diff --git a/Directive.md b/Directive.md
index 787a9e3..aa11a6c 100644
--- a/Directive.md
+++ b/Directive.md
@@ -10,12 +10,12 @@ Supported directives are `disable` to disable warnings:
     # shellcheck disable=code[,code...]
     statement_where_warning_should_be_disabled
 
-`source` to tell ShellCheck where to find a sourced file:
+`source` to tell ShellCheck where to find a sourced file (since 0.4.0):
 
     # shellcheck source=src/examples/config.sh
     . "$(locate_config)"
 
-`shell`, as a top level directive, to specify the shell for a script (like the shebang, if you for any reason don't want to add one):
+`shell`, as a top level directive, to specify the shell for a script (similar to the shebang, if you for any reason don't want to add one) (since 0.4.4):
 
     # shellcheck shell=sh
     echo foo &> bar