diff --git a/.gitignore b/.gitignore
index 563fe83..1a08248 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,3 +18,4 @@ clog
 /composer-1.6.1-9445e12.tgz
 /composer-1.6.2-db191ab.tgz
 /composer-1.6.3-88a69fd.tgz
+/composer-1.6.4-86ad51e.tgz
diff --git a/composer.spec b/composer.spec
index 5cb4cd7..5d9f8a3 100644
--- a/composer.spec
+++ b/composer.spec
@@ -10,7 +10,7 @@
 # For compatibility with SCL
 %undefine __brp_mangle_shebangs
 
-%global gh_commit    88a69fda0f2187ad8714cedffd7a8872dceaa4c2
+%global gh_commit    86ad51e8a3c64c9782446aae740a61fc6faa2522
 %global gh_short     %(c=%{gh_commit}; echo ${c:0:7})
 %global gh_branch    1.0-dev
 %global gh_owner     composer
@@ -18,7 +18,7 @@
 %global with_tests   %{?_without_tests:0}%{!?_without_tests:1}
 %global api_version  1.1.0
 
-%global upstream_version 1.6.3
+%global upstream_version 1.6.4
 #global upstream_prever  RC
 
 %if 0
@@ -30,7 +30,7 @@
 
 Name:           composer
 Version:        %{upstream_version}%{?upstream_prever:~%{upstream_prever}}
-Release:        4%{?dist}
+Release:        1%{?dist}
 Summary:        Dependency Manager for PHP
 
 Group:          Development/Libraries
@@ -285,6 +285,9 @@ exit $ret
 
 
 %changelog
+* Mon Apr 16 2018 Remi Collet <remi@remirepo.net> - 1.6.4-1
+- update to 1.6.4
+
 * Tue Feb 20 2018 Remi Collet <remi@remirepo.net> - 1.6.3-4
 - switch to Symfony2 only
 
diff --git a/sources b/sources
index 48e9b06..2717e6f 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (composer-1.6.3-88a69fd.tgz) = c9e74f585c858fc0d5e26f30585ab595099dbc3020b7fd02eefd117875d07bc4a6da7a214160991b26510996968c471477bc7dc7d4b1e1d03162ed6d0da1a0f3
+SHA512 (composer-1.6.4-86ad51e.tgz) = 81bd38b44b03f43343ac7a5cbe094d5199dba33e0d4a208837e930a44cea94d58ddfbf339b8424e7db19c58f977c180d490306f316375eb5cf2d73f4c1970ee3