diff --git a/README.md b/README.md
index fb37e90..051c06f 100644
--- a/README.md
+++ b/README.md
@@ -32,15 +32,18 @@ Alice <-- Bob: Another authentication Response
 4. Preview diagrams with `C-c C-c` (`plantuml-preview`).
 
 **WARNING:** This may send information to
-`"https://www.plantuml.com/plantuml"`!
-
-Before previewing any sensitive material, check that
-`plantuml-jar-path` is correct for your use case and that
-`plantuml-default-exec-mode` is set to `jar`.
+`"https://www.plantuml.com/plantuml"`! Check that
+`plantuml-default-exec-mode` is configured correctly for your use case
+before previewing any sensitive material.
 
 ```lisp
-	(setq plantuml-jar-path "/path/to/your/copy/of/plantuml.jar")
-	(setq plantuml-default-exec-mode 'jar)
+    ;; Sample jar configuration
+    (setq plantuml-jar-path "/path/to/your/copy/of/plantuml.jar")
+    (setq plantuml-default-exec-mode 'jar)
+
+    ;; Sample executable configuration
+    (setq plantuml-executable-path "/path/to/your/copy/of/plantuml.bin")
+    (setq plantuml-default-exec-mode 'executable)
 ```
 
 See [Execution modes](#execution-modes) for more information.
@@ -49,17 +52,17 @@ See [Execution modes](#execution-modes) for more information.
 
 Make sure you have [MELPA](http://melpa.org/) enabled in your ``emacs.d``. Then, you can just
 
-	M-x package-install<RET>
-	plantuml-mode<RET>
+    M-x package-install<RET>
+    plantuml-mode<RET>
 
 Also, to enable preview you need to tell `plantuml-mode` where to locate the PlantUML JAR file. By default it will look for it in `~/plantuml.jar`, but you can specify any location with:
 
-	M-x customize-variable<RET>
-	plantuml-jar-path<RET>
+    M-x customize-variable<RET>
+    plantuml-jar-path<RET>
 
 You can also download the latest version of PlantUML straight into `plantuml-jar-path`:
 
-	M-x plantuml-download-jar<RET>
+    M-x plantuml-download-jar<RET>
 
 # Features
 
@@ -72,8 +75,8 @@ You can also download the latest version of PlantUML straight into `plantuml-jar
 
 You can automatically enable `plantuml-mode` for files with extension `.plantuml` by adding the following to your `.emacsrc`:
 
-	;; Enable plantuml-mode for PlantUML files
-	(add-to-list 'auto-mode-alist '("\\.plantuml\\'" . plantuml-mode))
+    ;; Enable plantuml-mode for PlantUML files
+    (add-to-list 'auto-mode-alist '("\\.plantuml\\'" . plantuml-mode))
 
 Of course, you can always enable manually the major mode by typing `M-x plantuml-mode` once in the desired PlantUML file buffer.
 
@@ -95,11 +98,11 @@ If you want to force a specific output format, you can customize the variable `p
 
 The following shortcuts are enabled by default:
 
-	C-c C-c  plantuml-preview: renders a PlantUML diagram from the current buffer in the best supported format
+    C-c C-c  plantuml-preview: renders a PlantUML diagram from the current buffer in the best supported format
 
-	C-u C-c C-c  plantuml-preview in other window
+    C-u C-c C-c  plantuml-preview in other window
 
-	C-u C-u C-c C-c plantuml-preview in other frame
+    C-u C-u C-c C-c plantuml-preview in other frame
 
 ## Integration with `org-mode`