diff --git a/add_wallet_column.sql b/add_wallet_column.sql
new file mode 100644
index 00000000..44cec478
--- /dev/null
+++ b/add_wallet_column.sql
@@ -0,0 +1,6 @@
+-- Add wallet_address column to users table
+ALTER TABLE public.users 
+ADD COLUMN IF NOT EXISTS wallet_address TEXT;
+
+-- Add comment to column
+COMMENT ON COLUMN public.users.wallet_address IS 'Polkadot/Substrate wallet address for blockchain transactions';