diff --git a/README.md b/README.md
index 49f1ecb..4e20e6f 100644
--- a/README.md
+++ b/README.md
@@ -421,6 +421,32 @@ begins with `prefix` and ends with `suffix`.
 
 ### Case
 
+#### Functions to change case: camel-case, snake-case,... (new in 0.15)
+
+We use
+[cl-change-case](https://github.com/rudolfochrist/cl-change-case/) (go
+thank him and star the repo!).
+
+The available functions are:
+
+```
+:no-case (s &key replacement)
+:camel-case (s &key merge-numbers)
+:dot-case
+:header-case
+:param-case
+:pascal-case
+:path-case
+:sentence-case
+:snake-case
+:swap-case
+:title-case
+:constant-case
+```
+
+More documentation and examples are there.
+
+
 #### downcase, upcase, capitalize `(s)` fixing a built-in suprise. (new in 0.11)
 
 The functions `str:downcase`, `str:upcase` and `str:capitalize` return
@@ -484,6 +510,14 @@ Uses
 [cl-ppcre:regex-replace-all](http://weitz.de/cl-ppcre/#regex-replace-all)
 but quotes the user input to not treat it as a regex.
 
+#### remove-punctuation (s &key replacement)
+
+An alias to `str:no-case` (itself [`cl-change-case:no-case`](https://github.com/rudolfochrist/cl-change-case/#no-case)).
+
+~~~lisp
+(str:remove-punctuation "I say: - 'hello, world?'") ;; => "i say hello world"
+~~~
+
 
 #### prefix `(list-of-strings)` (renamed in 0.9)
 
@@ -563,6 +597,8 @@ Now:
 ("a" "b" "c" "")
 ~~~
 
+* 0.15, october 2019: added functions to change case (based on cl-change-case).
+  added remove-punctuation.
 * august, 2019: deprecated `prune`, renamed to `shorten`.
 * added `:limit` to `split`.
 * 0.13 june, 2019
diff --git a/str.asd b/str.asd
index 0fba219..1508b6f 100644
--- a/str.asd
+++ b/str.asd
@@ -4,13 +4,14 @@
   :author "vindarel <vindarel@mailz.org>"
   :maintainer "vindarel <vindarel@mailz.org>"
   :license "MIT"
-  :version "0.14"
+  :version "0.15"
   :homepage "https://github.com/vindarel/cl-str"
   :bug-tracker "https://github.com/vindarel/cl-str/issues"
   :source-control (:git "git@github.com:vindarel/cl-str.git")
   :description "Modern, consistent and terse Common Lisp string manipulation library."
   :depends-on (:cl-ppcre
-               :cl-ppcre-unicode)
+               :cl-ppcre-unicode
+               :cl-change-case)
   :components ((:file "str"))
 
   :long-description
diff --git a/str.lisp b/str.lisp
index 796010b..58dabd7 100644
--- a/str.lisp
+++ b/str.lisp
@@ -1,7 +1,38 @@
 (in-package :cl-user)
+
 (defpackage str
   (:use :cl)
+  (:import-from :cl-change-case
+                :no-case
+                :camel-case
+                :dot-case
+                :header-case
+                :param-case
+                :pascal-case
+                :path-case
+                :sentence-case
+                :snake-case
+                :swap-case
+                :title-case
+                :constant-case)
   (:export
+   ;; cl-change-case functions:
+   ;; (we could use cl-reexport but we don't want Alexandria in the dependencies list)
+   :no-case
+   :camel-case
+   :dot-case
+   :header-case
+   :param-case
+   :pascal-case
+   :path-case
+   :sentence-case
+   :snake-case
+   :swap-case
+   :title-case
+   :constant-case
+
+   ;; ours:
+   :remove-punctuation
    :contains?
    :containsp
    :trim-left
@@ -13,7 +44,7 @@
    :split-omit-nulls
    :substring
    :shorten
-   :prune                               ;; "deprecated" in favor of shorten
+   :prune ;; "deprecated" in favor of shorten
    :repeat
    :replace-all
    :concat
@@ -76,18 +107,18 @@
    :*ellipsis*
    :version
    :+version+
-   :?
-   ))
+   :?))
 
 (in-package :str)
 
+
 (defparameter *ignore-case* nil)
 (defparameter *omit-nulls* nil)
 
 (defvar *whitespaces* '(#\Space #\Newline #\Backspace #\Tab
                         #\Linefeed #\Page #\Return #\Rubout))
 
-(defvar +version+ "0.14")
+(defvar +version+ "0.15")
 
 (defun version ()
   (print +version+))
@@ -584,3 +615,7 @@ Returns the string written to file."
 (defun upcase? (s)
   "alias for `upcasep'."
   (upcasep s))
+
+(defun remove-punctuation (s &key (replacement " "))
+  "Extract the letters from `s'. Use `replacement' for other characters."
+  (cl-change-case:no-case s :replacement replacement))