diff --git a/src/Composer/DependencyResolver/LocalRepoTransaction.php b/src/Composer/DependencyResolver/LocalRepoTransaction.php
index b22f555e5..de30cc977 100644
--- a/src/Composer/DependencyResolver/LocalRepoTransaction.php
+++ b/src/Composer/DependencyResolver/LocalRepoTransaction.php
@@ -23,6 +23,7 @@ use Composer\Semver\Constraint\Constraint;
 
 /**
  * @author Nils Adermann <naderman@naderman.de>
+ * @internal
  */
 class LocalRepoTransaction extends Transaction
 {
diff --git a/src/Composer/DependencyResolver/LockTransaction.php b/src/Composer/DependencyResolver/LockTransaction.php
index 0e0eb0c7a..fbe543522 100644
--- a/src/Composer/DependencyResolver/LockTransaction.php
+++ b/src/Composer/DependencyResolver/LockTransaction.php
@@ -22,6 +22,7 @@ use Composer\Test\Repository\ArrayRepositoryTest;
 
 /**
  * @author Nils Adermann <naderman@naderman.de>
+ * @internal
  */
 class LockTransaction extends Transaction
 {
diff --git a/src/Composer/DependencyResolver/Transaction.php b/src/Composer/DependencyResolver/Transaction.php
index a919238f6..f03419719 100644
--- a/src/Composer/DependencyResolver/Transaction.php
+++ b/src/Composer/DependencyResolver/Transaction.php
@@ -19,6 +19,7 @@ use Composer\Repository\PlatformRepository;
 
 /**
  * @author Nils Adermann <naderman@naderman.de>
+ * @internal
  */
 class Transaction
 {