diff --git a/CHANGELOG.md b/CHANGELOG.md
index c6761c0e9..84f9fd79a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,11 @@
   * Fixed suggest output being very spammy, it now is only one line long and shows more rarely
   * Fixed conflict rules like e.g. >=5 from matching dev-master, as it is not normalized to 9999999-dev internally anymore
 
+### [1.10.5] 2020-04-10
+
+  * Fixed self-update on PHP <5.6, seriously please upgrade people, it's time
+  * Fixed 1.10.2 regression with PATH resolution in scripts
+
 ### [1.10.4] 2020-04-09
 
   * Fixed 1.10.2 regression in path symlinking with absolute path repos
@@ -863,6 +868,7 @@
 
   * Initial release
 
+[1.10.5]: https://github.com/composer/composer/compare/1.10.4...1.10.5
 [1.10.4]: https://github.com/composer/composer/compare/1.10.3...1.10.4
 [1.10.3]: https://github.com/composer/composer/compare/1.10.2...1.10.3
 [1.10.2]: https://github.com/composer/composer/compare/1.10.1...1.10.2
diff --git a/src/Composer/Command/SelfUpdateCommand.php b/src/Composer/Command/SelfUpdateCommand.php
index 554be607e..3bc482e63 100644
--- a/src/Composer/Command/SelfUpdateCommand.php
+++ b/src/Composer/Command/SelfUpdateCommand.php
@@ -85,7 +85,7 @@ EOT
 
         // switch channel if requested
         $requestedChannel = null;
-        foreach (Versions::CHANNELS as $channel) {
+        foreach (Versions::$channels as $channel) {
             if ($input->getOption($channel)) {
                 $requestedChannel = $channel;
                 $versionsUtil->setChannel($channel);
diff --git a/src/Composer/EventDispatcher/EventDispatcher.php b/src/Composer/EventDispatcher/EventDispatcher.php
index 463fd46d4..6cbb0c314 100644
--- a/src/Composer/EventDispatcher/EventDispatcher.php
+++ b/src/Composer/EventDispatcher/EventDispatcher.php
@@ -248,6 +248,13 @@ class EventDispatcher
                     }
                 }
 
+                // if composer is being executed, make sure it runs the expected composer from current path
+                // resolution, even if bin-dir contains composer too because the project requires composer/composer
+                // see https://github.com/composer/composer/issues/8748
+                if (substr($exec, 0, 9) === 'composer ') {
+                    $exec = $this->getPhpExecCommand() . ' ' . ProcessExecutor::escape(getenv('COMPOSER_BINARY')) . substr($exec, 8);
+                }
+
                 if (0 !== ($exitCode = $this->executeTty($exec))) {
                     $this->io->writeError(sprintf('<error>Script %s handling the %s event returned with error code '.$exitCode.'</error>', $callable, $event->getName()), true, IOInterface::QUIET);
 
@@ -535,10 +542,7 @@ class EventDispatcher
         if (is_dir($binDir)) {
             $binDir = realpath($binDir);
             if (isset($_SERVER[$pathStr]) && !preg_match('{(^|'.PATH_SEPARATOR.')'.preg_quote($binDir).'($|'.PATH_SEPARATOR.')}', $_SERVER[$pathStr])) {
-                // prepend the COMPOSER_BINARY dir to the path to make sure that scripts running "composer" will run the expected composer
-                // from current path resolution, even if bin-dir contains composer too because the project requires composer/composer
-                // see https://github.com/composer/composer/issues/8748
-                $_SERVER[$pathStr] = dirname(getenv('COMPOSER_BINARY')).PATH_SEPARATOR.$binDir.PATH_SEPARATOR.getenv($pathStr);
+                $_SERVER[$pathStr] = $binDir.PATH_SEPARATOR.getenv($pathStr);
                 putenv($pathStr.'='.$_SERVER[$pathStr]);
             }
         }
diff --git a/src/Composer/SelfUpdate/Versions.php b/src/Composer/SelfUpdate/Versions.php
index 4d89e5ecb..a03a75054 100644
--- a/src/Composer/SelfUpdate/Versions.php
+++ b/src/Composer/SelfUpdate/Versions.php
@@ -21,7 +21,7 @@ use Composer\Json\JsonFile;
  */
 class Versions
 {
-    const CHANNELS = array('stable', 'preview', 'snapshot', '1', '2');
+    public static $channels = array('stable', 'preview', 'snapshot', '1', '2');
 
     private $httpDownloader;
     private $config;
@@ -52,8 +52,8 @@ class Versions
 
     public function setChannel($channel)
     {
-        if (!in_array($channel, self::CHANNELS, true)) {
-            throw new \InvalidArgumentException('Invalid channel '.$channel.', must be one of: ' . implode(', ', self::CHANNELS));
+        if (!in_array($channel, self::$channels, true)) {
+            throw new \InvalidArgumentException('Invalid channel '.$channel.', must be one of: ' . implode(', ', self::$channels));
         }
 
         $channelFile = $this->config->get('home').'/update-channel';