diff --git a/core/themes/classy/templates/block/block--local-actions-block.html.twig b/core/themes/classy/templates/block/block--local-actions-block.html.twig
index 2a0f5c4..dbe2557 100644
--- a/core/themes/classy/templates/block/block--local-actions-block.html.twig
+++ b/core/themes/classy/templates/block/block--local-actions-block.html.twig
@@ -1,4 +1,4 @@
-{% extends "@block/block.html.twig" %}
+{% extends "@stable/block/block.html.twig" %}
 {#
 /**
  * @file
diff --git a/core/themes/classy/templates/block/block--local-tasks-block.html.twig b/core/themes/classy/templates/block/block--local-tasks-block.html.twig
index a191c60..ff960a5 100644
--- a/core/themes/classy/templates/block/block--local-tasks-block.html.twig
+++ b/core/themes/classy/templates/block/block--local-tasks-block.html.twig
@@ -1,4 +1,4 @@
-{% extends "@block/block.html.twig" %}
+{% extends "@stable/block/block.html.twig" %}
 {#
 /**
  * @file
diff --git a/core/themes/seven/templates/block--local-actions-block.html.twig b/core/themes/seven/templates/block--local-actions-block.html.twig
index 6539758..bae3a53 100644
--- a/core/themes/seven/templates/block--local-actions-block.html.twig
+++ b/core/themes/seven/templates/block--local-actions-block.html.twig
@@ -1,4 +1,4 @@
-{% extends "@block/block.html.twig" %}
+{% extends "@stable/block/block.html.twig" %}
 {#
 /**
  * @file