diff --git a/build/arduino-builder-linux32-1.4.4.tar.bz2.sha b/build/arduino-builder-linux32-1.4.4.tar.bz2.sha
deleted file mode 100644
index c95c54697..000000000
--- a/build/arduino-builder-linux32-1.4.4.tar.bz2.sha
+++ /dev/null
@@ -1 +0,0 @@
-b921835888c5bf4ad07c10b5e2e19a975528e380
diff --git a/build/arduino-builder-linux32-1.4.5.tar.bz2.sha b/build/arduino-builder-linux32-1.4.5.tar.bz2.sha
new file mode 100644
index 000000000..f3a555135
--- /dev/null
+++ b/build/arduino-builder-linux32-1.4.5.tar.bz2.sha
@@ -0,0 +1 @@
+2a45e470b163c5962aa7aa5531964855ae966f1b
diff --git a/build/arduino-builder-linux64-1.4.4.tar.bz2.sha b/build/arduino-builder-linux64-1.4.4.tar.bz2.sha
deleted file mode 100644
index a8110a412..000000000
--- a/build/arduino-builder-linux64-1.4.4.tar.bz2.sha
+++ /dev/null
@@ -1 +0,0 @@
-d9e5fdd0f73d8f62504abddc071dcb6f660c8b6e
diff --git a/build/arduino-builder-linux64-1.4.5.tar.bz2.sha b/build/arduino-builder-linux64-1.4.5.tar.bz2.sha
new file mode 100644
index 000000000..4c6f083ae
--- /dev/null
+++ b/build/arduino-builder-linux64-1.4.5.tar.bz2.sha
@@ -0,0 +1 @@
+bce6002b0edc86b41f6a3dfc6b9e6a172cdc6b4c
diff --git a/build/arduino-builder-linuxaarch64-1.4.4.tar.bz2.sha b/build/arduino-builder-linuxaarch64-1.4.4.tar.bz2.sha
deleted file mode 100644
index 6ce781c87..000000000
--- a/build/arduino-builder-linuxaarch64-1.4.4.tar.bz2.sha
+++ /dev/null
@@ -1 +0,0 @@
-9ff8b48d3f61e40ecff4bf2e7c14e312302290d7
diff --git a/build/arduino-builder-linuxaarch64-1.4.5.tar.bz2.sha b/build/arduino-builder-linuxaarch64-1.4.5.tar.bz2.sha
new file mode 100644
index 000000000..051dc4f79
--- /dev/null
+++ b/build/arduino-builder-linuxaarch64-1.4.5.tar.bz2.sha
@@ -0,0 +1 @@
+d053ef6ee7b544d31dda243a379053e23a1b287f
diff --git a/build/arduino-builder-linuxarm-1.4.4.tar.bz2.sha b/build/arduino-builder-linuxarm-1.4.4.tar.bz2.sha
deleted file mode 100644
index 9ce328cfa..000000000
--- a/build/arduino-builder-linuxarm-1.4.4.tar.bz2.sha
+++ /dev/null
@@ -1 +0,0 @@
-19beb0ed3f1dea919b33d7defbe1b05414b69f2b
diff --git a/build/arduino-builder-linuxarm-1.4.5.tar.bz2.sha b/build/arduino-builder-linuxarm-1.4.5.tar.bz2.sha
new file mode 100644
index 000000000..ce2c1fee4
--- /dev/null
+++ b/build/arduino-builder-linuxarm-1.4.5.tar.bz2.sha
@@ -0,0 +1 @@
+0164aa7ca0db10c1d2da4094d2036608acaf5895
diff --git a/build/arduino-builder-macosx-1.4.4.tar.bz2.sha b/build/arduino-builder-macosx-1.4.4.tar.bz2.sha
deleted file mode 100644
index 50049c75a..000000000
--- a/build/arduino-builder-macosx-1.4.4.tar.bz2.sha
+++ /dev/null
@@ -1 +0,0 @@
-d7006495131ec609d797c0f049a10fe6156751a3
diff --git a/build/arduino-builder-macosx-1.4.5.tar.bz2.sha b/build/arduino-builder-macosx-1.4.5.tar.bz2.sha
new file mode 100644
index 000000000..5f391a427
--- /dev/null
+++ b/build/arduino-builder-macosx-1.4.5.tar.bz2.sha
@@ -0,0 +1 @@
+991f6f0958d44b183dba1f53ac13a53c8e61cbd1
diff --git a/build/arduino-builder-windows-1.4.4.zip.sha b/build/arduino-builder-windows-1.4.4.zip.sha
deleted file mode 100644
index 532e9b55e..000000000
--- a/build/arduino-builder-windows-1.4.4.zip.sha
+++ /dev/null
@@ -1 +0,0 @@
-7cc958e5e96c26408b7396ecf63688eb25894c2c
diff --git a/build/arduino-builder-windows-1.4.5.zip.sha b/build/arduino-builder-windows-1.4.5.zip.sha
new file mode 100644
index 000000000..8639e1234
--- /dev/null
+++ b/build/arduino-builder-windows-1.4.5.zip.sha
@@ -0,0 +1 @@
+049fc8ecbc4d839252ede8bc92f0cd9468ac4891
diff --git a/build/build.xml b/build/build.xml
index 1e034b112..9f4a44748 100644
--- a/build/build.xml
+++ b/build/build.xml
@@ -99,7 +99,7 @@
 
   <property name="portable" value="false" />
 
-  <property name="ARDUINO-BUILDER-VERSION" value="1.4.4" />
+  <property name="ARDUINO-BUILDER-VERSION" value="1.4.5" />
   <property name="LIBLISTSERIAL-VERSION" value="1.4.2" />
   <property name="AVRGCC-VERSION" value="5.4.0-atmel3.6.1-arduino2" />
   <property name="AVRDUDE-VERSION" value="6.3.0-arduino14" />