diff --git a/3rdparty b/3rdparty
index f2974c2e72b..06ddcb5f830 160000
--- a/3rdparty
+++ b/3rdparty
@@ -1 +1 @@
-Subproject commit f2974c2e72b2ad5ab7ae745936c4d866405d2b61
+Subproject commit 06ddcb5f830abe40870c1738381a61d69e34006b
diff --git a/lib/composer/composer/ClassLoader.php b/lib/composer/composer/ClassLoader.php
index ac67d302a18..4626994fd4d 100644
--- a/lib/composer/composer/ClassLoader.php
+++ b/lib/composer/composer/ClassLoader.php
@@ -55,6 +55,7 @@ class ClassLoader
     private $classMap = array();
     private $classMapAuthoritative = false;
     private $missingClasses = array();
+    private $apcuPrefix;
 
     public function getPrefixes()
     {
@@ -271,6 +272,26 @@ class ClassLoader
         return $this->classMapAuthoritative;
     }
 
+    /**
+     * APCu prefix to use to cache found/not-found classes, if the extension is enabled.
+     *
+     * @param string|null $apcuPrefix
+     */
+    public function setApcuPrefix($apcuPrefix)
+    {
+        $this->apcuPrefix = function_exists('apcu_fetch') && ini_get('apc.enabled') ? $apcuPrefix : null;
+    }
+
+    /**
+     * The APCu prefix in use, or null if APCu caching is not enabled.
+     *
+     * @return string|null
+     */
+    public function getApcuPrefix()
+    {
+        return $this->apcuPrefix;
+    }
+
     /**
      * Registers this instance as an autoloader.
      *
@@ -313,11 +334,6 @@ class ClassLoader
      */
     public function findFile($class)
     {
-        // work around for PHP 5.3.0 - 5.3.2 https://bugs.php.net/50731
-        if ('\\' == $class[0]) {
-            $class = substr($class, 1);
-        }
-
         // class map lookup
         if (isset($this->classMap[$class])) {
             return $this->classMap[$class];
@@ -325,6 +341,12 @@ class ClassLoader
         if ($this->classMapAuthoritative || isset($this->missingClasses[$class])) {
             return false;
         }
+        if (null !== $this->apcuPrefix) {
+            $file = apcu_fetch($this->apcuPrefix.$class, $hit);
+            if ($hit) {
+                return $file;
+            }
+        }
 
         $file = $this->findFileWithExtension($class, '.php');
 
@@ -333,6 +355,10 @@ class ClassLoader
             $file = $this->findFileWithExtension($class, '.hh');
         }
 
+        if (null !== $this->apcuPrefix) {
+            apcu_add($this->apcuPrefix.$class, $file);
+        }
+
         if (false === $file) {
             // Remember that this class does not exist.
             $this->missingClasses[$class] = true;
diff --git a/tests/lib/App/AppStore/Fetcher/AppFetcherTest.php b/tests/lib/App/AppStore/Fetcher/AppFetcherTest.php
index aa0d50cac97..8d0e5d689f8 100644
--- a/tests/lib/App/AppStore/Fetcher/AppFetcherTest.php
+++ b/tests/lib/App/AppStore/Fetcher/AppFetcherTest.php
@@ -93,7 +93,7 @@ EOD;
 		$client
 			->expects($this->once())
 			->method('get')
-			->with('https://apps.nextcloud.com/api/v1/platform/11.0.0/apps.json')
+			->with('https://apps.nextcloud.com/api/v1/platform/11.0.1/apps.json')
 			->willReturn($response);
 		$response
 			->expects($this->once())
diff --git a/version.php b/version.php
index 9d31dd8b0e9..257fe0316cb 100644
--- a/version.php
+++ b/version.php
@@ -26,10 +26,10 @@
 // between betas, final and RCs. This is _not_ the public version number. Reset minor/patchlevel
 // when updating major/minor version number.
 
-$OC_Version = array(11, 0, 0, 10);
+$OC_Version = array(11, 0, 1, 0);
 
 // The human readable string
-$OC_VersionString = '11.0.0';
+$OC_VersionString = '11.0.1';
 
 $OC_VersionCanBeUpgradedFrom = array(9, 1);