diff --git a/CHANGELOG b/CHANGELOG
index bd1868fe27c77b27647c18d52e3b725b7e021ce1..202f8ce34379a9f62bcd0df84d7d762123bc1c77 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,16 @@
+## Centreon 2.6.6
+
+#3793: Problems with host group creation
+#3812: Strange display of service group details page with Centreon 2.6.3
+#3824: PHP Warning: array_map(): Argument #2 should be an array
+#3840: Centreon 2.6.4 : Wrong reporting graph data with default user language fr_FR.UTF-8
+#3846: [2.6.5] CRSF Token critical: Impossible to upgrade a plugin
+#3847: [2.6.5] split component switch
+#3851: [2.6.5] split component switch, other problem
+#3852: [2.6.5] CSRF error appears in user massive change form
+#3854: Cannot add new macro after deleting all macros already created
+#3855: Cannot add new host template to host after deleting all templates
+
 ## Centreon 2.6.5
 
 #3831: XSS injection in object lists (ZSL-2015-5266)
diff --git a/doc/en/release_notes/centreon-2.6.6.rst b/doc/en/release_notes/centreon-2.6.6.rst
new file mode 100644
index 0000000000000000000000000000000000000000..24f0a910141bad409d72fc63c266d609b4fdf558
--- /dev/null
+++ b/doc/en/release_notes/centreon-2.6.6.rst
@@ -0,0 +1,30 @@
+==============
+Centreon 2.6.6
+==============
+
+Released October 29, 2015
+
+******
+Notice
+******
+If you are upgrading from a version prior to 2.6.0, make sure to go through all the release notes available
+`here <http://documentation.centreon.com/docs/centreon/en/latest/release_notes/index.html>`_.
+
+
+*********
+CHANGELOG
+*********
+
+Bug fixes
+=========
+
+- #3793: Problems with host group creation
+- #3812: Strange display of service group details page with Centreon 2.6.3
+- #3824: PHP Warning: array_map(): Argument #2 should be an array
+- #3840: Centreon 2.6.4 : Wrong reporting graph data with default user language fr_FR.UTF-8
+- #3846: [2.6.5] CRSF Token critical: Impossible to upgrade a plugin
+- #3847: [2.6.5] split component switch
+- #3851: [2.6.5] split component switch, other problem
+- #3852: [2.6.5] CSRF error appears in user massive change form
+- #3854: Cannot add new macro after deleting all macros already created
+- #3855: Cannot add new host template to host after deleting all templates
diff --git a/doc/fr/release_notes/centreon-2.6.6.rst b/doc/fr/release_notes/centreon-2.6.6.rst
new file mode 100644
index 0000000000000000000000000000000000000000..24f0a910141bad409d72fc63c266d609b4fdf558
--- /dev/null
+++ b/doc/fr/release_notes/centreon-2.6.6.rst
@@ -0,0 +1,30 @@
+==============
+Centreon 2.6.6
+==============
+
+Released October 29, 2015
+
+******
+Notice
+******
+If you are upgrading from a version prior to 2.6.0, make sure to go through all the release notes available
+`here <http://documentation.centreon.com/docs/centreon/en/latest/release_notes/index.html>`_.
+
+
+*********
+CHANGELOG
+*********
+
+Bug fixes
+=========
+
+- #3793: Problems with host group creation
+- #3812: Strange display of service group details page with Centreon 2.6.3
+- #3824: PHP Warning: array_map(): Argument #2 should be an array
+- #3840: Centreon 2.6.4 : Wrong reporting graph data with default user language fr_FR.UTF-8
+- #3846: [2.6.5] CRSF Token critical: Impossible to upgrade a plugin
+- #3847: [2.6.5] split component switch
+- #3851: [2.6.5] split component switch, other problem
+- #3852: [2.6.5] CSRF error appears in user massive change form
+- #3854: Cannot add new macro after deleting all macros already created
+- #3855: Cannot add new host template to host after deleting all templates
diff --git a/install.sh b/install.sh
index cf509ff52ddf74d498595d2e9514b5f591dda0ca..dd6c1361a84c4bcc9f18b100864df1cad808781a 100755
--- a/install.sh
+++ b/install.sh
@@ -50,7 +50,7 @@
 # -- on upgrade, overwrite existing ? backup ? 
 
 # Define centreon version
-version="2.6.5"
+version="2.6.6"
 
 # Debug
 #set -x