diff --git a/README.md b/README.md
index 9de59dff..a36a25e2 100644
--- a/README.md
+++ b/README.md
@@ -38,9 +38,13 @@ PhpSpreadsheet is a library written in pure PHP and providing a set of classes t
  * PHP extension php_xml enabled
  * PHP extension php_gd2 enabled (optional, but required for exact column width autocalculation)
 
+*Note:* PHP 5.6.29 has [a bug](https://bugs.php.net/bug.php?id=735300) that
+prevents SQLite3 caching to work correctly. Use a newer (or older) versions of
+PHP if you need SQLite3 caching.
+
 ## PHP version support
 
- * Support for PHP versions will only be maintained for a period of six months beyond the end-of-life of that PHP version
+Support for PHP versions will only be maintained for a period of six months beyond the end-of-life of that PHP version
 
 ## Want to contribute?
 
diff --git a/docs/index.md b/docs/index.md
index 3d4a01ba..fb0e1ecd 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -18,6 +18,10 @@ The following software is required to develop using PhpSpreadsheet:
 -   PHP extension php\_xml enabled
 -   PHP extension php\_gd2 enabled (if not compiled in)
 
+*Note:* PHP 5.6.29 has [a bug](https://bugs.php.net/bug.php?id=735300) that
+prevents SQLite3 caching to work correctly. Use a newer (or older) versions of
+PHP if you need SQLite3 caching.
+
 ## Installation instructions
 
 Installation is quite easy: copy the contents of the Classes folder to