diff --git a/slides/02-Developers/09-aria.html.md b/slides/02-Developers/01-aria.html.md
old mode 100755
new mode 100644
similarity index 100%
rename from slides/02-Developers/09-aria.html.md
rename to slides/02-Developers/01-aria.html.md
diff --git a/slides/02-Developers/01-headings.html.md b/slides/02-Developers/02-headings.html.md
old mode 100755
new mode 100644
similarity index 100%
rename from slides/02-Developers/01-headings.html.md
rename to slides/02-Developers/02-headings.html.md
diff --git a/slides/02-Developers/02-images.html.md b/slides/02-Developers/03-images.html.md
old mode 100755
new mode 100644
similarity index 100%
rename from slides/02-Developers/02-images.html.md
rename to slides/02-Developers/03-images.html.md
diff --git a/slides/02-Developers/03-keyboard.html.md b/slides/02-Developers/04-keyboard.html.md
old mode 100755
new mode 100644
similarity index 100%
rename from slides/02-Developers/03-keyboard.html.md
rename to slides/02-Developers/04-keyboard.html.md
diff --git a/slides/02-Developers/04-labels.html.md b/slides/02-Developers/05-labels.html.md
old mode 100755
new mode 100644
similarity index 100%
rename from slides/02-Developers/04-labels.html.md
rename to slides/02-Developers/05-labels.html.md
diff --git a/slides/02-Developers/05-list.html.md b/slides/02-Developers/06-list.html.md
old mode 100755
new mode 100644
similarity index 100%
rename from slides/02-Developers/05-list.html.md
rename to slides/02-Developers/06-list.html.md
diff --git a/slides/02-Developers/06-dialog.html.md b/slides/02-Developers/07-dialog.html.md
old mode 100755
new mode 100644
similarity index 100%
rename from slides/02-Developers/06-dialog.html.md
rename to slides/02-Developers/07-dialog.html.md
diff --git a/slides/02-Developers/07-tables.html.md b/slides/02-Developers/08-tables.html.md
old mode 100755
new mode 100644
similarity index 100%
rename from slides/02-Developers/07-tables.html.md
rename to slides/02-Developers/08-tables.html.md
diff --git a/slides/02-Developers/08-menu.html.md b/slides/02-Developers/09-menu.html.md
old mode 100755
new mode 100644
similarity index 100%
rename from slides/02-Developers/08-menu.html.md
rename to slides/02-Developers/09-menu.html.md