diff --git a/install.sh b/install.sh
index 11b9a199..036321a8 100644
--- a/install.sh
+++ b/install.sh
@@ -90,6 +90,12 @@ build_sing_box() {
     VERSION=$(git rev-parse --short HEAD 2>/dev/null || echo "custom")
     # Reduced tags for safer build on smaller servers
     TAGS="with_quic,with_utls,with_clash_api,with_gvisor,with_acme"
+
+    echo -e "${YELLOW}Downloading Go modules and refreshing go.sum entries...${NC}"
+    if ! go mod download; then
+        echo -e "${RED}Failed to download Go modules.${NC}"
+        exit 1
+    fi
     
     echo -e "${YELLOW}Starting compilation (this may take a few minutes)...${NC}"
     echo -e "${YELLOW}Note: Using -p 1 to save memory and avoid silent crashes.${NC}"