diff --git a/MDFormatter.php b/src/MDFormatter.php
similarity index 100%
rename from MDFormatter.php
rename to src/MDFormatter.php
diff --git a/MD_JAIL.php b/src/MD_JAIL.php
similarity index 100%
rename from MD_JAIL.php
rename to src/MD_JAIL.php
diff --git a/MD_STD.php b/src/MD_STD.php
similarity index 100%
rename from MD_STD.php
rename to src/MD_STD.php
diff --git a/MD_STD_CACHE.php b/src/MD_STD_CACHE.php
similarity index 100%
rename from MD_STD_CACHE.php
rename to src/MD_STD_CACHE.php
diff --git a/MD_STD_IN.php b/src/MD_STD_IN.php
similarity index 98%
rename from MD_STD_IN.php
rename to src/MD_STD_IN.php
index 6831f18..0bae377 100644
--- a/MD_STD_IN.php
+++ b/src/MD_STD_IN.php
@@ -5,8 +5,7 @@
 declare(strict_types = 1);
 
 /**
- * Standard class providing overrides of default PHP functions as static
- * functions.
+ * Encapsulates functions for handling inputs.
  */
 final class MD_STD_IN {
     /**
diff --git a/MD_STD_SEC.php b/src/MD_STD_SEC.php
similarity index 98%
rename from MD_STD_SEC.php
rename to src/MD_STD_SEC.php
index b9f92f3..9a3d794 100644
--- a/MD_STD_SEC.php
+++ b/src/MD_STD_SEC.php
@@ -5,7 +5,7 @@
 declare(strict_types = 1);
 
 /**
- * Class providing static functions with basic security operations.
+ * Gathers wrappers for handling basic security operations.
  */
 final class MD_STD_SEC {
     /**