diff --git a/CHANGELOG b/CHANGELOG
index dca12d2..8007f0a 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -2,6 +2,7 @@ codebird-php - changelog
 ========================
 
 2.3.7 (not yet released)
++ Add contributing guidelines
 
 2.3.6 (2013-05-12)
 + Add backslash to stdClass construction, due to namespace
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..29e2443
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,11 @@
+### Which branch?
+- Bugs are fixed in the latest QA_* branch, please base your bugfix pull requests on this branch.
+- New features are added to the master branch, please base your feature-add pull requests on that branch.
+
+### Code style
+- Please use 4 soft spaces per indent level.
+- Take a look at the coding style used in codebird.php and apply the same convention to your contributed code.
+The styleguide is also available online at http://pear.php.net/manual/en/standards.php.
+
+### License
+- Code contributed by you will get the same license as Codebird itself, that is, GPU General Public License V3.