diff --git a/src/Deployer/DefaultDeployer.php b/src/Deployer/DefaultDeployer.php
index fa28adc..5ae1bb9 100644
--- a/src/Deployer/DefaultDeployer.php
+++ b/src/Deployer/DefaultDeployer.php
@@ -337,11 +337,24 @@ private function doInstallDependencies(): void
     {
         if (true === $this->getConfig(Option::updateRemoteComposerBinary)) {
             $this->log('<h2>Self Updating the Composer binary</>');
-            $this->runRemote(sprintf('%s self-update', $this->getConfig(Option::remoteComposerBinaryPath)));
+            $this->runRemote(
+                sprintf(
+                    '%s %s self-update',
+                    $this->getConfig(Option::remotePhpBinaryPath),
+                    $this->getConfig(Option::remoteComposerBinaryPath)
+                )
+            );
         }
 
         $this->log('<h2>Installing Composer dependencies</>');
-        $this->runRemote(sprintf('%s install %s', $this->getConfig(Option::remoteComposerBinaryPath), $this->getConfig(Option::composerInstallFlags)));
+        $this->runRemote(
+            sprintf(
+                '%s %s install %s',
+                $this->getConfig(Option::remotePhpBinaryPath),
+                $this->getConfig(Option::remoteComposerBinaryPath),
+                $this->getConfig(Option::composerInstallFlags)
+            )
+        );
     }
 
     private function doInstallWebAssets(): void
@@ -390,7 +403,14 @@ private function doClearControllers(): void
     private function doOptimizeComposer(): void
     {
         $this->log('<h2>Optimizing Composer autoloader</>');
-        $this->runRemote(sprintf('%s dump-autoload %s', $this->getConfig(Option::remoteComposerBinaryPath), $this->getConfig(Option::composerOptimizeFlags)));
+        $this->runRemote(
+            sprintf(
+                '%s %s dump-autoload %s',
+                $this->getConfig(Option::remotePhpBinaryPath),
+                $this->getConfig(Option::remoteComposerBinaryPath),
+                $this->getConfig(Option::composerOptimizeFlags)
+            )
+        );
     }
 
     private function doCreateSymlink(): void