core/modules/book/src/Plugin/Block/BookNavigationBlock.php     | 2 +-
 core/modules/system/src/Plugin/Block/SystemBreadcrumbBlock.php | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/core/modules/book/src/Plugin/Block/BookNavigationBlock.php b/core/modules/book/src/Plugin/Block/BookNavigationBlock.php
index 30153be..1a68622 100644
--- a/core/modules/book/src/Plugin/Block/BookNavigationBlock.php
+++ b/core/modules/book/src/Plugin/Block/BookNavigationBlock.php
@@ -193,7 +193,7 @@ public function getCacheContexts() {
   /**
    * {@inheritdoc}
    *
-   * @todo Make cacheable as part of https://drupal.org/node/1805054
+   * @todo Make cacheable in https://www.drupal.org/node/2483181
    */
   public function getCacheMaxAge() {
     return 0;
diff --git a/core/modules/system/src/Plugin/Block/SystemBreadcrumbBlock.php b/core/modules/system/src/Plugin/Block/SystemBreadcrumbBlock.php
index b0cfe9a..c7629f0 100644
--- a/core/modules/system/src/Plugin/Block/SystemBreadcrumbBlock.php
+++ b/core/modules/system/src/Plugin/Block/SystemBreadcrumbBlock.php
@@ -87,7 +87,7 @@ public function build() {
   /**
    * {@inheritdoc}
    *
-   * @todo Make cacheable as part of https://drupal.org/node/1805054
+   * @todo Make cacheable in https://www.drupal.org/node/2483183
    */
   public function getCacheMaxAge() {
     return 0;