diff --git a/Makefile.global b/Makefile.global
index d8f335af..7a78e9b5 100644
--- a/Makefile.global
+++ b/Makefile.global
@@ -43,8 +43,8 @@ RELEASE_URL=https://notmuchmail.org/releases
 TAR_FILE=$(PACKAGE)-$(VERSION).tar.gz
 ELPA_FILE:=$(PACKAGE)-emacs-$(ELPA_VERSION).tar
 DEB_TAR_FILE=$(PACKAGE)_$(VERSION).orig.tar.gz
-SHA1_FILE=$(TAR_FILE).sha1
-GPG_FILE=$(SHA1_FILE).asc
+SHA256_FILE=$(TAR_FILE).sha256
+GPG_FILE=$(SHA256_FILE).asc
 
 PV_FILE=bindings/python/notmuch/version.py
 
diff --git a/Makefile.local b/Makefile.local
index 3548ed96..d2ef3e08 100644
--- a/Makefile.local
+++ b/Makefile.local
@@ -36,12 +36,11 @@ $(TAR_FILE):
 	gzip < $(TAR_FILE).tmp > $(TAR_FILE)
 	@echo "Source is ready for release in $(TAR_FILE)"
 
-$(SHA1_FILE): $(TAR_FILE)
-	sha1sum $^ > $@
+$(SHA256_FILE): $(TAR_FILE)
+	sha256sum $^ > $@
 
-$(GPG_FILE): $(SHA1_FILE)
-	@echo "Please enter your GPG password to sign the checksum."
-	gpg --armor --sign $^ 
+$(GPG_FILE): $(SHA256_FILE)
+	gpg --armor --sign $^
 
 .PHONY: dist
 dist: $(TAR_FILE)