diff --git a/Tools/scripts/build_autotest.sh b/Tools/scripts/build_autotest.sh
index c3245d3b52..a96f5cad0e 100755
--- a/Tools/scripts/build_autotest.sh
+++ b/Tools/scripts/build_autotest.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-export PATH=$HOME/.local/bin:/usr/local/bin:$HOME/prefix/bin:$HOME/APM/px4/gcc-arm-none-eabi-4_7-2014q2/bin:$PATH
+export PATH=$HOME/.local/bin:/usr/local/bin:$HOME/prefix/bin:$HOME/APM/px4/gcc-arm-none-eabi-4_9-2015q3/bin:$PATH
 export PYTHONUNBUFFERED=1
 export PYTHONPATH=$HOME/APM
 
diff --git a/Tools/scripts/install-prereqs-arch.sh b/Tools/scripts/install-prereqs-arch.sh
index a709fb242b..02e4bb10e0 100755
--- a/Tools/scripts/install-prereqs-arch.sh
+++ b/Tools/scripts/install-prereqs-arch.sh
@@ -16,7 +16,7 @@ ARCH_AUR_PKGS="genromfs"
 
 # GNU Tools for ARM Embedded Processors
 # (see https://launchpad.net/gcc-arm-embedded/)
-ARM_ROOT="gcc-arm-none-eabi-4_7-2014q2"
+ARM_ROOT="gcc-arm-none-eabi-4_9-2015q3"
 ARM_TARBALL="$ARM_ROOT-20140408-linux.tar.bz2"
 ARM_TARBALL_URL="http://firmware.diydrones.com/Tools/PX4-tools/$ARM_TARBALL"
 
diff --git a/Tools/scripts/install-prereqs-ubuntu.sh b/Tools/scripts/install-prereqs-ubuntu.sh
index 93a89b0c55..05648fe263 100755
--- a/Tools/scripts/install-prereqs-ubuntu.sh
+++ b/Tools/scripts/install-prereqs-ubuntu.sh
@@ -17,7 +17,7 @@ ASSUME_YES=false
 
 # GNU Tools for ARM Embedded Processors
 # (see https://launchpad.net/gcc-arm-embedded/)
-ARM_ROOT="gcc-arm-none-eabi-4_7-2014q2"
+ARM_ROOT="gcc-arm-none-eabi-4_9-2015q3"
 ARM_TARBALL="$ARM_ROOT-20140408-linux.tar.bz2"
 ARM_TARBALL_URL="http://firmware.diydrones.com/Tools/PX4-tools/$ARM_TARBALL"
 
diff --git a/Tools/scripts/install-travis-env.sh b/Tools/scripts/install-travis-env.sh
index 26391f5db7..f4f038c9a4 100755
--- a/Tools/scripts/install-travis-env.sh
+++ b/Tools/scripts/install-travis-env.sh
@@ -19,7 +19,7 @@ UBUNTU64_PKGS="libc6:i386 libgcc1:i386 gcc-4.6-base:i386 libstdc++5:i386 libstdc
 
 # GNU Tools for ARM Embedded Processors
 # (see https://launchpad.net/gcc-arm-embedded/)
-ARM_ROOT="gcc-arm-none-eabi-4_7-2014q2"
+ARM_ROOT="gcc-arm-none-eabi-4_9-2015q3"
 ARM_TARBALL="$ARM_ROOT-20140408-linux.tar.bz2"
 ARM_TARBALL_URL="http://firmware.diydrones.com/Tools/PX4-tools/$ARM_TARBALL"
 
diff --git a/Tools/vagrant/initvagrant.sh b/Tools/vagrant/initvagrant.sh
index a783401dca..de9113eaee 100755
--- a/Tools/vagrant/initvagrant.sh
+++ b/Tools/vagrant/initvagrant.sh
@@ -15,7 +15,7 @@ UBUNTU64_PKGS="libc6:i386 libgcc1:i386 gcc-4.6-base:i386 libstdc++5:i386 libstdc
 
 # GNU Tools for ARM Embedded Processors
 # (see https://launchpad.net/gcc-arm-embedded/)
-ARM_ROOT="gcc-arm-none-eabi-4_7-2014q2"
+ARM_ROOT="gcc-arm-none-eabi-4_9-2015q3"
 ARM_TARBALL="$ARM_ROOT-20140408-linux.tar.bz2"
 ARM_TARBALL_URL="http://firmware.diydrones.com/Tools/PX4-tools/$ARM_TARBALL"