diff --git a/bin/build-vendor-compat b/bin/build-vendor-compat
index 28a481367..5098a8bd9 100755
--- a/bin/build-vendor-compat
+++ b/bin/build-vendor-compat
@@ -5,7 +5,7 @@ set -e
 cd "${BASH_SOURCE%/*}/.."
 
 rm -rf build-vendor
-rm composer-*.lock
+rm -f composer-*.lock
 
 cp composer.json composer-compat.json
 
diff --git a/composer.json b/composer.json
index adc96a26a..2e3efb03d 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
     ],
     "require": {
         "php": ">=5.4.0",
-        "symfony/console": "^2.4.2|~3.0|~4.0",
+        "symfony/console": "~2.3.10|^2.4.2|~3.0|~4.0",
         "symfony/var-dumper": "~2.7|~3.0|~4.0",
         "nikic/php-parser": "~2.0|~3.0|~4.0",
         "dnoegel/php-xdg-base-dir": "0.1",
diff --git a/src/Shell.php b/src/Shell.php
index 96004e58d..43835d3d4 100644
--- a/src/Shell.php
+++ b/src/Shell.php
@@ -47,7 +47,7 @@
  */
 class Shell extends Application
 {
-    const VERSION = 'v0.9.0';
+    const VERSION = 'v0.9.1';
 
     const PROMPT      = '>>> ';
     const BUFF_PROMPT = '... ';