diff --git a/h5p.api.php b/h5p.api.php
index ba3f1ca6c04908262df25455e77aa9d043a60acd..9737164c509d4a9891fec77c81290aa1af61f968 100644
--- a/h5p.api.php
+++ b/h5p.api.php
@@ -28,9 +28,9 @@ function hook_h5p_semantics_alter(&$semantics, $machine_name, $major_version, $m
 
 /**
  * Alter an H5Ps parameters
- * 
+ *
  * May be used to alter the content itself or the behaviour of the H5P
- * 
+ *
  * @param type $filtered
  *  json object
  */
@@ -52,7 +52,7 @@ function hook_h5p_filtered_params_alter(&$filtered) {
 
 /**
  * Add styles to H5Ps
- * 
+ *
  * @param array $styles
  *  Array of objects with properties path and version. Version is on the form
  *  ?ver=1.0.2 and is used as a cache buster
@@ -75,7 +75,7 @@ function hook_h5p_styles_alter(&$styles, $libraries, $mode) {
 
 /**
  * Add scripts to h5ps
- * 
+ *
  * @param array $scripts
  *  Array of objects with properties path and version. Version is on the form
  *  ?ver=1.0.2 and is used as a cache buster
@@ -96,4 +96,17 @@ function hook_h5p_scripts_alter(&$scripts, $libraries, $mode) {
   }
 }
 
+/**
+ * Hook is invoked whenever an H5P library has been installed/updated. It is created
+ * to be able to run other actions, not to alter input data.
+ *
+ * @param array $libraryData
+ *  This associative array contains everything found in library.json
+ * @param boolean $isNew
+ *  If this is a new library, this will be TRUE, otherwise FALSE
+ */
+function hook_h5p_library_installed($libraryData, $isNew) {
+  $machineName = $libraryData['machineName'];
+}
+
 ?>
diff --git a/h5p.classes.inc b/h5p.classes.inc
index eb643d776fe7b8e740144b96724b058e492927c6..5cb68256f4193d0f2b3aebd82f5746fe8f67513a 100644
--- a/h5p.classes.inc
+++ b/h5p.classes.inc
@@ -335,6 +335,12 @@ class H5PDrupal implements H5PFrameworkInterface {
       $libraryData['majorVersion'] . '.' . $libraryData['minorVersion']
     );
 
+    // Invoke h5p_library_installed hook for each library that has
+    // been installed
+    if (sizeof(module_implements('h5p_library_installed')) > 0) {
+      module_invoke_all('h5p_library_installed', $libraryData, $new);
+    }
+
     db_delete('h5p_libraries_languages')
     ->condition('library_id', $libraryData['libraryId'])
     ->execute();