diff --git a/tools/download-chromium.sh b/tools/download-chromium.sh
index 660ea1b8..2b81dd80 100644
--- a/tools/download-chromium.sh
+++ b/tools/download-chromium.sh
@@ -28,7 +28,7 @@ while [ $# -gt 0 ]; do
       export HTTPS_PROXY="$2"
       NO_PROXY="127.0.0.0/8,10.0.0.0/8,100.64.0.0/10,172.16.0.0/12,192.168.0.0/16"
       NO_PROXY="${NO_PROXY},::1/128,fe80::/10,fd00::/8,ff00::/8"
-      export NO_PROXY="${NO_PROXY},localhost"
+      export NO_PROXY="${NO_PROXY},localhost,.npmmirror.com"
     ;;
   --mirror)
     WITH_MIRROR="$2"
diff --git a/tools/download-firefox.sh b/tools/download-firefox.sh
index dcc87dc1..e522078f 100644
--- a/tools/download-firefox.sh
+++ b/tools/download-firefox.sh
@@ -17,7 +17,7 @@ while [ $# -gt 0 ]; do
       export HTTPS_PROXY="$2"
       NO_PROXY="127.0.0.0/8,10.0.0.0/8,100.64.0.0/10,172.16.0.0/12,192.168.0.0/16"
       NO_PROXY="${NO_PROXY},::1/128,fe80::/10,fd00::/8,ff00::/8"
-      export NO_PROXY="${NO_PROXY},localhost"
+      export NO_PROXY="${NO_PROXY},localhost,.npmmirror.com"
     ;;
   *)
     ;;
diff --git a/tools/update-library.sh b/tools/update-library.sh
index 17c3927a..31929a49 100644
--- a/tools/update-library.sh
+++ b/tools/update-library.sh
@@ -27,7 +27,7 @@ while [ $# -gt 0 ]; do
     export HTTPS_PROXY="$2"
     NO_PROXY="127.0.0.0/8,10.0.0.0/8,100.64.0.0/10,172.16.0.0/12,192.168.0.0/16"
     NO_PROXY="${NO_PROXY},::1/128,fe80::/10,fd00::/8,ff00::/8"
-    export NO_PROXY="${NO_PROXY},localhost"
+    export NO_PROXY="${NO_PROXY},localhost,.npmmirror.com"
     ;;
   *) ;;