diff --git a/pdf/build_book b/pdf/build_book
old mode 100755
new mode 100644
diff --git a/pdf/build_book_html.sh b/pdf/build_book_html.sh
old mode 100755
new mode 100644
diff --git a/pdf/clean_book b/pdf/clean_book
old mode 100755
new mode 100644
diff --git a/pdf/clean_book.bat b/pdf/clean_book.bat
old mode 100755
new mode 100644
diff --git a/pdf/html_book b/pdf/html_book
old mode 100755
new mode 100644
diff --git a/pdf/html_build_book b/pdf/html_build_book
old mode 100755
new mode 100644
diff --git a/pdf/short_build_book b/pdf/short_build_book
old mode 100755
new mode 100644
diff --git a/pdf/update_pdf.sh b/pdf/update_pdf.sh
old mode 100755
new mode 100644