diff --git a/pkg/helmexec/exec.go b/pkg/helmexec/exec.go
index 8c482d1e..661ff332 100644
--- a/pkg/helmexec/exec.go
+++ b/pkg/helmexec/exec.go
@@ -192,7 +192,7 @@ func (helm *execer) DiffRelease(context HelmContext, name, chart string, flags .
 	helm.logger.Infof("Comparing %v %v", name, chart)
 	preArgs := context.GetTillerlessArgs(helm.helmBinary)
 	env := context.getTillerlessEnv()
-	out, err := helm.exec(append(append(preArgs, "diff", "upgrade", "--allow-unreleased", name, chart), flags...), env)
+	out, err := helm.exec(append(append(preArgs, "diff", "upgrade", "--reset-values", "--allow-unreleased", name, chart), flags...), env)
 	// Do our best to write STDOUT only when diff existed
 	// Unfortunately, this works only when you run helmfile with `--detailed-exitcode`
 	detailedExitcodeEnabled := false
diff --git a/pkg/helmexec/exec_test.go b/pkg/helmexec/exec_test.go
index 85e2f0c8..d18c5cfd 100644
--- a/pkg/helmexec/exec_test.go
+++ b/pkg/helmexec/exec_test.go
@@ -234,8 +234,8 @@ func Test_DiffRelease(t *testing.T) {
 	helm := MockExecer(logger, "dev")
 	helm.DiffRelease(HelmContext{}, "release", "chart", "--timeout 10", "--wait")
 	expected := `Comparing release chart
-exec: helm diff upgrade --allow-unreleased release chart --timeout 10 --wait --kube-context dev
-exec: helm diff upgrade --allow-unreleased release chart --timeout 10 --wait --kube-context dev: 
+exec: helm diff upgrade --reset-values --allow-unreleased release chart --timeout 10 --wait --kube-context dev
+exec: helm diff upgrade --reset-values --allow-unreleased release chart --timeout 10 --wait --kube-context dev: 
 `
 	if buffer.String() != expected {
 		t.Errorf("helmexec.DiffRelease()\nactual = %v\nexpect = %v", buffer.String(), expected)
@@ -244,8 +244,8 @@ exec: helm diff upgrade --allow-unreleased release chart --timeout 10 --wait --k
 	buffer.Reset()
 	helm.DiffRelease(HelmContext{}, "release", "chart")
 	expected = `Comparing release chart
-exec: helm diff upgrade --allow-unreleased release chart --kube-context dev
-exec: helm diff upgrade --allow-unreleased release chart --kube-context dev: 
+exec: helm diff upgrade --reset-values --allow-unreleased release chart --kube-context dev
+exec: helm diff upgrade --reset-values --allow-unreleased release chart --kube-context dev: 
 `
 	if buffer.String() != expected {
 		t.Errorf("helmexec.DiffRelease()\nactual = %v\nexpect = %v", buffer.String(), expected)
@@ -258,8 +258,8 @@ func Test_DiffReleaseTillerless(t *testing.T) {
 	helm := MockExecer(logger, "dev")
 	helm.DiffRelease(HelmContext{Tillerless: true}, "release", "chart", "--timeout 10", "--wait")
 	expected := `Comparing release chart
-exec: helm tiller run -- helm diff upgrade --allow-unreleased release chart --timeout 10 --wait --kube-context dev
-exec: helm tiller run -- helm diff upgrade --allow-unreleased release chart --timeout 10 --wait --kube-context dev: 
+exec: helm tiller run -- helm diff upgrade --reset-values --allow-unreleased release chart --timeout 10 --wait --kube-context dev
+exec: helm tiller run -- helm diff upgrade --reset-values --allow-unreleased release chart --timeout 10 --wait --kube-context dev: 
 `
 	if buffer.String() != expected {
 		t.Errorf("helmexec.DiffRelease()\nactual = %v\nexpect = %v", buffer.String(), expected)