diff --git a/CHANGELOG.md b/CHANGELOG.md
index a994d54fd..23f072d5a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,7 +8,9 @@
     * Added new `Grav\Framework\File\Formatter` classes for encoding/decoding YAML, Markdown, JSON, INI and PHP serialized strings
     * Added `Grav\Common\Media` interfaces and trait; use those in `Page` and `Media` classes 
     * Added `Grav\Common\Page` interface to allow custom page types in the future
-
+1. [](#bugfix)
+    * Fixed bug in `ContentBlock` serialization
+    
 # v1.4.4
 ## 04/12/2018
 
diff --git a/system/src/Grav/Framework/ContentBlock/ContentBlock.php b/system/src/Grav/Framework/ContentBlock/ContentBlock.php
index 6229b8151..626e6a2f9 100644
--- a/system/src/Grav/Framework/ContentBlock/ContentBlock.php
+++ b/system/src/Grav/Framework/ContentBlock/ContentBlock.php
@@ -222,7 +222,7 @@ protected function generateId()
      */
     protected function checkVersion(array $serialized)
     {
-        $version = isset($serialized['_version']) ? (string) $serialized['_version'] : '1';
+        $version = isset($serialized['_version']) ? (int) $serialized['_version'] : 1;
         if ($version !== $this->version) {
             throw new \RuntimeException(sprintf('Unsupported version %s', $version));
         }
diff --git a/system/src/Grav/Framework/ContentBlock/HtmlBlock.php b/system/src/Grav/Framework/ContentBlock/HtmlBlock.php
index 976018a0e..3fd345b8c 100644
--- a/system/src/Grav/Framework/ContentBlock/HtmlBlock.php
+++ b/system/src/Grav/Framework/ContentBlock/HtmlBlock.php
@@ -15,6 +15,7 @@
  */
 class HtmlBlock extends ContentBlock implements HtmlBlockInterface
 {
+    protected $version = 1;
     protected $frameworks = [];
     protected $styles = [];
     protected $scripts = [];