diff --git a/update.sh b/update.sh
new file mode 100644
index 0000000..abbfee3
--- /dev/null
+++ b/update.sh
@@ -0,0 +1,22 @@
+#!/bin/bash
+
+if [ "$#" -ne 3 ]; then
+    echo "Usage: $0 <mnemonic> <wallet> <rpc_url>"
+    exit 1
+fi
+
+MNEMONIC=$1
+WALLET=$2
+RPC_URL=$3
+
+# List of files
+FILES=(
+    "./config.json"
+)
+
+for FILE in "${FILES[@]}"; do
+    EXPANDED_FILE=$(eval echo "$FILE")
+    sed -i "s|###MNEMONIC###|$MNEMONIC|g" "$EXPANDED_FILE"
+    sed -i "s|###WALLET###|$WALLET|g" "$EXPANDED_FILE"
+    sed -i "s|###RPC_URL###|$RPC_URL|g" "$EXPANDED_FILE"
+done