diff --git a/org.mamedev.MAME.metainfo.xml b/org.mamedev.MAME.metainfo.xml
index 9aa2df6..c9a5c4f 100644
--- a/org.mamedev.MAME.metainfo.xml
+++ b/org.mamedev.MAME.metainfo.xml
@@ -27,6 +27,7 @@
   <url type="homepage">https://www.mamedev.org</url>
   <launchable type="desktop-id">org.mamedev.MAME.desktop</launchable>
   <releases>
+    <release version="0.257" date="2023-07-28"/>
     <release version="0.256" date="2023-06-28"/>
     <release version="0.255" date="2023-05-31"/>
     <release version="0.254" date="2023-04-27"/>
diff --git a/org.mamedev.MAME.yaml b/org.mamedev.MAME.yaml
index ea0dbb1..2bd9506 100644
--- a/org.mamedev.MAME.yaml
+++ b/org.mamedev.MAME.yaml
@@ -57,8 +57,8 @@ modules:
       - cp -r samples/ ${FLATPAK_DEST}/share/mame/
     sources:
       - type: archive
-        url: https://github.com/mamedev/mame/archive/refs/tags/mame0256.tar.gz
-        sha256: 7523c46684043cc9e2af242aa7e31476b076fed492c3ae4ae0c964aafd65f659
+        url: https://github.com/mamedev/mame/archive/refs/tags/mame0257.tar.gz
+        sha256: e3107012ce80bff10cef7cab6ad8290f97cf1bc978e67ae806aa1a0c100daaa2
       - type: file
         path: mame16x16.png
       - type: file