diff --git a/ChangeLog.md b/ChangeLog.md
index b4a9bab199aa3..117c3b4d8eb69 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -27,6 +27,7 @@ See docs/process.md for more on how version tagging works.
   `--experimental-wasm-bulk-memory` flags when used with versions of node older
   than v16. (#26560)
 - SDL3 port updated from 3.2.30 to 3.4.2 (#26572)
+- libpng port updated from 1.6.55 to 1.6.56. (#26592)
 
 5.0.4 - 03/23/26
 ----------------
diff --git a/tools/ports/libpng.py b/tools/ports/libpng.py
index 7da6231c17f06..5737caba3fb90 100644
--- a/tools/ports/libpng.py
+++ b/tools/ports/libpng.py
@@ -6,8 +6,8 @@
 import os
 import shutil
 
-TAG = '1.6.55'
-HASH = '45d3c4c3bd3d22dd93026e1bdff8df8133459a2903fb70be178899a55d256bab55bb5c4220d790202fce578e346c040c5c00e1f004cf5c4dcbf387a30d43e701'
+TAG = '1.6.56'
+HASH = 'e9b7c90e5b29d877e0c0888fe35e5498ae513619943728d7a05269b261786c476808df06de460ec27f6d045cf7193a5e3656b95c553539b4edcdd2fd0c5fa422'
 
 deps = ['zlib']
 variants = {