diff --git a/resources/README.md b/resources/README.md
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--- a/resources/README.md
+++ b/resources/README.md
@@ -1,3 +1,12 @@
 # Resources
 
-Files used for different purpose like tests.
\ No newline at end of file
+Files used for different purpose like tests.
+
+## metadata.scale
+
+To generate it for GDev:
+
+    cargo run -- --dev --tmp
+    subxt metadata -f bytes > resources/metadata.scale
+
+See [Upgrade metadata](../end2end-tests/README.md#upgrade-metadata) for more details.
diff --git a/resources/metadata.scale b/resources/metadata.scale
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Binary files a/resources/metadata.scale and b/resources/metadata.scale differ