diff --git a/modules/roblib_search_eds/src/Plugin/Block/RoblibSearchEdsArticles.php b/modules/roblib_search_eds/src/Plugin/Block/RoblibSearchEdsArticles.php
index 776e9bf..9ba2f9a 100644
--- a/modules/roblib_search_eds/src/Plugin/Block/RoblibSearchEdsArticles.php
+++ b/modules/roblib_search_eds/src/Plugin/Block/RoblibSearchEdsArticles.php
@@ -38,5 +38,16 @@ class RoblibSearchEdsArticles extends BlockBase {
       ],
     ];
   }
-  
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCacheMaxAge() {
+    // Reading dynamic content from external source so no caching.
+    if (\Drupal::currentUser()->isAnonymous()) {
+      // Anonymous user...
+      return 0;
+    }
+  }
+
 }
diff --git a/modules/roblib_search_eds/src/Plugin/Block/RoblibSearchEdsBooks.php b/modules/roblib_search_eds/src/Plugin/Block/RoblibSearchEdsBooks.php
index b58958c..b7334c8 100644
--- a/modules/roblib_search_eds/src/Plugin/Block/RoblibSearchEdsBooks.php
+++ b/modules/roblib_search_eds/src/Plugin/Block/RoblibSearchEdsBooks.php
@@ -38,6 +38,17 @@ class RoblibSearchEdsBooks extends BlockBase {
       ],
     ];
   }
-  
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCacheMaxAge() {
+    // Reading dynamic content from external source so no caching.
+    if (\Drupal::currentUser()->isAnonymous()) {
+      // Anonymous user...
+      return 0;
+    }
+  }
+
 
 }
diff --git a/modules/solr_site/src/Plugin/Block/RoblibSearchSolrsiteBestbet.php b/modules/solr_site/src/Plugin/Block/RoblibSearchSolrsiteBestbet.php
index cb01e27..5387834 100644
--- a/modules/solr_site/src/Plugin/Block/RoblibSearchSolrsiteBestbet.php
+++ b/modules/solr_site/src/Plugin/Block/RoblibSearchSolrsiteBestbet.php
@@ -36,5 +36,16 @@ class RoblibSearchSolrSiteBestbet extends BlockBase {
       ],
     ];
  }
- 
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCacheMaxAge() {
+    // Reading dynamic content from external source so no caching.
+    if (\Drupal::currentUser()->isAnonymous()) {
+      // Anonymous user...
+      return 0;
+    }
+  }:q
+
 }
diff --git a/modules/solr_site/src/Plugin/Block/RoblibSearchSolrsiteGeneral.php b/modules/solr_site/src/Plugin/Block/RoblibSearchSolrsiteGeneral.php
index a99feae..1df26aa 100644
--- a/modules/solr_site/src/Plugin/Block/RoblibSearchSolrsiteGeneral.php
+++ b/modules/solr_site/src/Plugin/Block/RoblibSearchSolrsiteGeneral.php
@@ -38,5 +38,16 @@ class RoblibSearchSolrsiteGeneral extends BlockBase {
       ],
     ];
  }
- 
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCacheMaxAge() {
+    // Reading dynamic content from external source so no caching.
+    if (\Drupal::currentUser()->isAnonymous()) {
+      // Anonymous user...
+      return 0;
+    }
+  }
+
 }