diff --git a/tasks/build.rake b/tasks/build.rake
old mode 100644
new mode 100755
index 5040252..864b1f9
--- a/tasks/build.rake
+++ b/tasks/build.rake
@@ -24,12 +24,14 @@ task :build do
     if os == :linux
       sh 'grep -l -r ecx.images-amazon.com | sort | uniq | xargs --no-run-if-empty sed -ie "s/http:\/\/ecx.images-amazon.com/https:\/\/images-na.ssl-images-amazon.com/g"'
       sh 'grep -l -r "http://www.amazon.co.jp/exec" | sort | uniq | xargs --no-run-if-empty sed -i -e "s/http:\/\/www.amazon.co.jp\/exec/https:\/\/www.amazon.co.jp\/exec/g"'
+      sh 'find . -type f -name "*.mde" | xargs --no-run-if-empty rm || true'
+      sh 'find . -type f -name "*.md-e" | xargs --no-run-if-empty rm || true'
     else
-      sh 'grep -l -r ecx.images-amazon.com | sort | uniq | xargs d -ie "s/http:\/\/ecx.images-amazon.com/https:\/\/images-na.ssl-images-amazon.com/g"'
-      sh 'grep -l -r "http://www.amazon.co.jp/exec" | sort | uniq | xargs sed -i -e "s/http:\/\/www.amazon.co.jp\/exec/https:\/\/www.amazon.co.jp\/exec/g"'
+      sh 'grep -l -r ecx.images-amazon.com . | sort | uniq | xargs d -ie "s/http:\/\/ecx.images-amazon.com/https:\/\/images-na.ssl-images-amazon.com/g"'
+      sh 'grep -l -r "http://www.amazon.co.jp/exec" . | sort | uniq | xargs sed -i -e "s/http:\/\/www.amazon.co.jp\/exec/https:\/\/www.amazon.co.jp\/exec/g"'
+      sh 'find . -type f -name "*.mde" | xargs rm || true'
+      sh 'find . -type f -name "*.md-e" | xargs rm || true'
     end
-    sh 'find . -type f -name "*.mde" | xargs --no-run-if-empty rm || true'
-    sh 'find . -type f -name "*.md-e" | xargs --no-run-if-empty rm || true'
   end
 
   cd 'public' do