diff --git a/tasks/scripts/bump-chart-app-version b/tasks/scripts/bump-chart-app-version
index b844d048..24c3abcf 100755
--- a/tasks/scripts/bump-chart-app-version
+++ b/tasks/scripts/bump-chart-app-version
@@ -11,9 +11,9 @@ pushd concourse-chart
 
   git --no-pager diff
 
-  git config --global user.email "ci@localhost"
+  git config --global user.email "ci@localhost.com"
   git config --global user.name "CI Bot"
 
   git add -A
-  git commit -m "bump app version and image tag"
+  git commit -m "bump app version and image tag" --signoff
 popd
diff --git a/tasks/scripts/bump-chart-version b/tasks/scripts/bump-chart-version
index 25e39ada..48421078 100755
--- a/tasks/scripts/bump-chart-version
+++ b/tasks/scripts/bump-chart-version
@@ -10,9 +10,9 @@ pushd concourse-chart
 
   git diff
 
-  git config --global user.email "ci@localhost"
+  git config --global user.email "ci@localhost.com"
   git config --global user.name "CI Bot"
 
   git add -A
-  git diff-index --quiet HEAD || git commit -m 'bump chart version'
+  git diff-index --quiet HEAD || git commit -m 'bump chart version' --signoff
 popd
diff --git a/tasks/scripts/bump-concourse-blobs b/tasks/scripts/bump-concourse-blobs
index deccc9aa..50f4e3fd 100755
--- a/tasks/scripts/bump-concourse-blobs
+++ b/tasks/scripts/bump-concourse-blobs
@@ -31,5 +31,5 @@ pushd bumped-concourse-release-repo/
   bosh -n upload-blobs
 
   git add -A
-  git commit -m "bump concourse"
+  git commit -m "bump concourse" --signoff
 popd
diff --git a/tasks/scripts/bump-postgres-chart-version b/tasks/scripts/bump-postgres-chart-version
index 22c3bb15..0b07ed09 100755
--- a/tasks/scripts/bump-postgres-chart-version
+++ b/tasks/scripts/bump-postgres-chart-version
@@ -10,9 +10,9 @@ pushd concourse-chart
 
   helm dependency update
 
-  git config --global user.email "ci@localhost"
+  git config --global user.email "ci@localhost.com"
   git config --global user.name "CI Bot"
 
   git add -A
-  git commit -m "bump postgres version"
+  git commit -m "bump postgres version" --signoff
 popd