This command is available sin Symfony 2.5

javiereguiluz · javiereguiluz · commit 211108584230 · 2014-12-14T20:01:31.000+01:00
diff --git a/book/security.rst b/book/security.rst
@@ -2058,8 +2058,8 @@ to work correctly. Just pass a file name to enable it::
 Checking Dependencies Security
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-.. versionadded:: 2.6
-    The ``security:check`` command was introduced in Symfony 2.6.
+.. versionadded:: 2.5
+    The ``security:check`` command was introduced in Symfony 2.5.
 
 When using lots of dependencies in your Symfony projects, odds are that some of
 them contain security vulnerabilities. That's why Symfony includes a command
