diff --git a/erlang.mk b/erlang.mk
index fa127d1e..0541d58f 100644
--- a/erlang.mk
+++ b/erlang.mk
@@ -17,7 +17,7 @@
 ERLANG_MK_FILENAME := $(realpath $(lastword $(MAKEFILE_LIST)))
 export ERLANG_MK_FILENAME
 
-ERLANG_MK_VERSION = 2018.05.15
+ERLANG_MK_VERSION = 9fff0a1
 ERLANG_MK_WITHOUT = 
 
 # Make 3.81 and 3.82 are deprecated.
@@ -6707,7 +6707,7 @@ endif
 RELX ?= $(ERLANG_MK_TMP)/relx
 RELX_CONFIG ?= $(CURDIR)/relx.config
 
-RELX_URL ?= https://github.com/erlware/relx/releases/download/v3.23.0/relx
+RELX_URL ?= https://erlang.mk/res/relx-v3.24.5
 RELX_OPTS ?=
 RELX_OUTPUT_DIR ?= _rel
 RELX_REL_EXT ?=