diff --git a/build/arduino-builder-linux32-1.5.1.tar.bz2.sha b/build/arduino-builder-linux32-1.5.1.tar.bz2.sha
deleted file mode 100644
index 60a81849f..000000000
--- a/build/arduino-builder-linux32-1.5.1.tar.bz2.sha
+++ /dev/null
@@ -1 +0,0 @@
-cb8bad95ecfeaa76bd7760fd606a454108dbf928
diff --git a/build/arduino-builder-linux32-1.5.2.tar.bz2.sha b/build/arduino-builder-linux32-1.5.2.tar.bz2.sha
new file mode 100644
index 000000000..66a8ff5f4
--- /dev/null
+++ b/build/arduino-builder-linux32-1.5.2.tar.bz2.sha
@@ -0,0 +1 @@
+3c59ce3e4d4972d505e29d96f9c002c6a57bcdfe
diff --git a/build/arduino-builder-linux64-1.5.1.tar.bz2.sha b/build/arduino-builder-linux64-1.5.1.tar.bz2.sha
deleted file mode 100644
index ea0cb42c1..000000000
--- a/build/arduino-builder-linux64-1.5.1.tar.bz2.sha
+++ /dev/null
@@ -1 +0,0 @@
-22781412faecc3d889e0dca0b6375dd331911862
diff --git a/build/arduino-builder-linux64-1.5.2.tar.bz2.sha b/build/arduino-builder-linux64-1.5.2.tar.bz2.sha
new file mode 100644
index 000000000..b1a7c45d6
--- /dev/null
+++ b/build/arduino-builder-linux64-1.5.2.tar.bz2.sha
@@ -0,0 +1 @@
+4c15507e0e9707165e81d8c1d74fd437cae4c8f8
diff --git a/build/arduino-builder-linuxaarch64-1.5.1.tar.bz2.sha b/build/arduino-builder-linuxaarch64-1.5.1.tar.bz2.sha
deleted file mode 100644
index ce4a1e087..000000000
--- a/build/arduino-builder-linuxaarch64-1.5.1.tar.bz2.sha
+++ /dev/null
@@ -1 +0,0 @@
-8f92e88e9cc05b2659cb5d87f8ac0c7d1cb789ed
diff --git a/build/arduino-builder-linuxaarch64-1.5.2.tar.bz2.sha b/build/arduino-builder-linuxaarch64-1.5.2.tar.bz2.sha
new file mode 100644
index 000000000..c7db8bec5
--- /dev/null
+++ b/build/arduino-builder-linuxaarch64-1.5.2.tar.bz2.sha
@@ -0,0 +1 @@
+dba114904a611fba09c49705965f3f306f17fb67
diff --git a/build/arduino-builder-linuxarm-1.5.1.tar.bz2.sha b/build/arduino-builder-linuxarm-1.5.1.tar.bz2.sha
deleted file mode 100644
index abab2cd43..000000000
--- a/build/arduino-builder-linuxarm-1.5.1.tar.bz2.sha
+++ /dev/null
@@ -1 +0,0 @@
-ced8570061218c818e7d889ee418a25404879b7c
diff --git a/build/arduino-builder-linuxarm-1.5.2.tar.bz2.sha b/build/arduino-builder-linuxarm-1.5.2.tar.bz2.sha
new file mode 100644
index 000000000..b7cf6d327
--- /dev/null
+++ b/build/arduino-builder-linuxarm-1.5.2.tar.bz2.sha
@@ -0,0 +1 @@
+c665aee103e167f606d750c2c49d9df57a42e9f7
diff --git a/build/arduino-builder-macosx-1.5.1-signed-2.tar.bz2.sha b/build/arduino-builder-macosx-1.5.1-signed-2.tar.bz2.sha
deleted file mode 100644
index 1e1ceca51..000000000
--- a/build/arduino-builder-macosx-1.5.1-signed-2.tar.bz2.sha
+++ /dev/null
@@ -1 +0,0 @@
-e51868105ed1b921d5dde26dedd4c742c1579bbe
diff --git a/build/arduino-builder-macosx-1.5.2-signed.tar.bz2.sha b/build/arduino-builder-macosx-1.5.2-signed.tar.bz2.sha
new file mode 100644
index 000000000..00a842a1a
--- /dev/null
+++ b/build/arduino-builder-macosx-1.5.2-signed.tar.bz2.sha
@@ -0,0 +1 @@
+f6906a2b44216fadf3efa97a5252fcf8d6a9f37e
diff --git a/build/arduino-builder-windows-1.5.1.zip.sha b/build/arduino-builder-windows-1.5.1.zip.sha
deleted file mode 100644
index 5d8d7e86b..000000000
--- a/build/arduino-builder-windows-1.5.1.zip.sha
+++ /dev/null
@@ -1 +0,0 @@
-a235a031bd727e7303496014f3a9dd5edb85c4b2
diff --git a/build/arduino-builder-windows-1.5.2.zip.sha b/build/arduino-builder-windows-1.5.2.zip.sha
new file mode 100644
index 000000000..3d9b9c25b
--- /dev/null
+++ b/build/arduino-builder-windows-1.5.2.zip.sha
@@ -0,0 +1 @@
+70aaca6e113765cecc3256acc147ab750c4b6778
diff --git a/build/build.xml b/build/build.xml
index 1b19d7e2a..6ddec0602 100644
--- a/build/build.xml
+++ b/build/build.xml
@@ -99,7 +99,7 @@
 
   <property name="portable" value="false" />
 
-  <property name="ARDUINO-BUILDER-VERSION" value="1.5.1" />
+  <property name="ARDUINO-BUILDER-VERSION" value="1.5.2" />
   <property name="LIBLISTSERIAL-VERSION" value="1.4.2-2" />
   <property name="AVRGCC-VERSION" value="7.3.0-atmel3.6.1-arduino5" />
   <property name="AVRDUDE-VERSION" value="6.3.0-arduino17" />
@@ -487,7 +487,7 @@
     <copy file="macosx/liblistSerials-${LIBLISTSERIAL-VERSION}/osx/liblistSerialsj.dylib" todir="macosx/work/${staging_hardware_folder}/../lib/" />
     <chmod perm="755" file="macosx/work/${staging_hardware_folder}/../lib/liblistSerialsj.dylib" />
 
-    <property name="ARDUINO-BUILDER-EXTRA-VERSION" value="-signed-2" />
+    <property name="ARDUINO-BUILDER-EXTRA-VERSION" value="-signed" />
     <antcall target="build-arduino-builder" />
 
     <antcall target="portable-${portable}">