diff --git a/Dockerfile.osx b/Dockerfile.osx
index 18302085..af254f65 100644
--- a/Dockerfile.osx
+++ b/Dockerfile.osx
@@ -26,7 +26,7 @@ RUN curl -fsSL -o /vbox.dmg http://download.virtualbox.org/virtualbox/$VBOX_VERS
 
 # Download the Docker parts
 
-ENV DOCKER_VERSION 1.9.0-rc3
+ENV DOCKER_VERSION 1.9.0-rc4
 RUN curl -fsSL -o /docker https://test.docker.com/builds/Darwin/x86_64/docker-$DOCKER_VERSION
 RUN chmod +x /docker
 
@@ -35,7 +35,7 @@ RUN curl -fsSL -o /docker-machine.zip https://github.com/docker/machine/releases
 RUN 7z x /docker-machine.zip && rm -f /docker-machine.zip
 RUN chmod +x /docker-machine*
 
-ENV DOCKER_COMPOSE_VERSION 1.5.0rc2
+ENV DOCKER_COMPOSE_VERSION 1.5.0rc3
 RUN curl -fsSL -o /docker-compose https://github.com/docker/compose/releases/download/$DOCKER_COMPOSE_VERSION/docker-compose-Darwin-x86_64
 RUN chmod +x /docker-compose
 
@@ -46,7 +46,7 @@ RUN curl -fsSL -o /boot2docker.iso https://github.com/tianon/boot2docker-legacy/
 ENV KITEMATIC_VERSION 0.9.2
 RUN curl -fsSL -o /kitematic.zip https://github.com/kitematic/kitematic/releases/download/v$KITEMATIC_VERSION/Kitematic-$KITEMATIC_VERSION-Mac.zip
 
-ENV INSTALLER_VERSION 1.9.0-rc3
+ENV INSTALLER_VERSION 1.9.0-rc4
 
 ENV MIXPANEL_TOKEN c306ae65c33d7d09fe3e546f36493a6e
 
diff --git a/Dockerfile.windows b/Dockerfile.windows
index 752fd03a..44a493d7 100644
--- a/Dockerfile.windows
+++ b/Dockerfile.windows
@@ -17,10 +17,10 @@ RUN cd innosetup && \
     wine "./innounp.exe" -e "is-unicode.exe"
 
 # installer components
-ENV INSTALLER_VERSION 1.9.0-rc3
-ENV DOCKER_VERSION 1.9.0-rc3
+ENV INSTALLER_VERSION 1.9.0-rc4
+ENV DOCKER_VERSION 1.9.0-rc4
 ENV DOCKER_MACHINE_VERSION 0.5.0-rc4
-ENV DOCKER_COMPOSE_VERSION 1.5.0rc2
+ENV DOCKER_COMPOSE_VERSION 1.5.0rc3
 ENV BOOT2DOCKER_ISO_VERSION $DOCKER_VERSION
 ENV KITEMATIC_VERSION 0.9.2
 ENV VIRTUALBOX_VERSION 5.0.8