diff --git a/build/arduino-builder-arm-1.3.19.tar.bz2.sha b/build/arduino-builder-arm-1.3.19.tar.bz2.sha
deleted file mode 100644
index eaa05431a..000000000
--- a/build/arduino-builder-arm-1.3.19.tar.bz2.sha
+++ /dev/null
@@ -1 +0,0 @@
-20520fce81997e40b01d003e4c5c00a0b8036c57
diff --git a/build/arduino-builder-arm-1.3.20.tar.bz2.sha b/build/arduino-builder-arm-1.3.20.tar.bz2.sha
new file mode 100644
index 000000000..b3b57b638
--- /dev/null
+++ b/build/arduino-builder-arm-1.3.20.tar.bz2.sha
@@ -0,0 +1 @@
+54400e4492e999bfd70339c7c42b27a543d45904
diff --git a/build/arduino-builder-linux32-1.3.19.tar.bz2.sha b/build/arduino-builder-linux32-1.3.19.tar.bz2.sha
deleted file mode 100644
index a22d594e6..000000000
--- a/build/arduino-builder-linux32-1.3.19.tar.bz2.sha
+++ /dev/null
@@ -1 +0,0 @@
-c2d8c712d908b370314a98cebe9bbf2ec621f5c6
diff --git a/build/arduino-builder-linux32-1.3.20.tar.bz2.sha b/build/arduino-builder-linux32-1.3.20.tar.bz2.sha
new file mode 100644
index 000000000..ad959aade
--- /dev/null
+++ b/build/arduino-builder-linux32-1.3.20.tar.bz2.sha
@@ -0,0 +1 @@
+76101c44be4e386434b8c48deb72c43f02bc6335
diff --git a/build/arduino-builder-linux64-1.3.19.tar.bz2.sha b/build/arduino-builder-linux64-1.3.19.tar.bz2.sha
deleted file mode 100644
index 24b63fadb..000000000
--- a/build/arduino-builder-linux64-1.3.19.tar.bz2.sha
+++ /dev/null
@@ -1 +0,0 @@
-66bb29b2ddcf1bc3896e2ccfa396353ea6735cc7
diff --git a/build/arduino-builder-linux64-1.3.20.tar.bz2.sha b/build/arduino-builder-linux64-1.3.20.tar.bz2.sha
new file mode 100644
index 000000000..2b759a2a7
--- /dev/null
+++ b/build/arduino-builder-linux64-1.3.20.tar.bz2.sha
@@ -0,0 +1 @@
+199521cf9520abec32f35ef9ae619139203f4720
diff --git a/build/arduino-builder-macosx-1.3.19.tar.bz2.sha b/build/arduino-builder-macosx-1.3.19.tar.bz2.sha
deleted file mode 100644
index 03c5d97c4..000000000
--- a/build/arduino-builder-macosx-1.3.19.tar.bz2.sha
+++ /dev/null
@@ -1 +0,0 @@
-f933da93b97b8981298b2e289d8650536b5978d5
diff --git a/build/arduino-builder-macosx-1.3.20.tar.bz2.sha b/build/arduino-builder-macosx-1.3.20.tar.bz2.sha
new file mode 100644
index 000000000..4de1362a2
--- /dev/null
+++ b/build/arduino-builder-macosx-1.3.20.tar.bz2.sha
@@ -0,0 +1 @@
+18867a5e1a424a0bf95521b234c77a0ab71b5b42
diff --git a/build/arduino-builder-windows-1.3.19.zip.sha b/build/arduino-builder-windows-1.3.19.zip.sha
deleted file mode 100644
index 8c7f4f3b1..000000000
--- a/build/arduino-builder-windows-1.3.19.zip.sha
+++ /dev/null
@@ -1 +0,0 @@
-1cd4a97fba256a4560d4da68cbead738bf4e8312
diff --git a/build/arduino-builder-windows-1.3.20.zip.sha b/build/arduino-builder-windows-1.3.20.zip.sha
new file mode 100644
index 000000000..0fe93839c
--- /dev/null
+++ b/build/arduino-builder-windows-1.3.20.zip.sha
@@ -0,0 +1 @@
+e517de9c173d6fc97d24a7d289dd56c12798c524
diff --git a/build/build.xml b/build/build.xml
index 446dadce2..4723bcda7 100644
--- a/build/build.xml
+++ b/build/build.xml
@@ -89,7 +89,7 @@
 
   <property name="portable" value="false" />
 
-  <property name="ARDUINO-BUILDER-VERSION" value="1.3.19" />
+  <property name="ARDUINO-BUILDER-VERSION" value="1.3.20" />
   <property name="LIBLISTSERIAL-VERSION" value="1.1.4" />
   <property name="AVRGCC-VERSION" value="4.9.2-atmel3.5.3-arduino2" />
   <property name="AVRDUDE-VERSION" value="6.3.0-arduino2" />