diff --git a/src/Base.php b/src/Base.php
index e63c256..11e95e5 100644
--- a/src/Base.php
+++ b/src/Base.php
@@ -2,4 +2,7 @@
 
 namespace Graphp\Algorithms;
 
+/**
+ * @deprecated
+ */
 abstract class Base{ }
diff --git a/src/BaseDual.php b/src/BaseDual.php
index a3fa2f0..87b1b71 100644
--- a/src/BaseDual.php
+++ b/src/BaseDual.php
@@ -11,6 +11,7 @@
  * Abstract base class for algorithms that operate on a given Set instance
  *
  * @see Set
+ * @deprecated
  */
 abstract class BaseDual extends Base
 {
diff --git a/src/BaseGraph.php b/src/BaseGraph.php
index 348c941..efad831 100644
--- a/src/BaseGraph.php
+++ b/src/BaseGraph.php
@@ -7,6 +7,8 @@
 
 /**
  * Abstract base class for algorithms that operate on a given Graph instance
+ *
+ * @deprecated
  */
 abstract class BaseGraph extends Base
 {
diff --git a/src/BaseVertex.php b/src/BaseVertex.php
index 1760ff1..112fe06 100644
--- a/src/BaseVertex.php
+++ b/src/BaseVertex.php
@@ -7,6 +7,8 @@
 
 /**
  * Abstract base class for algorithms that operate on a given Vertex instance
+ *
+ * @deprecated
  */
 abstract class BaseVertex extends Base
 {