diff --git a/.github/scripts/on-push.sh b/.github/scripts/on-push.sh
index a1d681e97ec2346b2ad5fdf4d0b1a7eb6ebd266a..a86758e1f418ec83553761dc068aa6eb96213966 100755
--- a/.github/scripts/on-push.sh
+++ b/.github/scripts/on-push.sh
@@ -108,7 +108,7 @@ else
     replace_script+="data['packages']['toolchain-xtensa-esp32']['optional']=True;"
     replace_script+="data['packages']['toolchain-xtensa-esp32s3']['optional']=False;"
     replace_script+="data['packages']['tool-esptoolpy']['owner']='tasmota';"
-    replace_script+="data['packages']['tool-esptoolpy']['version']='https://github.com/tasmota/esptool/releases/download/v3.3/esptool-3.3.zip';"
+    replace_script+="data['packages']['tool-esptoolpy']['version']='https://github.com/tasmota/esptool/releases/download/v4.2.1/esptool-4.2.1.zip';"
     replace_script+="fp.seek(0);fp.truncate();json.dump(data, fp, indent=2);fp.close()"
     python -c "$replace_script"
 
diff --git a/package/package_esp32_index.template.json b/package/package_esp32_index.template.json
index 3c035f97ce89cd80db485d97ce6a74de8198d8bd..497b26ccf0db35d2d30f767b5d5b05f96a4f06b1 100644
--- a/package/package_esp32_index.template.json
+++ b/package/package_esp32_index.template.json
@@ -59,7 +59,7 @@
             {
               "packager": "esp32",
               "name": "esptool_py",
-              "version": "3.3.0"
+              "version": "4.2.1"
             },
             {
               "packager": "esp32",
@@ -297,56 +297,56 @@
         },
         {
           "name": "esptool_py",
-          "version": "3.3.0",
+          "version": "4.2.1",
           "systems": [
             {
               "host": "i686-mingw32",
-              "url": "https://github.com/espressif/arduino-esp32/releases/download/2.0.2/esptool-3.3-windows.zip",
-              "archiveFileName": "esptool-3.3-windows.zip",
-              "checksum": "SHA-256:55a1d7165414bf4dbd2bb16ca094e555d671958450f5d1536b457a518d2b15df",
-              "size": "7436864"
+              "url": "https://github.com/espressif/arduino-esp32/releases/download/2.0.4/esptool-4.2.1-windows.zip",
+              "archiveFileName": "esptool-4.2.1-windows.zip",
+              "checksum": "SHA-256:582560067bfbd9895f4862eb5fdf87558ddee5d4d30e7575c9b8bcb0dd60fd94",
+              "size": "6368279"
             },
             {
               "host": "x86_64-mingw32",
-              "url": "https://github.com/espressif/arduino-esp32/releases/download/2.0.2/esptool-3.3-windows.zip",
-              "archiveFileName": "esptool-3.3-windows.zip",
-              "checksum": "SHA-256:55a1d7165414bf4dbd2bb16ca094e555d671958450f5d1536b457a518d2b15df",
-              "size": "7436864"
+              "url": "https://github.com/espressif/arduino-esp32/releases/download/2.0.4/esptool-4.2.1-windows.zip",
+              "archiveFileName": "esptool-4.2.1-windows.zip",
+              "checksum": "SHA-256:582560067bfbd9895f4862eb5fdf87558ddee5d4d30e7575c9b8bcb0dd60fd94",
+              "size": "6368279"
             },
             {
               "host": "x86_64-apple-darwin",
-              "url": "https://github.com/espressif/arduino-esp32/releases/download/2.0.2/esptool-3.3-macos.tar.gz",
-              "archiveFileName": "esptool-3.3-macos.tar.gz",
-              "checksum": "SHA-256:3e5f7b521ae33c8c63f3b48efc909c08f37bef1a083c0eafa408312c09900afd",
-              "size": "6944975"
+              "url": "https://github.com/espressif/arduino-esp32/releases/download/2.0.4/esptool-4.2.1-macos.tar.gz",
+              "archiveFileName": "esptool-4.2.1-macos.tar.gz",
+              "checksum": "SHA-256:a984f7ad8bdb40c42d0d368bf4bb21b69a9587aed46b7b6d7de23ca58a3f150d",
+              "size": "5816598"
             },
             {
               "host": "x86_64-pc-linux-gnu",
-              "url": "https://github.com/espressif/arduino-esp32/releases/download/2.0.2/esptool-3.3-linux.tar.gz",
-              "archiveFileName": "esptool-3.3-linux.tar.gz",
-              "checksum": "SHA-256:fbe91a49e5f5deca4881f5eed32e8903faf97bfd365fe2d0d1512b80bdb67f5e",
-              "size": "97026"
+              "url": "https://github.com/espressif/arduino-esp32/releases/download/2.0.4/esptool-4.2.1-linux.tar.gz",
+              "archiveFileName": "esptool-4.2.1-linux.tar.gz",
+              "checksum": "SHA-256:5a45fb77eb6574554ec2f45230d0b350f26f9c24ab3b6c13c4031ebdf72a34ab",
+              "size": "90123"
             },
             {
               "host": "i686-pc-linux-gnu",
-              "url": "https://github.com/espressif/arduino-esp32/releases/download/2.0.2/esptool-3.3-linux.tar.gz",
-              "archiveFileName": "esptool-3.3-linux.tar.gz",
-              "checksum": "SHA-256:fbe91a49e5f5deca4881f5eed32e8903faf97bfd365fe2d0d1512b80bdb67f5e",
-              "size": "97026"
+              "url": "https://github.com/espressif/arduino-esp32/releases/download/2.0.4/esptool-4.2.1-linux.tar.gz",
+              "archiveFileName": "esptool-4.2.1-linux.tar.gz",
+              "checksum": "SHA-256:5a45fb77eb6574554ec2f45230d0b350f26f9c24ab3b6c13c4031ebdf72a34ab",
+              "size": "90123"
             },
             {
               "host": "arm-linux-gnueabihf",
-              "url": "https://github.com/espressif/arduino-esp32/releases/download/2.0.2/esptool-3.3-linux.tar.gz",
-              "archiveFileName": "esptool-3.3-linux.tar.gz",
-              "checksum": "SHA-256:fbe91a49e5f5deca4881f5eed32e8903faf97bfd365fe2d0d1512b80bdb67f5e",
-              "size": "97026"
+              "url": "https://github.com/espressif/arduino-esp32/releases/download/2.0.4/esptool-4.2.1-linux.tar.gz",
+              "archiveFileName": "esptool-4.2.1-linux.tar.gz",
+              "checksum": "SHA-256:5a45fb77eb6574554ec2f45230d0b350f26f9c24ab3b6c13c4031ebdf72a34ab",
+              "size": "90123"
             },
             {
               "host": "aarch64-linux-gnu",
-              "url": "https://github.com/espressif/arduino-esp32/releases/download/2.0.2/esptool-3.3-linux.tar.gz",
-              "archiveFileName": "esptool-3.3-linux.tar.gz",
-              "checksum": "SHA-256:fbe91a49e5f5deca4881f5eed32e8903faf97bfd365fe2d0d1512b80bdb67f5e",
-              "size": "97026"
+              "url": "https://github.com/espressif/arduino-esp32/releases/download/2.0.4/esptool-3.3-linux.tar.gz",
+              "archiveFileName": "esptool-4.2.1-linux.tar.gz",
+              "checksum": "SHA-256:5a45fb77eb6574554ec2f45230d0b350f26f9c24ab3b6c13c4031ebdf72a34ab",
+              "size": "90123"
             }
           ]
         },