diff --git a/_proto/hapi/services/tiller.proto b/_proto/hapi/services/tiller.proto
index e8342ac8a7867fd4a367e1c87567a873c208288b..aa30a642640793bfb0298add7dff7bc365e4d0dd 100644
--- a/_proto/hapi/services/tiller.proto
+++ b/_proto/hapi/services/tiller.proto
@@ -192,6 +192,8 @@ message UpdateReleaseRequest {
 	bool recreate = 6;
 	// timeout specifies the max amount of time any kubernetes client command can run.
 	int64 timeout = 7;
+	// ResetValues will cause Tiller to ignore stored values, resetting to default values.
+	bool reset_values = 8;
 }
 
 // UpdateReleaseResponse is the response to an update request.
diff --git a/cmd/helm/upgrade.go b/cmd/helm/upgrade.go
index 6d9ac1faa9c77a8f167f89a55e6ea8f258023419..30cf641e847fc31439bea34d95fd9865b47d2a80 100644
--- a/cmd/helm/upgrade.go
+++ b/cmd/helm/upgrade.go
@@ -64,6 +64,7 @@ type upgradeCmd struct {
 	namespace    string
 	version      string
 	timeout      int64
+	resetValues  bool
 }
 
 func newUpgradeCmd(client helm.Interface, out io.Writer) *cobra.Command {
@@ -104,6 +105,7 @@ func newUpgradeCmd(client helm.Interface, out io.Writer) *cobra.Command {
 	f.StringVar(&upgrade.namespace, "namespace", "default", "namespace to install the release into (only used if --install is set)")
 	f.StringVar(&upgrade.version, "version", "", "specify the exact chart version to use. If this is not specified, the latest version is used")
 	f.Int64Var(&upgrade.timeout, "timeout", 300, "time in seconds to wait for any individual kubernetes operation (like Jobs for hooks)")
+	f.BoolVar(&upgrade.resetValues, "reset-values", false, "when upgrading, reset the values to the ones built into the chart")
 
 	f.MarkDeprecated("disable-hooks", "use --no-hooks instead")
 
@@ -156,7 +158,8 @@ func (u *upgradeCmd) run() error {
 		helm.UpgradeDryRun(u.dryRun),
 		helm.UpgradeRecreate(u.recreate),
 		helm.UpgradeDisableHooks(u.disableHooks),
-		helm.UpgradeTimeout(u.timeout))
+		helm.UpgradeTimeout(u.timeout),
+		helm.ResetValues(u.resetValues))
 	if err != nil {
 		return fmt.Errorf("UPGRADE FAILED: %v", prettyError(err))
 	}
diff --git a/cmd/helm/upgrade_test.go b/cmd/helm/upgrade_test.go
index 19334a9174b2176e019588eee1fd4b2dc57f2342..0b485639aa7cd7346e43ea1c4d5aeb3a4ff70abc 100644
--- a/cmd/helm/upgrade_test.go
+++ b/cmd/helm/upgrade_test.go
@@ -93,6 +93,13 @@ func TestUpgradeCmd(t *testing.T) {
 			resp:     releaseMock(&releaseOptions{name: "funny-bunny", version: 3, chart: ch2}),
 			expected: "Release \"funny-bunny\" has been upgraded. Happy Helming!\n",
 		},
+		{
+			name:     "upgrade a release with --reset-values",
+			args:     []string{"funny-bunny", chartPath},
+			flags:    []string{"--reset-values", "true"},
+			resp:     releaseMock(&releaseOptions{name: "funny-bunny", version: 4, chart: ch2}),
+			expected: "Release \"funny-bunny\" has been upgraded. Happy Helming!\n",
+		},
 		{
 			name:     "install a release with 'upgrade --install'",
 			args:     []string{"zany-bunny", chartPath},
diff --git a/pkg/helm/client.go b/pkg/helm/client.go
index 91e666362ad3114a3f04a11b6a169341b4e17e4d..893284b8f0dae6524b56433c4ea88f94974cd21b 100644
--- a/pkg/helm/client.go
+++ b/pkg/helm/client.go
@@ -134,6 +134,7 @@ func (h *Client) UpdateRelease(rlsName string, chstr string, opts ...UpdateOptio
 	req.Name = rlsName
 	req.DisableHooks = h.opts.disableHooks
 	req.Recreate = h.opts.recreate
+	req.ResetValues = h.opts.resetValues
 	ctx := NewContext()
 
 	if h.opts.before != nil {
diff --git a/pkg/helm/option.go b/pkg/helm/option.go
index ad615fb090503ef8b3bd9a81b41906f8c7e3c393..bb28570a89b0a06c5820ded50331d69090b35daa 100644
--- a/pkg/helm/option.go
+++ b/pkg/helm/option.go
@@ -64,6 +64,8 @@ type options struct {
 	before func(context.Context, proto.Message) error
 	// release history options are applied directly to the get release history request
 	histReq rls.GetHistoryRequest
+	// resetValues instructs Tiller to reset values to their defaults.
+	resetValues bool
 }
 
 // Host specifies the host address of the Tiller release server, (default = ":44134").
@@ -270,6 +272,12 @@ func UpgradeDryRun(dry bool) UpdateOption {
 	}
 }
 
+func ResetValues(reset bool) UpdateOption {
+	return func(opts *options) {
+		opts.resetValues = reset
+	}
+}
+
 // UpgradeRecreate will (if true) recreate pods after upgrade.
 func UpgradeRecreate(recreate bool) UpdateOption {
 	return func(opts *options) {
diff --git a/pkg/proto/hapi/services/tiller.pb.go b/pkg/proto/hapi/services/tiller.pb.go
index 5c244e1bc0834b45d88ea409aa2e4341e122e89b..bb773f82696bfc54922c05b95095d807d48707c7 100644
--- a/pkg/proto/hapi/services/tiller.pb.go
+++ b/pkg/proto/hapi/services/tiller.pb.go
@@ -250,6 +250,8 @@ type UpdateReleaseRequest struct {
 	Recreate bool `protobuf:"varint,6,opt,name=recreate" json:"recreate,omitempty"`
 	// timeout specifies the max amount of time any kubernetes client command can run.
 	Timeout int64 `protobuf:"varint,7,opt,name=timeout" json:"timeout,omitempty"`
+	// ResetValues will cause Tiller to ignore stored values, resetting to default values.
+	ResetValues bool `protobuf:"varint,8,opt,name=reset_values,json=resetValues" json:"reset_values,omitempty"`
 }
 
 func (m *UpdateReleaseRequest) Reset()                    { *m = UpdateReleaseRequest{} }
@@ -892,72 +894,73 @@ var _ReleaseService_serviceDesc = grpc.ServiceDesc{
 func init() { proto.RegisterFile("hapi/services/tiller.proto", fileDescriptor0) }
 
 var fileDescriptor0 = []byte{
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+	0x31, 0x99, 0x60, 0x6a, 0x99, 0xa7, 0xe5, 0xd6, 0x5e, 0xe7, 0x44, 0x40, 0x29, 0x86, 0x87, 0x82,
+	0xb4, 0x2e, 0x99, 0x60, 0x77, 0x5b, 0xa8, 0xc7, 0xef, 0xd4, 0xf9, 0x15, 0xea, 0x0a, 0xde, 0xe9,
+	0x80, 0x29, 0x9c, 0x47, 0xdb, 0x50, 0xbb, 0x1e, 0xfc, 0x30, 0x78, 0xf1, 0xf3, 0xa0, 0xb9, 0x85,
+	0xea, 0x50, 0x19, 0x9c, 0xff, 0xd8, 0x6b, 0x1a, 0x68, 0x1f, 0x76, 0xaf, 0xce, 0x87, 0x3f, 0x8d,
+	0xdc, 0xde, 0x55, 0xef, 0x7c, 0xd8, 0x7b, 0xde, 0x2c, 0x39, 0x1f, 0x42, 0x23, 0xf1, 0x0a, 0xd5,
+	0xa0, 0x7c, 0x3e, 0xec, 0x8a, 0x23, 0xcf, 0x7b, 0xc3, 0x6e, 0xd3, 0x70, 0xfe, 0x34, 0xe0, 0x40,
+	0xbf, 0x04, 0x3a, 0x27, 0x21, 0xc5, 0xf1, 0x2d, 0x8c, 0xc9, 0x22, 0x4c, 0x6e, 0x81, 0x2f, 0x10,
+	0x82, 0x4a, 0x88, 0xdf, 0xa8, 0x3b, 0xe0, 0xef, 0xb1, 0x26, 0x23, 0xcc, 0x0b, 0x38, 0xff, 0x65,
+	0x57, 0x2c, 0xd0, 0x57, 0x50, 0x97, 0xc1, 0x51, 0xab, 0x72, 0x5a, 0x6e, 0x6d, 0x77, 0x0e, 0xf5,
+	0x90, 0xa5, 0x45, 0x37, 0x51, 0x73, 0xfa, 0x70, 0xdc, 0xc7, 0xca, 0x13, 0xc1, 0x88, 0xca, 0x89,
+	0xd8, 0xae, 0x37, 0xc3, 0xdc, 0x99, 0xd8, 0xae, 0x37, 0xc3, 0xc8, 0x82, 0x9a, 0x4c, 0x28, 0xee,
+	0x4e, 0xd5, 0x55, 0x4b, 0x87, 0x81, 0xf5, 0x10, 0x48, 0xc6, 0x95, 0x85, 0xf4, 0x29, 0x54, 0xe2,
+	0x74, 0xe6, 0x30, 0xdb, 0x1d, 0xa4, 0xfb, 0x79, 0x19, 0x4e, 0x89, 0xcb, 0xe5, 0xe8, 0x7d, 0x68,
+	0xc4, 0xfa, 0x74, 0xee, 0x8d, 0x31, 0x8f, 0xb6, 0xe1, 0xde, 0x6f, 0x38, 0x17, 0xab, 0x56, 0xbb,
+	0x24, 0x64, 0x38, 0x64, 0x9b, 0xf9, 0x7f, 0x05, 0x27, 0x19, 0x48, 0x32, 0x80, 0x33, 0xa8, 0x49,
+	0xd7, 0x38, 0x5a, 0x2e, 0xaf, 0x4a, 0xcb, 0xf9, 0xbb, 0x04, 0x07, 0xd7, 0xf3, 0x89, 0xc7, 0xb0,
+	0x12, 0xad, 0x71, 0xea, 0x31, 0x54, 0x79, 0x5b, 0x90, 0x5c, 0xec, 0x0b, 0x6c, 0xd1, 0x3b, 0xba,
+	0xf1, 0xaf, 0x2b, 0xe4, 0xe8, 0x09, 0x98, 0x77, 0x5e, 0xb0, 0xc0, 0x94, 0x13, 0x91, 0xb0, 0x26,
+	0x35, 0x79, 0x4f, 0x71, 0xa5, 0x06, 0x3a, 0x86, 0xda, 0x24, 0x5a, 0x8e, 0xa2, 0x45, 0xc8, 0x8b,
+	0xac, 0xee, 0x9a, 0x93, 0x68, 0xe9, 0x2e, 0x42, 0xf4, 0x31, 0xec, 0x4e, 0x7c, 0xea, 0xdd, 0x04,
+	0x78, 0x74, 0x4b, 0xc8, 0x6b, 0xca, 0xeb, 0xac, 0xee, 0xee, 0xc8, 0xcd, 0x8b, 0x78, 0x0f, 0xd9,
+	0x71, 0x26, 0x8d, 0x23, 0xec, 0x31, 0x6c, 0x99, 0x5c, 0x9e, 0xac, 0x63, 0x0e, 0x99, 0x3f, 0xc3,
+	0x64, 0xc1, 0xac, 0x1a, 0xcf, 0x3e, 0xb5, 0x44, 0x1f, 0xc1, 0x4e, 0x84, 0x29, 0x66, 0x23, 0xe9,
+	0x65, 0x9d, 0x9f, 0xdc, 0xe6, 0x7b, 0x2f, 0xf9, 0x96, 0x73, 0x01, 0x87, 0x29, 0x5e, 0x36, 0xa5,
+	0xf8, 0x5f, 0x03, 0x8e, 0x5c, 0x12, 0x04, 0x37, 0xde, 0xf8, 0x75, 0x01, 0x92, 0x57, 0xf8, 0x28,
+	0xad, 0xe7, 0xa3, 0x9c, 0xc1, 0xc7, 0x4a, 0xde, 0x54, 0xb4, 0xbc, 0xd1, 0x98, 0xaa, 0xe6, 0x33,
+	0x65, 0x6a, 0x4c, 0x39, 0xdf, 0xc3, 0xf1, 0x03, 0xdf, 0x37, 0x25, 0xe2, 0xaf, 0x12, 0x1c, 0x5e,
+	0x86, 0x94, 0x79, 0x41, 0x90, 0xe2, 0x21, 0x49, 0x2c, 0xa3, 0x70, 0x62, 0x95, 0xde, 0x25, 0xb1,
+	0xca, 0x1a, 0x91, 0x8a, 0xf5, 0xca, 0x0a, 0xeb, 0x85, 0x92, 0x4d, 0x2b, 0x71, 0x33, 0x55, 0xe2,
+	0xe8, 0x03, 0x80, 0x08, 0x2f, 0x28, 0x1e, 0x71, 0xf0, 0x1a, 0x3f, 0xdf, 0xe0, 0x3b, 0x03, 0x59,
+	0xd1, 0x8a, 0xe3, 0xba, 0xce, 0xf1, 0x25, 0x1c, 0xa5, 0x69, 0xd9, 0x94, 0xe2, 0x3f, 0x0c, 0x38,
+	0xbe, 0x0e, 0xfd, 0x4c, 0x92, 0xb3, 0x92, 0xed, 0x41, 0xd8, 0xa5, 0x8c, 0xb0, 0x0f, 0xa0, 0x3a,
+	0x5f, 0x44, 0xaf, 0xb0, 0xa4, 0x51, 0x2c, 0x56, 0xe3, 0xa9, 0xe8, 0xf1, 0x8c, 0xc0, 0x7a, 0xe8,
+	0xc3, 0x86, 0x11, 0xc5, 0x5e, 0x27, 0xed, 0xb7, 0x21, 0x5a, 0xad, 0xf3, 0x08, 0xf6, 0xfb, 0x98,
+	0xbd, 0x14, 0x89, 0x2d, 0xc3, 0x73, 0x7a, 0x80, 0x56, 0x37, 0xef, 0xed, 0xc9, 0x2d, 0xdd, 0x9e,
+	0xfa, 0xda, 0x50, 0xfa, 0x4a, 0xcb, 0xf9, 0x86, 0x63, 0x5f, 0xf8, 0x94, 0x91, 0x68, 0xb9, 0x8e,
+	0xba, 0x26, 0x94, 0x67, 0xde, 0x1b, 0xd9, 0x9d, 0xe3, 0x57, 0xa7, 0xcf, 0x3d, 0x48, 0x8e, 0x4a,
+	0x0f, 0x56, 0x67, 0x9d, 0x51, 0x68, 0xd6, 0x75, 0xfe, 0xab, 0xc1, 0x9e, 0x1a, 0x50, 0xe2, 0x73,
+	0x02, 0xf9, 0xb0, 0xb3, 0x3a, 0x89, 0xd1, 0x67, 0xf9, 0x5f, 0x1b, 0xa9, 0x4f, 0x26, 0xfb, 0x49,
+	0x11, 0x55, 0xe1, 0xac, 0xb3, 0xf5, 0xa5, 0x81, 0x28, 0x34, 0xd3, 0x03, 0x12, 0x3d, 0xcd, 0xc6,
+	0xc8, 0x99, 0xc8, 0x76, 0xbb, 0xa8, 0xba, 0x32, 0x8b, 0xee, 0x38, 0xed, 0xfa, 0x54, 0x43, 0x6f,
+	0x85, 0xd1, 0x07, 0xa9, 0x7d, 0x56, 0x58, 0x3f, 0xb1, 0xfb, 0x1b, 0xec, 0x6a, 0x6d, 0x1e, 0xe5,
+	0xb0, 0x95, 0x35, 0x23, 0xed, 0xcf, 0x0b, 0xe9, 0x26, 0xb6, 0x66, 0xb0, 0xa7, 0xd7, 0x39, 0xca,
+	0x01, 0xc8, 0x6c, 0x92, 0xf6, 0x17, 0xc5, 0x94, 0x13, 0x73, 0x14, 0x9a, 0xe9, 0x32, 0xcc, 0xbb,
+	0xc7, 0x9c, 0x96, 0x91, 0x77, 0x8f, 0x79, 0xd5, 0xed, 0x6c, 0x21, 0x0f, 0xe0, 0xbe, 0x0a, 0xd1,
+	0xe3, 0xdc, 0x0b, 0xd1, 0x8b, 0xd7, 0x6e, 0xbd, 0x5d, 0x31, 0x31, 0x31, 0x87, 0xf7, 0x52, 0x23,
+	0x09, 0xe5, 0x50, 0x93, 0x3d, 0x75, 0xed, 0xa7, 0x05, 0xb5, 0x53, 0x41, 0xc9, 0xc2, 0x5e, 0x13,
+	0x94, 0xde, 0x35, 0xd6, 0x04, 0x95, 0xea, 0x11, 0xce, 0xd6, 0x33, 0xf8, 0xa5, 0xae, 0xf4, 0x6e,
+	0x4c, 0xfe, 0x17, 0xe8, 0xeb, 0xff, 0x03, 0x00, 0x00, 0xff, 0xff, 0x83, 0x62, 0xce, 0x77, 0xd3,
+	0x0d, 0x00, 0x00,
 }
diff --git a/pkg/tiller/release_server.go b/pkg/tiller/release_server.go
index ff9ad7bb3d97597947fb259154922bd7a7499f13..55c583bc9b09365dc5d653df5b4399bb815a0be2 100644
--- a/pkg/tiller/release_server.go
+++ b/pkg/tiller/release_server.go
@@ -323,11 +323,26 @@ func (s *ReleaseServer) performUpdate(originalRelease, updatedRelease *release.R
 	return res, nil
 }
 
-// reuseValues copies values from the current release to a new release if the new release does not have any values.
+// reuseValues copies values from the current release to a new release if the
+// new release does not have any values.
 //
-// If the request already has values, or if there are no values in the current release, this does nothing.
+// If the request already has values, or if there are no values in the current
+// release, this does nothing.
+//
+// This is skipped if the req.ResetValues flag is set, in which case the
+// request values are not altered.
 func (s *ReleaseServer) reuseValues(req *services.UpdateReleaseRequest, current *release.Release) {
-	if (req.Values == nil || req.Values.Raw == "" || req.Values.Raw == "{}\n") && current.Config != nil && current.Config.Raw != "" && current.Config.Raw != "{}\n" {
+	if req.ResetValues {
+		// If ResetValues is set, we comletely ignore current.Config.
+		log.Print("Reset values to the chart's original version.")
+		return
+	}
+	// If req.Values is empty, but current. config is not, copy current into the
+	// request.
+	if (req.Values == nil || req.Values.Raw == "" || req.Values.Raw == "{}\n") &&
+		current.Config != nil &&
+		current.Config.Raw != "" &&
+		current.Config.Raw != "{}\n" {
 		log.Printf("Copying values from %s (v%d) to new release.", current.Name, current.Version)
 		req.Values = current.Config
 	}
diff --git a/pkg/tiller/release_server_test.go b/pkg/tiller/release_server_test.go
index aa1b5cf7cb259dc6f503bfbe02c8e6d3f73f781f..1a414013f5719e7243d0ce3001a6bb7639d4aba8 100644
--- a/pkg/tiller/release_server_test.go
+++ b/pkg/tiller/release_server_test.go
@@ -667,6 +667,32 @@ func TestUpdateRelease(t *testing.T) {
 		t.Errorf("Expected release version to be %v, got %v", 2, res.Release.Version)
 	}
 }
+func TestUpdateReleaseResetValues(t *testing.T) {
+	c := helm.NewContext()
+	rs := rsFixture()
+	rel := releaseStub()
+	rs.env.Releases.Create(rel)
+
+	req := &services.UpdateReleaseRequest{
+		Name: rel.Name,
+		Chart: &chart.Chart{
+			Metadata: &chart.Metadata{Name: "hello"},
+			Templates: []*chart.Template{
+				{Name: "templates/hello", Data: []byte("hello: world")},
+				{Name: "templates/hooks", Data: []byte(manifestWithUpgradeHooks)},
+			},
+		},
+		ResetValues: true,
+	}
+	res, err := rs.UpdateRelease(c, req)
+	if err != nil {
+		t.Fatalf("Failed updated: %s", err)
+	}
+	// This should have been unset. Config:  &chart.Config{Raw: `name: value`},
+	if res.Release.Config != nil && res.Release.Config.Raw != "" {
+		t.Errorf("Expected chart config to be empty, got %q", res.Release.Config.Raw)
+	}
+}
 
 func TestUpdateReleaseFailure(t *testing.T) {
 	c := helm.NewContext()