diff --git a/Makefile b/Makefile
index df50ed77b..6a777dfc2 100644
--- a/Makefile
+++ b/Makefile
@@ -7,11 +7,12 @@ BUILDDIR ?= $(BUILDBASE)/scrapy_$(FULL_VERSION).orig
 BUILDTAR ?= $(BUILDBASE)/scrapy_$(FULL_VERSION).orig.tar.gz
 
 help:
-	@echo 'Commonly used make targets:'
+	@echo 'Available targets:'
 	@echo '  deb-binary   - build debian binary package'
 	@echo '  deb-source   - build debian source package'
 	@echo '  deb-all      - build source and binary debian packages'
 	@echo '  tarball      - build source tarball'
+	@echo '  sign         - sign release'
 
 deb-binary: deb-prepare
 	cd $(BUILDDIR); debuild -i -us -uc -b
@@ -35,3 +36,9 @@ deb-prepare:
 
 tarball:
 	python setup.py sdist
+
+sign:
+	md5sum dist/Scrapy-* > dist/MD5SUMS
+	sha1sum dist/Scrapy-* > dist/SHA1SUMS
+	gpg -ba dist/MD5SUMS
+	gpg -ba dist/SHA1SUMS
diff --git a/extras/sign_release.sh b/extras/sign_release.sh
deleted file mode 100755
index 6aac50987..000000000
--- a/extras/sign_release.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/sh
-# Script to sign a Scrapy release. To be run from root dir in Scrapy
-# distribution.
-
-cd dist
-md5sum Scrapy-* > MD5SUMS
-sha1sum Scrapy-* > SHA1SUMS
-gpg -ba MD5SUMS
-gpg -ba SHA1SUMS
-
-# list files created
-ls -l