diff --git a/doc/04-schema.md b/doc/04-schema.md
index d096ad3b5..05c7cc960 100644
--- a/doc/04-schema.md
+++ b/doc/04-schema.md
@@ -321,7 +321,7 @@ The following options are supported:
   different directory if you want to.
 * **bin-dir:** Defaults to `vendor/bin`. If a project includes binaries, they
   will be symlinked into this directory.
-* **process-timeout:** Defaults to `60`. The duration processes like git clones
+* **process-timeout:** Defaults to `300`. The duration processes like git clones
   can run before Composer assumes they died out. You may need to make this
   higher if you have a slow connection or huge vendors.
 
diff --git a/src/Composer/Factory.php b/src/Composer/Factory.php
index a9b990f2a..cf70c4c74 100644
--- a/src/Composer/Factory.php
+++ b/src/Composer/Factory.php
@@ -52,7 +52,7 @@ class Factory
         // Configuration defaults
         $composerConfig = array(
             'vendor-dir' => 'vendor',
-            'process-timeout' => 60,
+            'process-timeout' => 300,
         );
 
         $packageConfig = $file->read();
diff --git a/src/Composer/Util/ProcessExecutor.php b/src/Composer/Util/ProcessExecutor.php
index fef4de96a..5bce6c73c 100644
--- a/src/Composer/Util/ProcessExecutor.php
+++ b/src/Composer/Util/ProcessExecutor.php
@@ -19,7 +19,7 @@ use Symfony\Component\Process\Process;
  */
 class ProcessExecutor
 {
-    static protected $timeout = 60;
+    static protected $timeout = 300;
 
     /**
      * runs a process on the commandline