diff --git a/build/arduino-builder-linux32-1.5.5.tar.bz2.sha b/build/arduino-builder-linux32-1.5.5.tar.bz2.sha
deleted file mode 100644
index 39abd188b..000000000
--- a/build/arduino-builder-linux32-1.5.5.tar.bz2.sha
+++ /dev/null
@@ -1 +0,0 @@
-9cb443b7bf67fc6613982f8a13f171b361ca37cb
diff --git a/build/arduino-builder-linux32-1.5.6.tar.bz2.sha b/build/arduino-builder-linux32-1.5.6.tar.bz2.sha
new file mode 100644
index 000000000..042de59e8
--- /dev/null
+++ b/build/arduino-builder-linux32-1.5.6.tar.bz2.sha
@@ -0,0 +1 @@
+ad9b4b4af836c7764cbad920bb0bb87e224a891b
diff --git a/build/arduino-builder-linux64-1.5.5.tar.bz2.sha b/build/arduino-builder-linux64-1.5.5.tar.bz2.sha
deleted file mode 100644
index ef14677ca..000000000
--- a/build/arduino-builder-linux64-1.5.5.tar.bz2.sha
+++ /dev/null
@@ -1 +0,0 @@
-6a651845db81c54d888253e890105fe60cfa0f40
diff --git a/build/arduino-builder-linux64-1.5.6.tar.bz2.sha b/build/arduino-builder-linux64-1.5.6.tar.bz2.sha
new file mode 100644
index 000000000..124d6660b
--- /dev/null
+++ b/build/arduino-builder-linux64-1.5.6.tar.bz2.sha
@@ -0,0 +1 @@
+64571e880e184df609812a3bba503a3e59a80db9
diff --git a/build/arduino-builder-linuxaarch64-1.5.5.tar.bz2.sha b/build/arduino-builder-linuxaarch64-1.5.5.tar.bz2.sha
deleted file mode 100644
index 4582373a6..000000000
--- a/build/arduino-builder-linuxaarch64-1.5.5.tar.bz2.sha
+++ /dev/null
@@ -1 +0,0 @@
-eb03f430901080e1f251d432f1e8615c4229f912
diff --git a/build/arduino-builder-linuxaarch64-1.5.6.tar.bz2.sha b/build/arduino-builder-linuxaarch64-1.5.6.tar.bz2.sha
new file mode 100644
index 000000000..71a4c3ca8
--- /dev/null
+++ b/build/arduino-builder-linuxaarch64-1.5.6.tar.bz2.sha
@@ -0,0 +1 @@
+bbba4a270a0b1007e8efd285316eeb805e9bad6b
diff --git a/build/arduino-builder-linuxarm-1.5.5.tar.bz2.sha b/build/arduino-builder-linuxarm-1.5.5.tar.bz2.sha
deleted file mode 100644
index 25c78429a..000000000
--- a/build/arduino-builder-linuxarm-1.5.5.tar.bz2.sha
+++ /dev/null
@@ -1 +0,0 @@
-d7e76a71f9760514ab72c368452e6c70cc4523f6
diff --git a/build/arduino-builder-linuxarm-1.5.6.tar.bz2.sha b/build/arduino-builder-linuxarm-1.5.6.tar.bz2.sha
new file mode 100644
index 000000000..c9dcdd58f
--- /dev/null
+++ b/build/arduino-builder-linuxarm-1.5.6.tar.bz2.sha
@@ -0,0 +1 @@
+a5a310c8dd893e681c38e81ad13da2e208f12ce2
diff --git a/build/arduino-builder-macosx-1.5.5-signed.tar.bz2.sha b/build/arduino-builder-macosx-1.5.5-signed.tar.bz2.sha
deleted file mode 100644
index 51140b6ff..000000000
--- a/build/arduino-builder-macosx-1.5.5-signed.tar.bz2.sha
+++ /dev/null
@@ -1 +0,0 @@
-4492b894f11cfe855e34e1bd36052abd44fb8554
diff --git a/build/arduino-builder-macosx-1.5.6-signed.tar.bz2.sha b/build/arduino-builder-macosx-1.5.6-signed.tar.bz2.sha
new file mode 100644
index 000000000..3e078ab5b
--- /dev/null
+++ b/build/arduino-builder-macosx-1.5.6-signed.tar.bz2.sha
@@ -0,0 +1 @@
+c2e7d07a670b8c34f46eb02c80f185bece287655
diff --git a/build/arduino-builder-windows-1.5.5.zip.sha b/build/arduino-builder-windows-1.5.5.zip.sha
deleted file mode 100644
index 582164e96..000000000
--- a/build/arduino-builder-windows-1.5.5.zip.sha
+++ /dev/null
@@ -1 +0,0 @@
-e91531a93b209a7664d009e51b6358dbba77d966
diff --git a/build/arduino-builder-windows-1.5.6.zip.sha b/build/arduino-builder-windows-1.5.6.zip.sha
new file mode 100644
index 000000000..5252d6290
--- /dev/null
+++ b/build/arduino-builder-windows-1.5.6.zip.sha
@@ -0,0 +1 @@
+2b56c106c8db40e82ce62213c66615b059fdfb7b
diff --git a/build/build.xml b/build/build.xml
index 9a6ba32b5..55e2ddc8e 100644
--- a/build/build.xml
+++ b/build/build.xml
@@ -99,7 +99,7 @@
 
   <property name="portable" value="false" />
 
-  <property name="ARDUINO-BUILDER-VERSION" value="1.5.5" />
+  <property name="ARDUINO-BUILDER-VERSION" value="1.5.6" />
   <property name="LIBLISTSERIAL-VERSION" value="1.4.2-2" />
   <property name="AVRGCC-VERSION" value="7.3.0-atmel3.6.1-arduino7" />
   <property name="AVRDUDE-VERSION" value="6.3.0-arduino17" />