diff --git a/01_download_factorytest.sh b/01_download_factorytest.sh
index 3257668..367061c 100755
--- a/01_download_factorytest.sh
+++ b/01_download_factorytest.sh
@@ -1,5 +1,8 @@
 #!/bin/bash
 
+# lib.sh を読み込んで curl オプション設定を利用
+source lib.sh
+
 bindir=FactoryTest/build/esp32.esp32.m5stack_stickc_plus2
 mkdir -p "$bindir"
 baseurl="https://cit.istlab.info/f/plus2/FactoryTest.ino."
@@ -8,7 +11,7 @@
 for ext in bin bootloader.bin partitions.bin; do
     url="${baseurl}${ext}"
     echo "Downloading $url ..."
-    curl --ssl-no-revoke -L -o "$bindir/FactoryTest.ino.${ext}" "$url"
+    curl $(lib_get_curl_options) -L -o "$bindir/FactoryTest.ino.${ext}" "$url"
     if [ $? -ne 0 ]; then
         echo "Failed to download $url"
         exit 1
diff --git a/34_write_byhash.sh b/34_write_byhash.sh
index 3ec995e..3ab0db7 100755
--- a/34_write_byhash.sh
+++ b/34_write_byhash.sh
@@ -1,5 +1,8 @@
 #!/bin/bash
 
+# lib.sh を読み込んで curl オプション設定を利用
+source lib.sh
+
 if [ -z "$1" ]; then
     echo "Usage: $0 <hash>"
     
@@ -15,14 +18,14 @@
 # ダウンロードURL
 URL="https://lattr.istlab.info/inobin/dl/${hash}"
  
-RESPONCE_CODE=$(curl -s -o byhash.bin -w "%{http_code}" $URL)
+RESPONCE_CODE=$(curl $(lib_get_curl_options) -s -o byhash.bin -w "%{http_code}" $URL)
 if [ $RESPONCE_CODE -ne 200 ]; then
     echo "Error: $RESPONCE_CODE"
     exit 1
 fi
  
-curl -o byhash.partitions.bin -s ${URL}/partitions
-curl -o byhash.bootloader.bin -s ${URL}/bootloader
+curl $(lib_get_curl_options) -o byhash.partitions.bin -s ${URL}/partitions
+curl $(lib_get_curl_options) -o byhash.bootloader.bin -s ${URL}/bootloader
 echo "Downloaded ${hash} as [byhash.bin], [byhash.partitions.bin], [byhash.bootloader.bin]"
  
 # もし、hashがp1ではじまっていたら、注意喚起する
diff --git a/44_write_latest.sh b/44_write_latest.sh
index daf42c8..aa5e810 100755
--- a/44_write_latest.sh
+++ b/44_write_latest.sh
@@ -51,7 +51,7 @@
 
 
 # echo connecting to ${URL}
-info=`curl -s -o /dev/null -X POST -d "uid=${MYUID}&login=${LOGIN}" ${URL_SHOW}`
+info=`curl $(lib_get_curl_options) -s -o /dev/null -X POST -d "uid=${MYUID}&login=${LOGIN}" ${URL_SHOW}`
 echo "------------------------------"
 echo ${info}
 # もし、infoにhash:p1 が含まれていたら、注意喚起する
@@ -64,7 +64,7 @@
 echo "------------------------------"
 
 # POSTリクエストを送信し、レスポンスコードを取得
-RESPONSE_CODE=$(curl -o latest.bin -s -w "%{http_code}" -X POST -d "uid=${MYUID}&login=${LOGIN}" ${URL})
+RESPONSE_CODE=$(curl $(lib_get_curl_options) -o latest.bin -s -w "%{http_code}" -X POST -d "uid=${MYUID}&login=${LOGIN}" ${URL})
 
 if [ "$RESPONSE_CODE" -ne 200 ]; then
   echo "エラー: レスポンスコード $RESPONSE_CODE が返されました。"
@@ -79,7 +79,7 @@
   if [ "$1" == "y" ]; then
     while true ; do
       sleep 5
-      RESPONSE_CODE=$(curl -o latest.bin -s -w "%{http_code}" -X POST -d "uid=${MYUID}&login=${LOGIN}" ${URL})
+      RESPONSE_CODE=$(curl $(lib_get_curl_options) -o latest.bin -s -w "%{http_code}" -X POST -d "uid=${MYUID}&login=${LOGIN}" ${URL})
       if [ "$RESPONSE_CODE" -eq 200 ]; then
         break
       fi
@@ -89,8 +89,8 @@
 fi
 if [ "$RESPONSE_CODE" -eq 200 ]; then
   echo "ダウンロード成功: (レスポンスコード $RESPONSE_CODE)"
-  curl -o latest.partitions.bin -s -X POST -d "uid=${MYUID}&login=${LOGIN}&type=partitions" ${URL}
-  curl -o latest.bootloader.bin -s -X POST -d "uid=${MYUID}&login=${LOGIN}&type=bootloader" ${URL}
+  curl $(lib_get_curl_options) -o latest.partitions.bin -s -X POST -d "uid=${MYUID}&login=${LOGIN}&type=partitions" ${URL}
+  curl $(lib_get_curl_options) -o latest.bootloader.bin -s -X POST -d "uid=${MYUID}&login=${LOGIN}&type=bootloader" ${URL}
   # 書き込みを行う
   if [ "$1" == "y" ]; then
     yn='y'
diff --git a/91_install_cli.sh b/91_install_cli.sh
index 2b84553..2438cda 100755
--- a/91_install_cli.sh
+++ b/91_install_cli.sh
@@ -1,5 +1,8 @@
 #!/bin/bash
 
+# lib.sh を読み込んで curl オプション設定を利用
+source lib.sh
+
 cd 
 
 # git update-git-for-windows
@@ -9,7 +12,7 @@
   sleep 1
 else 
 # install (or upgrade) arduino-cli 
-  curl -fsSL https://raw.githubusercontent.com/arduino/arduino-cli/master/install.sh | sh
+  curl $(lib_get_curl_options) -fsSL https://raw.githubusercontent.com/arduino/arduino-cli/master/install.sh | sh
 fi
 
 if type -p arduino-cli >/dev/null; then
diff --git a/__admin/plus1_download.sh b/__admin/plus1_download.sh
index 82724f1..d92e739 100755
--- a/__admin/plus1_download.sh
+++ b/__admin/plus1_download.sh
@@ -1,6 +1,10 @@
 #!/bin/bash
 
 cd ..
+
+# lib.sh を読み込んで curl オプション設定を利用
+source lib.sh
+
 bindir=FactoryTest/build/esp32.esp32.m5stack_stickc_plus
 mkdir -p "$bindir"
 baseurl="https://cit.istlab.info/f/plus1/FactoryTest.ino."
@@ -9,7 +13,7 @@
 for ext in bin bootloader.bin partitions.bin; do
     url="${baseurl}${ext}"
     echo "Downloading $url ..."
-    curl -L -o "$bindir/FactoryTest.ino.${ext}" "$url"
+    curl $(lib_get_curl_options) -L -o "$bindir/FactoryTest.ino.${ext}" "$url"
     if [ $? -ne 0 ]; then
         echo "Failed to download $url"
         exit 1
diff --git a/lib.sh b/lib.sh
index ddd243f..127101a 100644
--- a/lib.sh
+++ b/lib.sh
@@ -1,5 +1,18 @@
 #!/usr/bin/env bash
 
+# curl オプション設定
+# true に設定すると --ssl-no-revoke オプションが追加されます
+CURL_SSL_NO_REVOKE=true
+
+# curl の共通オプションを取得する関数
+lib_get_curl_options() {
+    local options=""
+    if [ "$CURL_SSL_NO_REVOKE" = "true" ]; then
+        options="--ssl-no-revoke"
+    fi
+    echo "$options"
+}
+
 # 
 lib_get_esptool_command() {
     PYTHON="python"
diff --git a/m5latest.sh b/m5latest.sh
index daf42c8..aa5e810 100755
--- a/m5latest.sh
+++ b/m5latest.sh
@@ -51,7 +51,7 @@
 
 
 # echo connecting to ${URL}
-info=`curl -s -o /dev/null -X POST -d "uid=${MYUID}&login=${LOGIN}" ${URL_SHOW}`
+info=`curl $(lib_get_curl_options) -s -o /dev/null -X POST -d "uid=${MYUID}&login=${LOGIN}" ${URL_SHOW}`
 echo "------------------------------"
 echo ${info}
 # もし、infoにhash:p1 が含まれていたら、注意喚起する
@@ -64,7 +64,7 @@
 echo "------------------------------"
 
 # POSTリクエストを送信し、レスポンスコードを取得
-RESPONSE_CODE=$(curl -o latest.bin -s -w "%{http_code}" -X POST -d "uid=${MYUID}&login=${LOGIN}" ${URL})
+RESPONSE_CODE=$(curl $(lib_get_curl_options) -o latest.bin -s -w "%{http_code}" -X POST -d "uid=${MYUID}&login=${LOGIN}" ${URL})
 
 if [ "$RESPONSE_CODE" -ne 200 ]; then
   echo "エラー: レスポンスコード $RESPONSE_CODE が返されました。"
@@ -79,7 +79,7 @@
   if [ "$1" == "y" ]; then
     while true ; do
       sleep 5
-      RESPONSE_CODE=$(curl -o latest.bin -s -w "%{http_code}" -X POST -d "uid=${MYUID}&login=${LOGIN}" ${URL})
+      RESPONSE_CODE=$(curl $(lib_get_curl_options) -o latest.bin -s -w "%{http_code}" -X POST -d "uid=${MYUID}&login=${LOGIN}" ${URL})
       if [ "$RESPONSE_CODE" -eq 200 ]; then
         break
       fi
@@ -89,8 +89,8 @@
 fi
 if [ "$RESPONSE_CODE" -eq 200 ]; then
   echo "ダウンロード成功: (レスポンスコード $RESPONSE_CODE)"
-  curl -o latest.partitions.bin -s -X POST -d "uid=${MYUID}&login=${LOGIN}&type=partitions" ${URL}
-  curl -o latest.bootloader.bin -s -X POST -d "uid=${MYUID}&login=${LOGIN}&type=bootloader" ${URL}
+  curl $(lib_get_curl_options) -o latest.partitions.bin -s -X POST -d "uid=${MYUID}&login=${LOGIN}&type=partitions" ${URL}
+  curl $(lib_get_curl_options) -o latest.bootloader.bin -s -X POST -d "uid=${MYUID}&login=${LOGIN}&type=bootloader" ${URL}
   # 書き込みを行う
   if [ "$1" == "y" ]; then
     yn='y'
diff --git a/upload_by_hash.sh b/upload_by_hash.sh
index 99d1a78..5d1a31d 100755
--- a/upload_by_hash.sh
+++ b/upload_by_hash.sh
@@ -17,14 +17,14 @@
 # ダウンロードURL
 URL="https://lattr.istlab.info/inobin/dl/${hash}"
 
-RESPONCE_CODE=$(curl -s -o byhash.bin -w "%{http_code}" $URL)
+RESPONCE_CODE=$(curl $(lib_get_curl_options) -s -o byhash.bin -w "%{http_code}" $URL)
 if [ $RESPONCE_CODE -ne 200 ]; then
     echo "Error: $RESPONCE_CODE"
     exit 1
 fi
 
-curl -o byhash.partitions.bin -s ${URL}/partitions
-curl -o byhash.bootloader.bin -s ${URL}/bootloader
+curl $(lib_get_curl_options) -o byhash.partitions.bin -s ${URL}/partitions
+curl $(lib_get_curl_options) -o byhash.bootloader.bin -s ${URL}/bootloader
 echo "Downloaded ${hash} as [byhash.bin], [byhash.partitions.bin], [byhash.bootloader.bin]"
 
 # もし、hashがp1ではじまっていたら、注意喚起する