diff --git a/bin/check-version b/bin/check-version
index 23f0efa6..7f2c41e5 100755
--- a/bin/check-version
+++ b/bin/check-version
@@ -9,10 +9,16 @@ TAG_VERSION="${1:-${GITHUB_REF#refs/tags/}}"
 
 # Stable tag from readme.txt
 README_VERSION=$(grep -m 1 "^Stable tag:" readme.txt | awk '{print $3}')
+SOURCE_VERSION=$(grep "Version:" tiny-compress-images.php | head -n 1 | cut -d ':' -f 2 | xargs)
 
 if [ "$TAG_VERSION" != "$README_VERSION" ]; then
     echo "Error: Tag: $TAG_VERSION, readme.txt: $README_VERSION"
     exit 1
 fi
 
+if [ "$TAG_VERSION" != "$SOURCE_VERSION" ]; then
+    echo "Error: Tag: $TAG_VERSION, tiny-compress-images.php: $SOURCE_VERSION"
+    exit 1
+fi
+
 echo "Version matches git release"
diff --git a/readme.txt b/readme.txt
index 755a529b..4a4b50e1 100644
--- a/readme.txt
+++ b/readme.txt
@@ -4,7 +4,7 @@ Donate link: https://tinypng.com/
 Tags: compress images, compression, image size, page speed, performance
 Requires at least: 4.0
 Tested up to: 6.9
-Stable tag: 3.6.11
+Stable tag: 3.6.12
 License: GPLv2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
 
@@ -174,6 +174,10 @@ A: You can upgrade to a paid account by adding your *Payment details* on your [a
 A: When the conversion feature is enabled (to convert images to AVIF or WebP), each image will use double the number of credits: one for compression and one for format conversion.
 
 == Changelog ==
+= 3.6.12 =
+* chore: updated tiny package to 1.6.4
+* fix: resolved warning when img tag was missing src attribute
+
 = 3.6.9 =
 * fix: prevent picture element on product pages (WooCommerce)
 
diff --git a/tiny-compress-images.php b/tiny-compress-images.php
index 74341830..6576e7dc 100644
--- a/tiny-compress-images.php
+++ b/tiny-compress-images.php
@@ -2,7 +2,7 @@
 /**
  * Plugin Name: TinyPNG - JPEG, PNG & WebP image compression
  * Description: Speed up your website. Optimize your JPEG, PNG, and WebP images automatically with TinyPNG.
- * Version: 3.6.11
+ * Version: 3.6.12
  * Author: TinyPNG
  * Author URI: https://tinypng.com
  * Text Domain: tiny-compress-images