diff --git a/install.sh b/install.sh
index 0815715..b453193 100755
--- a/install.sh
+++ b/install.sh
@@ -129,13 +129,13 @@ install_codegraph() {
 
 install_kotlin_lsp() {
 	require_brew || return 1
-	brew install JetBrains/utils/kotlin-lsp || return 1
+	HOMEBREW_NO_ASK=1 brew install JetBrains/utils/kotlin-lsp || return 1
 	command -v kotlin-lsp >/dev/null 2>&1
 }
 
 install_java_21() {
 	require_brew || return 1
-	brew install openjdk@21 || return 1
+	HOMEBREW_NO_ASK=1 brew install openjdk@21 || return 1
 	java_home=$(brew --prefix openjdk@21 2>/dev/null) || return 1
 	PATH="$java_home/bin:$PATH"
 	export PATH
@@ -148,7 +148,7 @@ install_java_21() {
 
 install_jdtls() {
 	require_brew || return 1
-	brew install jdtls || return 1
+	HOMEBREW_NO_ASK=1 brew install jdtls || return 1
 	command -v jdtls >/dev/null 2>&1
 }
 
@@ -171,7 +171,7 @@ install_kitty() {
 	case $(uname -s) in
 		Darwin)
 			require_brew || return 1
-			brew install --cask kitty || return 1
+			HOMEBREW_NO_ASK=1 brew install --cask kitty || return 1
 			;;
 		*)
 			if ! command -v curl >/dev/null 2>&1; then
diff --git a/update.sh b/update.sh
index 111f595..d7fd1fd 100755
--- a/update.sh
+++ b/update.sh
@@ -177,7 +177,7 @@ update_brew_formula_if_installed() {
 			say "✓ $description 已是最新版本。"
 		else
 			say "发现 $description 有新版本，正在升级。"
-			brew upgrade "$formula" || record_update_failure "$description"
+			HOMEBREW_NO_ASK=1 brew upgrade --formula "$formula" || record_update_failure "$description"
 		fi
 	elif command -v "$command_name" >/dev/null 2>&1; then
 		say "- $description 已安装，但不由 Homebrew 管理，已保留现有安装。"
@@ -228,7 +228,7 @@ update_kitty() {
 					say "✓ Kitty 已是最新版本。"
 				else
 					say "发现 Kitty 有新版本，正在升级。"
-					brew upgrade --cask kitty || record_update_failure "Kitty"
+					HOMEBREW_NO_ASK=1 brew upgrade --cask kitty || record_update_failure "Kitty"
 				fi
 			else
 				record_update_failure "Kitty"