diff --git a/bump_release_version.sh b/bump_release_version.sh
index a322d61..92b5cac 100755
--- a/bump_release_version.sh
+++ b/bump_release_version.sh
@@ -24,6 +24,6 @@ get_versions_string
 # Add everything
 git add -A
 git commit --allow-empty -m "New release v$versions_string"
-git tag -a "v$versions_string" -m "New release v$versions_string"
+git tag -s "v$versions_string" -m "New release v$versions_string"
 
 popd > /dev/null
diff --git a/bump_test_version.sh b/bump_test_version.sh
index 847af31..bffb851 100755
--- a/bump_test_version.sh
+++ b/bump_test_version.sh
@@ -24,6 +24,6 @@ get_versions_string
 # Add everything
 git add -A
 git commit --allow-empty -m "New test release v$versions_string"
-git tag -a "v$versions_string" -m "New test release v$versions_string"
+git tag -s "v$versions_string" -m "New test release v$versions_string"
 
 popd > /dev/null