bump 1.5.6 version
diff --git a/doc/source/changelog.rst b/doc/source/changelog.rst
index fb8cbc0..d29e837 100644
--- a/doc/source/changelog.rst
+++ b/doc/source/changelog.rst
@@ -5,6 +5,9 @@
========= ========== ========================================================
Version Date Changes
========= ========== ========================================================
+1.5.6 2018-07-30 * Fix, usage of integers as pillar keys
+ * Refactoring python codebase by @a-ovchinkonv
+ * New feature, "compose node name" from node subdirectory structure (by @gburiola)
1.5.5 2018-07 * Add immutable (constant) parameters
* Fixes
1.5.4 2018-05 * Add support for salt 2018.3