diff --git a/contrib/lisp/ox-deck.el b/contrib/lisp/ox-deck.el
index 207d57606..a1d67b759 100644
--- a/contrib/lisp/ox-deck.el
+++ b/contrib/lisp/ox-deck.el
@@ -425,10 +425,10 @@ holding export options."
       (mapconcat
        (lambda (script)
          (format
-          "<script src='%s' type='text/javascript'></script>" script))
+          "<script src='%s'></script>" script))
        (plist-get pkg-info :scripts) "\n")
       (org-html--build-mathjax-config info)
-      "<script type='text/javascript'>"
+      "<script>"
       "  $(document).ready(function () { $.deck('.slide'); });"
       "</script>"
       (org-html--build-head info)
diff --git a/contrib/lisp/ox-s5.el b/contrib/lisp/ox-s5.el
index 748101703..d729e38bf 100644
--- a/contrib/lisp/ox-s5.el
+++ b/contrib/lisp/ox-s5.el
@@ -255,7 +255,7 @@ INFO is a plist used as a communication channel."
       "<!-- S5 JS -->"
       (concat
        "<script src='" dir
-       "/default/slides.js' type='text/javascript'></script>")) "\n")))
+       "/default/slides.js'></script>")) "\n")))
 
 (defun org-s5--build-meta-info (info)
   (concat