diff --git a/package/package_esp8266com_index.template.json b/package/package_esp8266com_index.template.json
index b90a555cd..f7a6ca38a 100644
--- a/package/package_esp8266com_index.template.json
+++ b/package/package_esp8266com_index.template.json
@@ -82,7 +82,7 @@
             {
               "packager": "esp8266",
               "name": "esptool",
-              "version": "0.4.9"
+              "version": "0.4.12"
             },
             {
               "packager": "esp8266",
@@ -100,49 +100,49 @@
       "tools": [
         {
           "name": "esptool",
-          "version": "0.4.9",
+          "version": "0.4.12",
           "systems": [
             {
               "host": "i686-mingw32",
-              "url": "https://github.com/igrr/esptool-ck/releases/download/0.4.9/esptool-0.4.9-win32.zip",
-              "archiveFileName": "esptool-0.4.9-win32.zip",
-              "checksum": "SHA-256:9c4162cedf05fcb09fd829bfb90e34ae12458365980d79525a072ff5ca44751c",
-              "size": "32436"
+              "url": "https://github.com/igrr/esptool-ck/releases/download/0.4.12/esptool-0.4.12-win32.zip",
+              "archiveFileName": "esptool-0.4.12-win32.zip",
+              "checksum": "SHA-256:f47b3bcf7c29c7a184859bbea68c9d468cf3346ca41e202ed60a0a49d987f223",
+              "size": "16537"
             },
             {
               "host": "x86_64-apple-darwin",
-              "url": "https://github.com/igrr/esptool-ck/releases/download/0.4.9/esptool-0.4.9-osx.tar.gz",
-              "archiveFileName": "esptool-0.4.9-osx.tar.gz",
-              "checksum": "SHA-256:57938b473765723a7e6602d55973017b7719bda69bdcff4250b24fcbf7a399f5",
-              "size": "29310"
+              "url": "https://github.com/igrr/esptool-ck/releases/download/0.4.12/esptool-0.4.12-osx.tar.gz",
+              "archiveFileName": "esptool-0.4.12-osx.tar.gz",
+              "checksum": "SHA-256:8232a70611768dca49321f488e3ada29648e28aa83a6d826fcbb871aed4a9c08",
+              "size": "31981"
             },
             {
               "host": "i386-apple-darwin",
-              "url": "https://github.com/igrr/esptool-ck/releases/download/0.4.9/esptool-0.4.9-osx.tar.gz",
-              "archiveFileName": "esptool-0.4.9-osx.tar.gz",
-              "checksum": "SHA-256:57938b473765723a7e6602d55973017b7719bda69bdcff4250b24fcbf7a399f5",
-              "size": "29310"
+              "url": "https://github.com/igrr/esptool-ck/releases/download/0.4.12/esptool-0.4.12-osx.tar.gz",
+              "archiveFileName": "esptool-0.4.12-osx.tar.gz",
+              "checksum": "SHA-256:8232a70611768dca49321f488e3ada29648e28aa83a6d826fcbb871aed4a9c08",
+              "size": "31981"
             },
             {
               "host": "x86_64-pc-linux-gnu",
-              "url": "https://github.com/igrr/esptool-ck/releases/download/0.4.9/esptool-0.4.9-linux64.tar.gz",
-              "archiveFileName": "esptool-0.4.9-linux64.tar.gz",
-              "checksum": "SHA-256:fab9d1be8a648bea6728ad5c9d18ce972508187700cf90baf1897ac9cdf4db15",
-              "size": "15564"
+              "url": "https://github.com/igrr/esptool-ck/releases/download/0.4.12/esptool-0.4.12-linux64.tar.gz",
+              "archiveFileName": "esptool-0.4.12-linux64.tar.gz",
+              "checksum": "SHA-256:f7ca7666557139bda7b2130022623a004a30d20ea47e1612b9b365783f00d8cb",
+              "size": "15542"
             },
             {
               "host": "i686-pc-linux-gnu",
-              "url": "https://github.com/igrr/esptool-ck/releases/download/0.4.9/esptool-0.4.9-linux32.tar.gz",
-              "archiveFileName": "esptool-0.4.9-linux32.tar.gz",
-              "checksum": "SHA-256:bc4444d73d59be74608be5e1431353a0a9ae9e308e99c76a271d68a6ae145b7b",
-              "size": "15984"
+              "url": "https://github.com/igrr/esptool-ck/releases/download/0.4.12/esptool-0.4.12-linux32.tar.gz",
+              "archiveFileName": "esptool-0.4.12-linux32.tar.gz",
+              "checksum": "SHA-256:2d9970c8574908c35656e35f433082aeb7d79c1967067d7d2cff83f5ed2acbaa",
+              "size": "14668"
             },
             {
               "host": "arm-linux-gnueabihf",
-              "url": "https://github.com/igrr/esptool-ck/releases/download/0.4.9/esptool-0.4.9-linux-armhf.tar.gz",
-              "archiveFileName": "esptool-0.4.9-linux-armhf.tar.gz",
-              "checksum": "SHA-256:d0364492599d90b8305125f8212de5be05397e4efde2fc7d0ed3676bb7018164",
-              "size": "13763"
+              "url": "https://github.com/igrr/esptool-ck/releases/download/0.4.12/esptool-0.4.12-linux-armhf.tar.gz",
+              "archiveFileName": "esptool-0.4.12-linux-armhf.tar.gz",
+              "checksum": "SHA-256:2ab4784c10020cdfc467175fe8885db702e7dd95fa5bdc428ec549257eae1a0e",
+              "size": "13097"
             }
           ]
         },