*/icons/*.png; do
   if [ -f "${i/%/_large}" ]; then continue; fi
+  if [ "$(magick identify -format "%w %h" "$i")" = "256 256" ]; then continue; fi
   echo "---"
   mv "$i" "${i/%/_large}"
-  convert -resize 256x256 "${i/%/_large}" "$i"
+  magick convert -resize 256x256 "${i/%/_large}" "$i"
   file "${i%/*}"/*
 done
 echo "--->done!"