diff --git a/package.xml b/package.xml
index f9fd929..c40e840 100644
--- a/package.xml
+++ b/package.xml
@@ -33,11 +33,11 @@
   <email>wjx@php.net</email>
   <active>yes</active>
  </lead>
- <date>2023-05-15</date>
+ <date>2024-08-28</date>
  <time>00:00:00</time>
  <version>
-  <release>1.5.5</release>
-  <api>1.5.5</api>
+  <release>1.5.6</release>
+  <api>1.5.6</api>
  </version>
  <stability>
   <release>stable</release>
@@ -45,7 +45,7 @@
  </stability>
  <license uri="https://github.com/viest/php-ext-excel-export/blob/master/LICENSE">BSD license</license>
  <notes>
-- Feat: static built.
+- Fix: format resource memory leak.
  </notes>
  <contents>
   <dir name="/">
@@ -318,6 +318,22 @@
   <configureoption default="yes" name="enable-reader" prompt="enable reader supports?" />
  </extsrcrelease>
  <changelog>
+  <release>
+   <date>2023-05-15</date>
+   <time>00:00:00</time>
+   <version>
+    <release>1.5.5</release>
+    <api>1.5.5</api>
+   </version>
+   <stability>
+    <release>stable</release>
+    <api>stable</api>
+   </stability>
+   <license uri="https://github.com/viest/php-ext-excel-export/blob/master/LICENSE">BSD license</license>
+   <notes>
+    - Feat: static built.
+   </notes>
+  </release>
   <release>
    <date>2023-03-02</date>
    <time>00:00:00</time>
diff --git a/php_xlswriter.h b/php_xlswriter.h
index bb7155f..eb8a4d5 100644
--- a/php_xlswriter.h
+++ b/php_xlswriter.h
@@ -18,7 +18,7 @@
 extern zend_module_entry xlswriter_module_entry;
 #define phpext_xlswriter_ptr &xlswriter_module_entry
 
-#define PHP_XLSWRITER_VERSION "1.5.5"
+#define PHP_XLSWRITER_VERSION "1.5.6"
 #define PHP_XLSWRITER_AUTHOR  "Jiexing.Wang (wjx@php.net)"
 
 extern int le_xls_writer;