diff --git a/build/build.xml b/build/build.xml
index 20bac52d4..5afc34cb6 100644
--- a/build/build.xml
+++ b/build/build.xml
@@ -398,13 +398,13 @@
 
     
     <antcall target="untar">
-      <param name="archive_file" value="${staging_folder}/esptool-0.4.4-osx.tar.gz" />
-      <param name="archive_url" value="https://github.com/igrr/esptool-ck/releases/download/0.4.4/esptool-0.4.4-osx.tar.gz" />
-      <param name="final_folder" value="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/esptool-0.4.4-osx" />
+      <param name="archive_file" value="${staging_folder}/esptool-0.4.5-osx.tar.gz" />
+      <param name="archive_url" value="https://github.com/igrr/esptool-ck/releases/download/0.4.5/esptool-0.4.5-osx.tar.gz" />
+      <param name="final_folder" value="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/esptool-0.4.5-osx" />
       <param name="dest_folder" value="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/" />
     </antcall>
-    <move file="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/esptool-0.4.4-osx/esptool" tofile="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/esptool" />
-    <delete dir="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/esptool-0.4.4-osx/" />
+    <move file="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/esptool-0.4.5-osx/esptool" tofile="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/esptool" />
+    <delete dir="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/esptool-0.4.5-osx/" />
 
   </target>
 
@@ -673,13 +673,13 @@
     </antcall>
 
     <antcall target="untar">
-      <param name="archive_file" value="${staging_folder}/esptool-0.4.4-linux64.tar.gz" />
-      <param name="archive_url" value="https://github.com/igrr/esptool-ck/releases/download/0.4.4/esptool-0.4.4-linux64.tar.gz" />
-      <param name="final_folder" value="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/esptool-0.4.4-linux64" />
+      <param name="archive_file" value="${staging_folder}/esptool-0.4.5-linux64.tar.gz" />
+      <param name="archive_url" value="https://github.com/igrr/esptool-ck/releases/download/0.4.5/esptool-0.4.5-linux64.tar.gz" />
+      <param name="final_folder" value="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/esptool-0.4.5-linux64" />
       <param name="dest_folder" value="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/" />
     </antcall>
-    <move file="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/esptool-0.4.4-linux64/esptool" tofile="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/esptool" />
-    <delete dir="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/esptool-0.4.4-linux64/" />
+    <move file="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/esptool-0.4.5-linux64/esptool" tofile="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/esptool" />
+    <delete dir="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/esptool-0.4.5-linux64/" />
 
   </target>
 
@@ -928,13 +928,13 @@
 	
 
     <antcall target="unzip">
-      <param name="archive_file" value="${staging_folder}/esptool-0.4.4-win32.zip" />
-      <param name="archive_url" value="https://github.com/igrr/esptool-ck/releases/download/0.4.4/esptool-0.4.4-win32.zip" />
-      <param name="final_folder" value="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/esptool-0.4.4-win32" />
+      <param name="archive_file" value="${staging_folder}/esptool-0.4.5-win32.zip" />
+      <param name="archive_url" value="https://github.com/igrr/esptool-ck/releases/download/0.4.5/esptool-0.4.5-win32.zip" />
+      <param name="final_folder" value="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/esptool-0.4.5-win32" />
       <param name="dest_folder" value="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/" />
     </antcall>
-    <move file="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/esptool-0.4.4-win32/esptool.exe" tofile="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/esptool.exe" />
-    <delete dir="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/esptool-0.4.4-win32/" />
+    <move file="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/esptool-0.4.5-win32/esptool.exe" tofile="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/esptool.exe" />
+    <delete dir="${staging_folder}/work/${staging_hardware_folder}/esp8266com/esp8266/tools/esptool-0.4.5-win32/" />
  
   </target>
 
diff --git a/build/linux/esptool-0.4.4-linux64.tar.gz.sha b/build/linux/esptool-0.4.4-linux64.tar.gz.sha
deleted file mode 100644
index 18f5fabdd..000000000
--- a/build/linux/esptool-0.4.4-linux64.tar.gz.sha
+++ /dev/null
@@ -1 +0,0 @@
-65e4b3c4a26e7960536f8f2a19c5d65a13fe8025
diff --git a/build/linux/esptool-0.4.5-linux64.tar.gz.sha b/build/linux/esptool-0.4.5-linux64.tar.gz.sha
new file mode 100644
index 000000000..d380907b5
--- /dev/null
+++ b/build/linux/esptool-0.4.5-linux64.tar.gz.sha
@@ -0,0 +1 @@
+ef9940f7b690f346739b54e4df46d0fbd37f0e12
diff --git a/build/macosx/esptool-0.4.4-osx.tar.gz.sha b/build/macosx/esptool-0.4.4-osx.tar.gz.sha
deleted file mode 100644
index 0cf3a3d4a..000000000
--- a/build/macosx/esptool-0.4.4-osx.tar.gz.sha
+++ /dev/null
@@ -1 +0,0 @@
-26c53e32887b0c41dab861df93a60d1688e7762b
diff --git a/build/macosx/esptool-0.4.5-osx.tar.gz.sha b/build/macosx/esptool-0.4.5-osx.tar.gz.sha
new file mode 100644
index 000000000..534ff18d5
--- /dev/null
+++ b/build/macosx/esptool-0.4.5-osx.tar.gz.sha
@@ -0,0 +1 @@
+702be33406745b31904a40b28cf6ebb87173e4c8
diff --git a/build/windows/esptool-0.4.4-win32.zip.sha b/build/windows/esptool-0.4.4-win32.zip.sha
deleted file mode 100644
index 9fea4d2e5..000000000
--- a/build/windows/esptool-0.4.4-win32.zip.sha
+++ /dev/null
@@ -1 +0,0 @@
-2d1beb3fb3af8b16bca15b7cd6f61aec10cc52cb
diff --git a/build/windows/esptool-0.4.5-win32.zip.sha b/build/windows/esptool-0.4.5-win32.zip.sha
new file mode 100644
index 000000000..e37cc5b2a
--- /dev/null
+++ b/build/windows/esptool-0.4.5-win32.zip.sha
@@ -0,0 +1 @@
+7c6b0049e016889a85dc0c7e01282ef0ce36d1f3