diff --git a/build/build.xml b/build/build.xml
index 967c24431..934982707 100644
--- a/build/build.xml
+++ b/build/build.xml
@@ -383,13 +383,13 @@
     </antcall>
 
     <antcall target="unzip">
-      <param name="archive_file" value="${staging_folder}/esptool-0.4.2-osx.zip" />
-      <param name="archive_url" value="https://github.com/igrr/esptool-ck/releases/download/0.4.2/esptool-0.4.2-osx.zip" />
-      <param name="final_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/esptool-0.4.2-osx" />
+      <param name="archive_file" value="${staging_folder}/esptool-0.4.3-osx.zip" />
+      <param name="archive_url" value="https://github.com/igrr/esptool-ck/releases/download/0.4.3/esptool-0.4.3-osx.zip" />
+      <param name="final_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/esptool-0.4.3-osx" />
       <param name="dest_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/" />
     </antcall>
-    <move file="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/esptool-0.4.2-osx/esptool" tofile="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/esptool" />
-    <delete dir="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/esptool-0.4.2-osx/" />
+    <move file="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/esptool-0.4.3-osx/esptool" tofile="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/esptool" />
+    <delete dir="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/esptool-0.4.3-osx/" />
 
   </target>
 
@@ -663,13 +663,13 @@
     </antcall>
 
     <antcall target="unzip">
-      <param name="archive_file" value="${staging_folder}/esptool-0.4.2-linux64.zip" />
-      <param name="archive_url" value="https://github.com/igrr/esptool-ck/releases/download/0.4.2/esptool-0.4.2-linux64.zip" />
-      <param name="final_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/esptool-0.4.2-linux64" />
+      <param name="archive_file" value="${staging_folder}/esptool-0.4.3-linux64.zip" />
+      <param name="archive_url" value="https://github.com/igrr/esptool-ck/releases/download/0.4.3/esptool-0.4.3-linux64.zip" />
+      <param name="final_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/esptool-0.4.3-linux64" />
       <param name="dest_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/" />
     </antcall>
-    <move file="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/esptool-0.4.2-linux64/esptool" tofile="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/esptool" />
-    <delete dir="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/esptool-0.4.2-linux64/" />
+    <move file="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/esptool-0.4.3-linux64/esptool" tofile="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/esptool" />
+    <delete dir="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/esptool-0.4.3-linux64/" />
 
   </target>
 
@@ -898,13 +898,13 @@
 	
 
     <antcall target="unzip">
-      <param name="archive_file" value="${staging_folder}/esptool-0.4.2-win32.zip" />
-      <param name="archive_url" value="https://github.com/igrr/esptool-ck/releases/download/0.4.2/esptool-0.4.2-win32.zip" />
-      <param name="final_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/esptool-0.4.2-win32" />
+      <param name="archive_file" value="${staging_folder}/esptool-0.4.3-win32.zip" />
+      <param name="archive_url" value="https://github.com/igrr/esptool-ck/releases/download/0.4.3/esptool-0.4.3-win32.zip" />
+      <param name="final_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/esptool-0.4.3-win32" />
       <param name="dest_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/" />
     </antcall>
-    <move file="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/esptool-0.4.2-win32/esptool.exe" tofile="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/esptool.exe" />
-    <delete dir="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/esptool-0.4.2-win32/" />
+    <move file="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/esptool-0.4.3-win32/esptool.exe" tofile="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/esptool.exe" />
+    <delete dir="${staging_folder}/work/${staging_hardware_folder}/tools/esp8266/esptool-0.4.3-win32/" />
  
   </target>
 
diff --git a/build/esptool-0.0.3.tgz.sha b/build/esptool-0.0.3.tgz.sha
deleted file mode 100644
index c70597ef0..000000000
--- a/build/esptool-0.0.3.tgz.sha
+++ /dev/null
@@ -1 +0,0 @@
-e8c6df47299348a0233e18647e2ed93c8afe65c2
diff --git a/build/linux/esptool-0.4.2-linux64.zip.sha b/build/linux/esptool-0.4.2-linux64.zip.sha
deleted file mode 100644
index 49fb5a4eb..000000000
--- a/build/linux/esptool-0.4.2-linux64.zip.sha
+++ /dev/null
@@ -1 +0,0 @@
-b89b50beb56f0f355d8d14104fb01d523140fe91
diff --git a/build/linux/esptool-0.4.3-linux64.zip.sha b/build/linux/esptool-0.4.3-linux64.zip.sha
new file mode 100644
index 000000000..cafdd1a92
--- /dev/null
+++ b/build/linux/esptool-0.4.3-linux64.zip.sha
@@ -0,0 +1 @@
+f183d52557a50dd362fcb4d45ffd6612b328e465
diff --git a/build/macosx/esptool-0.4.2-osx.zip.sha b/build/macosx/esptool-0.4.2-osx.zip.sha
deleted file mode 100644
index 2dc16d4bb..000000000
--- a/build/macosx/esptool-0.4.2-osx.zip.sha
+++ /dev/null
@@ -1 +0,0 @@
-0bc15099eb589dddff3c43f3e8107728a75fcdfb
diff --git a/build/macosx/esptool-0.4.3-osx.zip.sha b/build/macosx/esptool-0.4.3-osx.zip.sha
new file mode 100644
index 000000000..e53e8f92d
--- /dev/null
+++ b/build/macosx/esptool-0.4.3-osx.zip.sha
@@ -0,0 +1 @@
+544070e40abd3a81cad554020be86157674f9794
diff --git a/build/windows/esptool-0.4.2-win32.zip.sha b/build/windows/esptool-0.4.2-win32.zip.sha
deleted file mode 100644
index 02306041f..000000000
--- a/build/windows/esptool-0.4.2-win32.zip.sha
+++ /dev/null
@@ -1 +0,0 @@
-3031f2d590544403f5c1a90dcc7f549b9144b309
diff --git a/build/windows/esptool-0.4.3-win32.zip.sha b/build/windows/esptool-0.4.3-win32.zip.sha
new file mode 100644
index 000000000..7fc401038
--- /dev/null
+++ b/build/windows/esptool-0.4.3-win32.zip.sha
@@ -0,0 +1 @@
+10eb2292bb20accceb7389ab91fa40afd5b1fb70