diff --git a/Makefile b/Makefile
index 8f7afb442..80de4d417 100644
--- a/Makefile
+++ b/Makefile
@@ -7,11 +7,11 @@ PLUGN_VERSION ?= 0.8.2
 PROCFILE_VERSION ?= 0.14.1
 SIGIL_VERSION ?= 0.8.1
 SSHCOMMAND_VERSION ?= 0.15.0
-DOCKER_IMAGE_LABELER_URL ?= https://github.com/dokku/docker-image-labeler/releases/download/v${DOCKER_IMAGE_LABELER_VERSION}/docker-image-labeler_${DOCKER_IMAGE_LABELER_VERSION}_linux_x86_64.tgz
-NETRC_URL ?= https://github.com/dokku/netrc/releases/download/v${NETRC_VERSION}/netrc_${NETRC_VERSION}_linux_x86_64.tgz
-PLUGN_URL ?= https://github.com/dokku/plugn/releases/download/v${PLUGN_VERSION}/plugn_${PLUGN_VERSION}_linux_x86_64.tgz
-PROCFILE_UTIL_URL ?= https://github.com/josegonzalez/go-procfile-util/releases/download/v${PROCFILE_VERSION}/procfile-util_${PROCFILE_VERSION}_linux_x86_64.tgz
-SIGIL_URL ?= https://github.com/gliderlabs/sigil/releases/download/v${SIGIL_VERSION}/sigil_${SIGIL_VERSION}_Linux_x86_64.tgz
+DOCKER_IMAGE_LABELER_URL ?= https://github.com/dokku/docker-image-labeler/releases/download/v${DOCKER_IMAGE_LABELER_VERSION}/docker-image-labeler_${DOCKER_IMAGE_LABELER_VERSION}_linux_amd64.tgz
+NETRC_URL ?= https://github.com/dokku/netrc/releases/download/v${NETRC_VERSION}/netrc_${NETRC_VERSION}_linux_amd64.tgz
+PLUGN_URL ?= https://github.com/dokku/plugn/releases/download/v${PLUGN_VERSION}/plugn_${PLUGN_VERSION}_linux_amd64.tgz
+PROCFILE_UTIL_URL ?= https://github.com/josegonzalez/go-procfile-util/releases/download/v${PROCFILE_VERSION}/procfile-util_${PROCFILE_VERSION}_linux_amd64.tgz
+SIGIL_URL ?= https://github.com/gliderlabs/sigil/releases/download/v${SIGIL_VERSION}/gliderlabs-sigil_${SIGIL_VERSION}_linux_amd64.tgz
 SSHCOMMAND_URL ?= https://github.com/dokku/sshcommand/releases/download/v${SSHCOMMAND_VERSION}/sshcommand_${SSHCOMMAND_VERSION}_linux_x86_64.tgz
 STACK_URL ?= https://github.com/gliderlabs/herokuish.git
 PREBUILT_STACK_URL ?= gliderlabs/herokuish:latest-20