diff --git a/.gitignore b/.gitignore
index 944982f..f26ee3f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,3 +12,4 @@
 *.dwarf
 .DS_Store
 /vendor/
+Makefile.local
diff --git a/Makefile b/Makefile
index 132d6ea..4c5c63a 100644
--- a/Makefile
+++ b/Makefile
@@ -5,7 +5,9 @@ SHELL := bash
 .DELETE_ON_ERROR:
 .SUFFIXES:
 
-CODESIGN_IDENTITY ?= 66837B7A624EA4CDB507D40C6940C74A740EF5B1
+-include Makefile.local
+
+CODESIGN_IDENTITY ?=
 CRFLAGS           ?=
 CRYSTAL           ?= $(shell which crystal)
 HOST_ARCH         := $(shell uname -m)