diff --git a/composer.json b/composer.json
index 4e563b4f8..5ac821d0f 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
         "php": ">=5.3.9",
         "symfony/console": "~2.3.10|^2.4.2|~3.0",
         "symfony/var-dumper": "~2.7|~3.0",
-        "nikic/php-parser": "~1.2.1",
+        "nikic/php-parser": "^1.2.1",
         "dnoegel/php-xdg-base-dir": "0.1",
         "jakub-onderka/php-console-highlighter": "0.3.*"
     },
diff --git a/src/Psy/Shell.php b/src/Psy/Shell.php
index a8a0ebbb4..ff3f0aa75 100644
--- a/src/Psy/Shell.php
+++ b/src/Psy/Shell.php
@@ -41,7 +41,7 @@
  */
 class Shell extends Application
 {
-    const VERSION = 'v0.5.0';
+    const VERSION = 'v0.5.1';
 
     const PROMPT      = '>>> ';
     const BUFF_PROMPT = '... ';