diff --git a/src/Form/GeshiFilterSettingsForm.php b/src/Form/GeshiFilterSettingsForm.php
index ddbf3a9..aea67ac 100644
--- a/src/Form/GeshiFilterSettingsForm.php
+++ b/src/Form/GeshiFilterSettingsForm.php
@@ -52,8 +52,9 @@ class GeshiFilterSettingsForm extends ConfigFormBase {
     $form['library'] = array(
       '#type' => 'fieldset',
       '#title' => defined('GESHI_VERSION') ? $this->t('GeSHi library version @version detected', array('@version' => GESHI_VERSION)) : $this->t('GeSHi library'),
-      '#description' => $this->t('The GeSHi filter requires the GeSHi library (which needs to be @downloaded and installed seperately).', array(
-        '@downloaded' => \Drupal::l($this->t('downloaded'), Url::fromUri('http://qbnz.com/highlighter/')),
+      '#description' => $this->t('The GeSHi filter requires the GeSHi library (which needs to be @downloaded and installed seperately). Please review the install instruction at @readme.', array(
+        '@downloaded' => $this->l($this->t('downloaded'), Url::fromUri('http://qbnz.com/highlighter/')),
+        '@readme' => $this->l($this->t('README.TXT'), Url::fromUri('http://cgit.drupalcode.org/geshifilter/tree/README.txt?h=8.x-1.x')),
       )),
       '#collapsible' => TRUE,
       '#collapsed' => $geshi_library['loaded'],
diff --git a/src/GeshiFilter.php b/src/GeshiFilter.php
index 1ada1e9..7f50ad8 100644
--- a/src/GeshiFilter.php
+++ b/src/GeshiFilter.php
@@ -4,6 +4,8 @@ namespace Drupal\geshifilter;
 
 use GeSHi;
 
+use Drupal\Core\Url;
+
 /**
  * Contains constantas and some helper functions.
  */
@@ -236,6 +238,10 @@ class GeshiFilter {
     else {
       $library['loaded'] = FALSE;
       $library['library path'] = '';
+      $library['error message'] = t('The GeSHi filter requires the GeSHi library (which needs to be @downloaded and installed seperately). Please review the install instruction at @readme.', array(
+        '@downloaded' => \Drupal::l(t('downloaded'), Url::fromUri('http://qbnz.com/highlighter/')),
+        '@readme' => \Drupal::l(t('README.TXT'), Url::fromUri('http://cgit.drupalcode.org/geshifilter/tree/README.txt?h=8.x-1.x')),
+      ));
     }
     return $library;
   }