diff --git a/update.sh b/update.sh
new file mode 100644
index 0000000..cdc05cf
--- /dev/null
+++ b/update.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+
+if [ "$#" -ne 2 ]; then
+    echo "Usage: $0 <wallet_address> <private_key>"
+    exit 1
+fi
+
+WALLET_ADDRESS=$1
+PRIVATE_KEY=$2
+
+# Список файлов
+FILES=(
+    "./projects/hello-world/container/config.json"
+    "./projects/hello-world/contracts/Makefile"
+)
+
+for FILE in "${FILES[@]}"; do
+    EXPANDED_FILE=$(eval echo "$FILE")
+    sed -i "s/###WALLET_ADDRESS###/$WALLET_ADDRESS/g" "$EXPANDED_FILE"
+    sed -i "s/###PRIVATE_KEY###/$PRIVATE_KEY/g" "$EXPANDED_FILE"
+done