--- a/testing/docker/builder/VERSION
+++ b/testing/docker/builder/VERSION
@@ -1,1 +1,1 @@
-0.5.11
+0.5.12

--- a/testing/docker/centos6-build-upd/Dockerfile
+++ b/testing/docker/centos6-build-upd/Dockerfile
@@ -1,9 +1,9 @@
-FROM          taskcluster/centos6-build:0.1.5
+FROM          taskcluster/centos6-build:0.1.6
 MAINTAINER    Dustin J. Mitchell <dustin@mozilla.com>
 
 ### update to latest from upstream repositories
 # if this becomes a long list of packages, consider bumping the
 # centos6-build version
 RUN yum update -y
 
 # Set a default command useful for debugging

--- a/testing/docker/centos6-build-upd/VERSION
+++ b/testing/docker/centos6-build-upd/VERSION
@@ -1,1 +1,1 @@
-0.1.5.20160323120600
+0.1.6.20160329195300

--- a/testing/docker/centos6-build/VERSION
+++ b/testing/docker/centos6-build/VERSION
@@ -1,1 +1,1 @@
-0.1.5
+0.1.6

--- a/testing/docker/centos6-build/system-setup.sh
+++ b/testing/docker/centos6-build/system-setup.sh
@@ -416,18 +416,18 @@ cd $BUILD
 pip2.7 install peep
 
 # remaining Python utilities are installed with `peep` from upstream
 # repositories; peep verifies file integrity for us
 cat >requirements.txt <<'EOF'
 # sha256: 90pZQ6kAXB6Je8-H9-ivfgDAb6l3e5rWkfafn6VKh9g
 virtualenv==13.1.2
 
-# sha256: W6lDjWqw25P3sHhrpjITjrZKncDZPjDd4rF7Mo_cbXo
-mercurial==3.7.2
+# sha256: wJnELXTi1SC2HdNyzZlrD6dgXAZheDT9exPHm5qaWzA
+mercurial==3.7.3
 EOF
 peep install -r requirements.txt
 
 # TC-VCS
 npm install -g taskcluster-vcs@2.3.18
 
 # Ninja
 cd $BUILD

--- a/testing/docker/desktop-build/Dockerfile
+++ b/testing/docker/desktop-build/Dockerfile
@@ -1,9 +1,9 @@
-FROM          taskcluster/centos6-build-upd:0.1.5.20160323120600
+FROM          taskcluster/centos6-build-upd:0.1.6.20160329195300
 MAINTAINER    Dustin J. Mitchell <dustin@mozilla.com>
 
 # Add build scripts; these are the entry points from the taskcluster worker, and
 # operate on environment variables
 ADD             bin /home/worker/bin
 RUN             chmod +x /home/worker/bin/*
 
 # Generate machine uuid file

--- a/testing/docker/desktop-test/Dockerfile
+++ b/testing/docker/desktop-test/Dockerfile
@@ -1,9 +1,9 @@
-FROM          taskcluster/ubuntu1204-test-upd:0.1.8.20160218152601
+FROM          taskcluster/ubuntu1204-test-upd:0.1.9.20160329211700
 MAINTAINER    Jonas Finnemann Jensen <jopsen@gmail.com>
 
 # Add utilities and configuration
 COPY           dot-config                    /home/worker/.config
 COPY           dot-pulse                     /home/worker/.pulse
 COPY           bin                           /home/worker/bin
 # This removes the requirement of a developer to call it with bash
 RUN            chmod +x bin/test.sh

--- a/testing/docker/ubuntu1204-test-upd/Dockerfile
+++ b/testing/docker/ubuntu1204-test-upd/Dockerfile
@@ -1,9 +1,9 @@
-FROM          taskcluster/ubuntu1204-test:0.1.8
+FROM          taskcluster/ubuntu1204-test:0.1.9
 MAINTAINER    Dustin J. Mitchell <dustin@mozilla.com>
 
 ### update to latest from upstream repositories
 # if this becomes a long list of packages, consider bumping the
 # ubunt1204-test version
 RUN apt-get update && apt-get upgrade -y --force-yes
 
 # Set a default command useful for debugging

--- a/testing/docker/ubuntu1204-test-upd/VERSION
+++ b/testing/docker/ubuntu1204-test-upd/VERSION
@@ -1,1 +1,1 @@
-0.1.8.20160218152601
+0.1.9.20160329211700

--- a/testing/docker/ubuntu1204-test/VERSION
+++ b/testing/docker/ubuntu1204-test/VERSION
@@ -1,1 +1,1 @@
-0.1.8
+0.1.9

--- a/testing/docker/ubuntu1204-test/system-setup.sh
+++ b/testing/docker/ubuntu1204-test/system-setup.sh
@@ -150,18 +150,18 @@ pip install peep-2.4.1.tar.gz
 # repositories; peep verifies file integrity for us
 cat >requirements.txt <<'EOF'
 # wheel
 # sha256: 90pZQ6kAXB6Je8-H9-ivfgDAb6l3e5rWkfafn6VKh9g
 # tarball:
 # sha256: qryO8YzdvYoqnH-SvEPi_qVLEUczDWXbkg7zzpgS49w
 virtualenv==13.1.2
 
-# sha256: tQ9peOfTn-DLKY-j-j6c5B0jVnIdFV5SiPnFfl8T6ac
-mercurial==3.5
+# sha256: wJnELXTi1SC2HdNyzZlrD6dgXAZheDT9exPHm5qaWzA
+mercurial==3.7.3
 EOF
 peep install -r requirements.txt
 
 # Install node
 tooltool_fetch <<'EOF'
 [
 {
     "size": 5676610,