diff --git a/Dockerfile b/Dockerfile
index 8b24b7d..515d1ac 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -20,7 +20,7 @@ RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-w -s" -o birthdays-app ./cmd/ap
 FROM alpine:latest
 
 # Install CA certificates for HTTPS connections
-RUN apk --no-cache add ca-certificates
+RUN apk --no-cache --no-scripts add ca-certificates
 
 WORKDIR /app
 
diff --git a/internal/bot/bot.go b/internal/bot/bot.go
index 8bfb781..7cb8062 100644
--- a/internal/bot/bot.go
+++ b/internal/bot/bot.go
@@ -208,7 +208,12 @@ func (b *Bot) handleMessage(message *tgbotapi.Message) {
 		return
 	}
 
-	// Default response for non-commands
+	// For group chats, ignore non-command messages
+	if message.Chat.Type == "group" || message.Chat.Type == "supergroup" {
+		return
+	}
+
+	// For private chats, send help prompt
 	msg := tgbotapi.NewMessage(message.Chat.ID, "Hello! Send /help to see available commands.")
 	if _, err := b.api.Send(msg); err != nil {
 		logger.Error("BOT", "Failed to send message: %v", err)