diff --git a/Free Learning/CHANGEDB.php b/Free Learning/CHANGEDB.php
index 6afefea..fcb7254 100644
--- a/Free Learning/CHANGEDB.php	
+++ b/Free Learning/CHANGEDB.php	
@@ -2116,3 +2116,8 @@
 ++$count;
 $sql[$count][0] = '5.20.08';
 $sql[$count][1] = "";
+
+//v5.20.09
+++$count;
+$sql[$count][0] = '5.20.09';
+$sql[$count][1] = "";
diff --git a/Free Learning/CHANGELOG.txt b/Free Learning/CHANGELOG.txt
index 1cc8b4c..8239a4e 100644
--- a/Free Learning/CHANGELOG.txt	
+++ b/Free Learning/CHANGELOG.txt	
@@ -1,5 +1,9 @@
 CHANGELOG
 =========
+v5.20.09
+--------
+Fixed error exporting units that contain empty blocks
+
 v5.20.08
 --------
 Fix collaborator list for units with multiple prerequisites
diff --git a/Free Learning/manifest.php b/Free Learning/manifest.php
index 7ca712e..0aa164f 100644
--- a/Free Learning/manifest.php	
+++ b/Free Learning/manifest.php	
@@ -25,7 +25,7 @@
 $entryURL = 'units_browse.php';
 $type = 'Additional';
 $category = 'Learn';
-$version = '5.20.08';
+$version = '5.20.09';
 $author = 'Ross Parker';
 $url = 'http://rossparker.org/free-learning';
 
diff --git a/Free Learning/src/UnitExporter.php b/Free Learning/src/UnitExporter.php
index d4cd38d..b0b77e3 100644
--- a/Free Learning/src/UnitExporter.php	
+++ b/Free Learning/src/UnitExporter.php	
@@ -95,6 +95,8 @@ public function addUnitToExport($freeLearningUnitID)
         $blocks = $this->unitBlockGateway->selectBlocksByUnit($freeLearningUnitID)->fetchAll();
         foreach ($blocks as $index => $block) {
             $dom = new DOMDocument();
+            if (empty($blocks[$index]['contents'])) continue;
+            
             @$dom->loadHTML($blocks[$index]['contents']);
             foreach ($dom->getElementsByTagName('img') as $node) {
                 $src = $node->getAttribute('src');
diff --git a/Free Learning/version.php b/Free Learning/version.php
index fec6ee8..f70a3c3 100755
--- a/Free Learning/version.php	
+++ b/Free Learning/version.php	
@@ -20,5 +20,5 @@
 /**
  * Sets version information.
  */
-$moduleVersion = '5.20.08';
+$moduleVersion = '5.20.09';
 $coreVersion = '23.0.00';