diff --git a/README.org b/README.org
index 96896ac..2661b8c 100644
--- a/README.org
+++ b/README.org
@@ -3394,6 +3394,7 @@ handled by [[info:org#Noweb Reference Syntax][noweb (info)]].
 *** [[info:org#LaTeX header and sectioning][Deprecated LaTeX preamble editing methods]]                      :noexport:
 :PROPERTIES:
 :CUSTOM_ID: sec:easy-latex-preamble-editing
+:header-args:emacs-lisp: :tangle no
 :END:
 
 *NOTE:* This [[info:org#Top][Org (info)]] file uses the recommended method of noweb trickery in
@@ -3429,7 +3430,7 @@ in [[info:org#Export Settings][#+INCLUDE: <FILE>]] files.
 #+caption: LaTeX preamble =latex_header= and =latex_extra_header= export options
 #+caption: easily.
 #+name: lst:org-babel-latex-header-blocks
-#+begin_src emacs-lisp -n :exports code :results silent :tangle no
+#+begin_src emacs-lisp -n :exports code :results silent
 (with-eval-after-load 'emacs
   (defun prefix-all-lines (prefix body)
     (with-temp-buffer
@@ -3463,7 +3464,7 @@ prefixes all lines with \"#+latex_header: \"."
 #+caption[Convert marked LaTeX export blocks to LaTeX header lines]:
 #+caption: Convert marked LaTeX export blocks to LaTeX header lines.
 #+name: lst:org-latex-header-blocks-filter
-#+begin_src emacs-lisp -n :results silent :tangle no
+#+begin_src emacs-lisp -n :results silent
 (with-eval-after-load 'ox
   (defun org-latex-header-blocks-filter (backend)
     "Convert marked LaTeX export blocks to \"#+latex_header: \" lines.
@@ -5228,6 +5229,7 @@ print(q)
 *** [[https://github.com/astoff/code-cells.el#readme][Code-cells]]                                                     :noexport:
 :PROPERTIES:
 :CUSTOM_ID: sec:code-cells
+:header-args:emacs-lisp: :tangle no
 :END:
 
 [[https://github.com/astoff/code-cells.el#readme][Code-cells]] allows to edit [[https://ipython.org/notebook.html][IPython or Jupyter notebooks]] in Emacs with help from
@@ -5239,7 +5241,7 @@ configures =code-cells=.
 #+caption[Configure =code-cells=]:
 #+caption: Configure =code-cells=.
 #+name: lst:configure-code-cells
-#+begin_src emacs-lisp -n :results silent :tangle no
+#+begin_src emacs-lisp -n :results silent
 (when (ensure-package-installation 'code-cells)
   (with-eval-after-load 'code-cells
     (let ((map code-cells-mode-map))
@@ -5805,6 +5807,7 @@ src_emacs-lisp{(call-interactively 'consult-bookmark)} is {{{kbd(C-x r b)}}}.
 *** [[info:url#Top][URL (info)]]                                                     :noexport:
 :PROPERTIES:
 :CUSTOM_ID: sec:url
+:header-args:emacs-lisp: :tangle no
 :END:
 
 [[https://lists.gnu.org/archive/html/emacs-devel/2024-03/msg00670.html][How to retrieve only URL metadata]]
@@ -5813,7 +5816,7 @@ src_emacs-lisp{(call-interactively 'consult-bookmark)} is {{{kbd(C-x r b)}}}.
 #+caption: Make an URL HEAD request.
 #+name: lst:url-head-request
 #+header: :wrap "src text -n :eval no"
-#+begin_src emacs-lisp -n :eval never-export :exports both :tangle no
+#+begin_src emacs-lisp -n :eval never-export :exports both
 (with-current-buffer
     (let ((url-request-method "HEAD"))
       (url-retrieve-synchronously "https://www.gnu.org/"))