diff --git a/CHANGELOG.md b/CHANGELOG.md
index e505609..e65432f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 Lists the changes in the gocmlclient package.
 
+## Version 0.0.22
+
+- added HideLinks node property
+- added another HTTP request error condition
+- ran gofumpt over the code base
+
 ## Version 0.0.20 and 0.0.21
 
 - added more cases where an error results in ErrSystemNotReady
diff --git a/apiclient.go b/apiclient.go
index 7a45f41..3d335ca 100644
--- a/apiclient.go
+++ b/apiclient.go
@@ -54,7 +54,6 @@ func (c *Client) apiRequest(ctx context.Context, method string, path string, dat
 }
 
 func (c *Client) doAPI(ctx context.Context, req *http.Request, depth int32) ([]byte, error) {
-
 	if c.state.get() == stateInitial {
 		c.state.set(stateCheckVersion)
 		c.compatibilityErr = c.versionCheck(ctx, depth)
@@ -79,7 +78,7 @@ retry:
 	res, err := c.httpClient.Do(req)
 	if err != nil {
 		if urlError, ok := (err).(*url.Error); ok {
-			if urlError.Timeout() {
+			if urlError.Timeout() || urlError.Temporary() {
 				return nil, ErrSystemNotReady
 			}
 		}
@@ -166,7 +165,6 @@ func (c *Client) jsonDelete(ctx context.Context, api string, depth int32) error
 }
 
 func (c *Client) jsonReq(ctx context.Context, method, api string, data io.Reader, result any, depth int32) error {
-
 	// during initialization, the API client does API calls recursively which
 	// leads to all sorts of nasty race problems.  The below basically prevents
 	// any additional API calls when recursion happens during initialization or
diff --git a/apiclient_test.go b/apiclient_test.go
index d065e4c..a516d32 100644
--- a/apiclient_test.go
+++ b/apiclient_test.go
@@ -49,7 +49,6 @@ func TestClient_compatibility(t *testing.T) {
 }
 
 func TestClient_putpatch(t *testing.T) {
-
 	putResponse := mr.MockRespList{
 		mr.MockResp{Code: 204},
 	}
diff --git a/auth_test.go b/auth_test.go
index 703a8c9..dfbc4c9 100644
--- a/auth_test.go
+++ b/auth_test.go
@@ -12,7 +12,6 @@ import (
 )
 
 func TestClient_authenticate(t *testing.T) {
-
 	tc := newTestAPIclient()
 	tc.client.state.set(stateAuthRequired)
 	tc.client.userpass = userPass{"qwe", "qwe"}
@@ -76,7 +75,6 @@ func TestClient_authenticate(t *testing.T) {
 }
 
 func TestClient_token_auth(t *testing.T) {
-
 	tc := newAuthedTestAPIclient()
 	tc.client.apiToken = "sometoken"
 	tc.client.userpass = userPass{}
@@ -183,7 +181,6 @@ func TestClient_SetCACert(t *testing.T) {
 }
 
 func TestClient_complete(t *testing.T) {
-
 	tc := newTestAPIclient()
 
 	tc.mr.SetData(mr.MockRespList{
@@ -232,7 +229,6 @@ func TestClient_complete(t *testing.T) {
 }
 
 func TestClient_Race(t *testing.T) {
-
 	// GOFLAGS="-count=1000" time go test -race -parallel 2  . -run 'Race$'
 	t.Parallel()
 
diff --git a/cmd/ctest/main.go b/cmd/ctest/main.go
index 09543a5..271ea3a 100644
--- a/cmd/ctest/main.go
+++ b/cmd/ctest/main.go
@@ -10,7 +10,6 @@ import (
 )
 
 func main() {
-
 	// address and lab id
 	host, found := os.LookupEnv("CML_HOST")
 	if !found {
diff --git a/extconn.go b/extconn.go
new file mode 100644
index 0000000..bd88e7c
--- /dev/null
+++ b/extconn.go
@@ -0,0 +1,80 @@
+package cmlclient
+
+import (
+	"context"
+	"fmt"
+)
+
+/*
+[
+  {
+    "id": "58568fbb-e1f8-4b83-a1f8-148c656eed39",
+    "device_name": "virbr0",
+    "label": "NAT",
+    "protected": false,
+    "snooped": true,
+    "tags": [
+      "NAT"
+    ],
+    "operational": {
+      "forwarding": "NAT",
+      "label": "NAT",
+      "mtu": 1500,
+      "exists": true,
+      "enabled": true,
+      "protected": false,
+      "snooped": true,
+      "stp": false,
+      "interface": null,
+      "ip_networks": []
+    }
+  }
+]
+*/
+
+// Operational data struct
+type opdata struct {
+	Forwarding string `json:"forwarding"`
+	Label      string `json:"label"`
+	MTU        int    `json:"mtu"`
+	Exists     bool   `json:"exits"`
+	Enabled    bool   `json:"enabled"`
+	Protected  bool   `json:"protected"`
+	Snooped    bool   `json:"snooped"`
+	STP        bool   `json:"stp"`
+	// Interface  string   `json:"interface"`
+	IPNetworks []string `json:"ip_networks"`
+}
+
+// ExtConn defines the data structure for a CML external connector
+type ExtConn struct {
+	ID          string   `json:"id"`
+	DeviceName  string   `json:"device_name"`
+	Label       string   `json:"label"`
+	Protected   bool     `json:"protected"`
+	Snooped     bool     `json:"snooped"`
+	Tags        []string `json:"tags"`
+	Operational opdata   `json:"operational"`
+}
+
+// ExtConnGet returns the external connector specified by the ID given
+func (c *Client) ExtConnGet(ctx context.Context, extConnID string) (*ExtConn, error) {
+	api := fmt.Sprintf("system/external_connectors/%s", extConnID)
+	extconn := &ExtConn{}
+	err := c.jsonGet(ctx, api, extconn, 0)
+	if err != nil {
+		return nil, err
+	}
+	return extconn, err
+}
+
+// ExtConnectors returns all external connectors on the system
+func (c *Client) ExtConnectors(ctx context.Context) ([]*ExtConn, error) {
+	api := fmt.Sprintf("system/external_connectors")
+	extconnlist := make([]*ExtConn, 0)
+	err := c.jsonGet(ctx, api, &extconnlist, 0)
+	if err != nil {
+		return nil, err
+	}
+	return extconnlist, err
+}
diff --git a/extconn_test.go b/extconn_test.go
new file mode 100644
index 0000000..6e86cfb
--- /dev/null
+++ b/extconn_test.go
@@ -0,0 +1,71 @@
+package cmlclient
+
+import (
+	"testing"
+
+	mr "github.com/rschmied/mockresponder"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestClient_ExtConns(t *testing.T) {
+	tc := newAuthedTestAPIclient()
+
+	extConn := []byte(`
+	  {
+		"id": "58568fbb-e1f8-4b83-a1f8-148c656eed39",
+		"device_name": "virbr0",
+		"label": "NAT",
+		"protected": false,
+		"snooped": true,
+		"tags": [
+		  "NAT"
+		],
+		"operational": {
+		  "forwarding": "NAT",
+		  "label": "NAT",
+		  "mtu": 1500,
+		  "exists": true,
+		  "enabled": true,
+		  "protected": false,
+		  "snooped": true,
+		  "stp": false,
+		  "interface": null,
+		  "ip_networks": []
+		}
+	  }
+	`)
+	extConns := append([]byte(`[`), extConn...)
+	extConns = append(extConns, []byte(`]`)...)
+
+	tests := []struct {
+		name    string
+		data    mr.MockRespList
+		wantErr bool
+	}{
+		{"good", mr.MockRespList{mr.MockResp{Data: extConns}}, false},
+		{"badjson", mr.MockRespList{mr.MockResp{Data: []byte(`///`)}}, true},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			tc.mr.SetData(tt.data)
+			got, err := tc.client.ExtConnectors(tc.ctx)
+			if err != nil {
+				if !tt.wantErr {
+					t.Error("unexpected error!", err)
+				}
+				return
+			}
+			assert.NoError(t, err)
+			assert.Len(t, got, 1)
+			assert.True(t, got[0].Label == "NAT")
+		})
+	}
+
+	t.Run("single", func(t *testing.T) {
+		tc.mr.SetData(mr.MockRespList{mr.MockResp{Data: extConn}})
+		got, err := tc.client.ExtConnGet(tc.ctx, "58568fbb-e1f8-4b83-a1f8-148c656eed39")
+		assert.NoError(t, err)
+		assert.Equal(t, got.ID, "58568fbb-e1f8-4b83-a1f8-148c656eed39")
+		assert.True(t, got.Label == "NAT")
+	})
+}
diff --git a/go.mod b/go.mod
index 1d8097c..e6c9684 100644
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,7 @@ require (
 	github.com/Masterminds/semver/v3 v3.2.1
 	github.com/rschmied/mockresponder v1.0.4
 	github.com/stretchr/testify v1.8.2
-	golang.org/x/sync v0.1.0
+	golang.org/x/sync v0.5.0
 )
 
 require (
diff --git a/go.sum b/go.sum
index 67299cd..2ddc45d 100644
--- a/go.sum
+++ b/go.sum
@@ -14,8 +14,8 @@ github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.2 h1:+h33VjcLVPDHtOdpUCuF+7gSuG3yGIftsP1YvFihtJ8=
 github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
-golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=
-golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.5.0 h1:60k92dhOjHxJkrqnwsfl8KuaHbn/5dl0lUPUklKo3qE=
+golang.org/x/sync v0.5.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/groups_test.go b/groups_test.go
index 99c2d80..1946216 100644
--- a/groups_test.go
+++ b/groups_test.go
@@ -49,7 +49,6 @@ var (
 )
 
 func TestClient_GetGroups(t *testing.T) {
-
 	tc := newAuthedTestAPIclient()
 
 	tests := []struct {
@@ -109,7 +108,6 @@ func TestClient_GetGroups(t *testing.T) {
 }
 
 func TestClient_GetGroupByName(t *testing.T) {
-
 	tc := newAuthedTestAPIclient()
 
 	tests := []struct {
@@ -167,7 +165,6 @@ func TestClient_GetGroupByName(t *testing.T) {
 }
 
 func TestClient_GetGroup(t *testing.T) {
-
 	tc := newAuthedTestAPIclient()
 
 	// ID of group1 from above
@@ -243,7 +240,6 @@ func TestClient_GroupDestroy(t *testing.T) {
 }
 
 func TestClient_GroupCreate(t *testing.T) {
-
 	tc := newAuthedTestAPIclient()
 	newGroup := Group{Name: "doesntmatter"}
 
@@ -299,7 +295,6 @@ func TestClient_GroupCreate(t *testing.T) {
 }
 
 func TestClient_GroupUpdate(t *testing.T) {
-
 	tc := newAuthedTestAPIclient()
 	newGroup := Group{Name: "doesntmatter"}
 
diff --git a/iface.go b/iface.go
index 4d09ab9..4b8074b 100644
--- a/iface.go
+++ b/iface.go
@@ -224,7 +224,6 @@ func (c *Client) getInterfacesForNode(ctx context.Context, node *Node) error {
 
 // InterfaceGet returns the interface identified by its `ID` (iface.ID).
 func (c *Client) InterfaceGet(ctx context.Context, iface *Interface) (*Interface, error) {
-
 	if iface, ok := c.getCachedIface(iface); ok {
 		return iface, nil
 	}
@@ -238,7 +237,6 @@ func (c *Client) InterfaceGet(ctx context.Context, iface *Interface) (*Interface
 // is >= 0, the request creates all unallocated slots up to and including
 // that slot. Conversely, if the slot is < 0 (e.g. -1), the next free slot is used.
 func (c *Client) InterfaceCreate(ctx context.Context, labID, nodeID string, slot int) (*Interface, error) {
-
 	var slotPtr *int
 
 	if slot >= 0 {
diff --git a/iface_test.go b/iface_test.go
index 7d1536e..b70d82c 100644
--- a/iface_test.go
+++ b/iface_test.go
@@ -158,7 +158,6 @@ func TestClient_IfaceDelete(t *testing.T) {
 }
 
 func Test_Race(t *testing.T) {
-
 	tc := newAuthedTestAPIclient()
 	tc.client.useCache = true
 
diff --git a/imagedef_test.go b/imagedef_test.go
index 90199c4..1313141 100644
--- a/imagedef_test.go
+++ b/imagedef_test.go
@@ -269,7 +269,6 @@ import (
 // ]
 
 func TestClient_GetImageDefs(t *testing.T) {
-
 	tc := newAuthedTestAPIclient()
 
 	aimgdef := `{
diff --git a/lab.go b/lab.go
index 1aed008..42f7b73 100644
--- a/lab.go
+++ b/lab.go
@@ -45,12 +45,14 @@ type LabGroup struct {
 	Permission string `json:"permission"`
 }
 
-type IDlist []string
-type NodeMap map[string]*Node
-type InterfaceList []*Interface
-type nodeList []*Node
-type linkList []*Link
-type LabGroupList []*LabGroup
+type (
+	IDlist        []string
+	NodeMap       map[string]*Node
+	InterfaceList []*Interface
+	nodeList      []*Node
+	linkList      []*Link
+	LabGroupList  []*LabGroup
+)
 
 type labAlias struct {
 	Lab
@@ -185,7 +187,6 @@ func (c *Client) deleteCachedLab(id string, err error) error {
 
 // LabCreate creates a new lab on the controller.
 func (c *Client) LabCreate(ctx context.Context, lab Lab) (*Lab, error) {
-
 	// TODO: inconsistent attributes lab_title vs title, ...
 	postAlias := labPatchPostAlias{
 		Title:       lab.Title,
@@ -212,7 +213,6 @@ func (c *Client) LabCreate(ctx context.Context, lab Lab) (*Lab, error) {
 
 // LabUpdate updates specific fields of a lab (title, description and notes).
 func (c *Client) LabUpdate(ctx context.Context, lab Lab) (*Lab, error) {
-
 	// TODO: inconsistent attributes lab_title vs title, ...
 	patchAlias := labPatchPostAlias{
 		Title:       lab.Title,
@@ -290,7 +290,6 @@ func (c *Client) LabDestroy(ctx context.Context, id string) error {
 // LabGetByTitle returns the lab identified by its `title`. For the use of
 // `deep` see LabGet().
 func (c *Client) LabGetByTitle(ctx context.Context, title string, deep bool) (*Lab, error) {
-
 	var data map[string]map[string]*labAlias
 
 	err := c.jsonGet(ctx, "populate_lab_tiles", &data, 0)
@@ -315,7 +314,6 @@ func (c *Client) LabGetByTitle(ctx context.Context, title string, deep bool) (*L
 // then the nodes, their interfaces and links are also fetched from the controller.
 // Also, with `deep`, the L3 IP address info is fetched for the given lab.
 func (c *Client) LabGet(ctx context.Context, id string, deep bool) (*Lab, error) {
-
 	if lab, ok := c.getCachedLab(id, deep); ok {
 		return lab, nil
 	}
@@ -333,7 +331,6 @@ func (c *Client) LabGet(ctx context.Context, id string, deep bool) (*Lab, error)
 }
 
 func (c *Client) labFill(ctx context.Context, la *labAlias) (*Lab, error) {
-
 	var err error
 	g, ctx := errgroup.WithContext(ctx)
 
diff --git a/lab_test.go b/lab_test.go
index ccea24b..bb0e388 100644
--- a/lab_test.go
+++ b/lab_test.go
@@ -307,7 +307,6 @@ func TestClient_ImportLabBadAuth(t *testing.T) {
 }
 
 func TestClient_NodeByLabel(t *testing.T) {
-
 	l := Lab{
 		Nodes: NodeMap{
 			"bla": &Node{
@@ -579,6 +578,7 @@ func TestClient_LabGetByTitle(t *testing.T) {
 		})
 	}
 }
+
 func TestClient_LabCreate(t *testing.T) {
 	tc := newAuthedTestAPIclient()
 
diff --git a/link.go b/link.go
index 6ed800e..bbc77f7 100644
--- a/link.go
+++ b/link.go
@@ -95,10 +95,8 @@ func (c *Client) LinkGet(ctx context.Context, labID, linkID string, deep bool) (
 	link.LabID = labID
 
 	if deep {
-		var (
-			err error
-			// ifaceA, ifaceB *Interface
-		)
+		var err error
+		// ifaceA, ifaceB *Interface
 
 		ifaceA := &Interface{
 			ID:    link.SrcID,
diff --git a/node.go b/node.go
index a0e48bb..7572888 100644
--- a/node.go
+++ b/node.go
@@ -69,6 +69,7 @@ type Node struct {
 	Label           string         `json:"label"`
 	X               int            `json:"x"`
 	Y               int            `json:"y"`
+	HideLinks       bool           `json:"hide_links"`
 	NodeDefinition  string         `json:"node_definition"`
 	ImageDefinition string         `json:"image_definition"`
 	Configuration   *string        `json:"configuration"`
@@ -92,6 +93,7 @@ type nodePatchPostAlias struct {
 	Label           string   `json:"label,omitempty"`
 	X               int      `json:"x"`
 	Y               int      `json:"y"`
+	HideLinks       bool     `json:"hide_links"`
 	NodeDefinition  string   `json:"node_definition,omitempty"`
 	ImageDefinition string   `json:"image_definition,omitempty"`
 	Configuration   *string  `json:"configuration,omitempty"`
@@ -109,6 +111,7 @@ func newNodeAlias(node *Node, update bool) nodePatchPostAlias {
 	npp.Label = node.Label
 	npp.X = node.X
 	npp.Y = node.Y
+	npp.HideLinks = node.HideLinks
 	npp.Tags = node.Tags
 
 	// node tags can't be null, either the tag has to be omitted or it has
@@ -156,6 +159,7 @@ func (c *Client) updateCachedNode(existingNode, node *Node) *Node {
 	existingNode.X = node.X
 	existingNode.Y = node.Y
 	existingNode.Tags = node.Tags
+	existingNode.HideLinks = node.HideLinks
 
 	// these can be changed but only when the node VM doesn't exist
 	if node.State == NodeStateDefined {
@@ -322,7 +326,6 @@ func (c *Client) NodeStop(ctx context.Context, node *Node) error {
 // NodeCreate creates a new node on the controller based on the data provided
 // in `node`. Label, node definition and image definition must be provided.
 func (c *Client) NodeCreate(ctx context.Context, node *Node) (*Node, error) {
-
 	// TODO: inconsistent attributes lab_title vs title, ..
 	node.State = NodeStateDefined
 	postAlias := newNodeAlias(node, false)
@@ -383,7 +386,6 @@ func (c *Client) NodeCreate(ctx context.Context, node *Node) (*Node, error) {
 
 // NodeGet returns the node identified by its `ID` and `LabID` in the provided node.
 func (c *Client) NodeGet(ctx context.Context, node *Node, nocache bool) (*Node, error) {
-
 	if !nocache {
 		if node, ok := c.getCachedNode(node.LabID, node.ID); ok {
 			return node, nil
diff --git a/nodedef_test.go b/nodedef_test.go
index f29b381..5305d10 100644
--- a/nodedef_test.go
+++ b/nodedef_test.go
@@ -8,7 +8,6 @@ import (
 )
 
 func TestClient_GetNodeDefs(t *testing.T) {
-
 	tc := newAuthedTestAPIclient()
 
 	nodeDefs := []byte(`[
diff --git a/system.go b/system.go
index c464643..f138c76 100644
--- a/system.go
+++ b/system.go
@@ -31,7 +31,6 @@ func versionError(got string) error {
 }
 
 func (c *Client) versionCheck(ctx context.Context, depth int32) error {
-
 	c.compatibilityErr = nil
 	sv := systemVersion{}
 	if err := c.jsonGet(ctx, systeminfoAPI, &sv, depth); err != nil {
diff --git a/system_test.go b/system_test.go
index 70559e3..80f2c58 100644
--- a/system_test.go
+++ b/system_test.go
@@ -8,7 +8,6 @@ import (
 )
 
 func TestClient_VersionCheck(t *testing.T) {
-
 	c := New("https://bla.bla", true, useCache)
 	mrClient, ctx := mr.NewMockResponder()
 	c.httpClient = mrClient
@@ -42,7 +41,6 @@ func TestClient_VersionCheck(t *testing.T) {
 }
 
 func TestClient_NotReady(t *testing.T) {
-
 	c := New("https://bla.bla", true, useCache)
 	mrClient, ctx := mr.NewMockResponder()
 	c.httpClient = mrClient
@@ -66,7 +64,6 @@ func TestClient_Version(t *testing.T) {
 		version string
 		want    string
 	}{
-
 		{"empty", "", ""},
 		{"some", "some", "some"},
 	}
diff --git a/users_test.go b/users_test.go
index 8c2bbc6..6e28d78 100644
--- a/users_test.go
+++ b/users_test.go
@@ -48,7 +48,6 @@ var (
 )
 
 func TestClient_GetUsers(t *testing.T) {
-
 	tc := newAuthedTestAPIclient()
 
 	tests := []struct {
@@ -108,7 +107,6 @@ func TestClient_GetUsers(t *testing.T) {
 }
 
 func TestClient_GetUserByName(t *testing.T) {
-
 	tc := newAuthedTestAPIclient()
 
 	tests := []struct {
@@ -169,7 +167,6 @@ func TestClient_GetUserByName(t *testing.T) {
 }
 
 func TestClient_GetUser(t *testing.T) {
-
 	tc := newAuthedTestAPIclient()
 
 	// ID of user1 from above
@@ -245,7 +242,6 @@ func TestClient_UserDestroy(t *testing.T) {
 }
 
 func TestClient_UserCreate(t *testing.T) {
-
 	tc := newAuthedTestAPIclient()
 	newUser := User{Username: "doesntmatter"}
 
@@ -300,7 +296,6 @@ func TestClient_UserCreate(t *testing.T) {
 }
 
 func TestClient_UserUpdate(t *testing.T) {
-
 	tc := newAuthedTestAPIclient()
 	newUser := User{Username: "doesntmatter"}
 
@@ -359,7 +354,6 @@ func TestClient_UserUpdate(t *testing.T) {
 }
 
 func TestClient_UserGroups(t *testing.T) {
-
 	tc := newAuthedTestAPIclient()
 
 	tests := []struct {
diff --git a/vendor/golang.org/x/sync/errgroup/errgroup.go b/vendor/golang.org/x/sync/errgroup/errgroup.go
index cbee7a4..b18efb7 100644
--- a/vendor/golang.org/x/sync/errgroup/errgroup.go
+++ b/vendor/golang.org/x/sync/errgroup/errgroup.go
@@ -20,7 +20,7 @@ type token struct{}
 // A zero Group is valid, has no limit on the number of active goroutines,
 // and does not cancel on error.
 type Group struct {
-	cancel func()
+	cancel func(error)
 
 	wg sync.WaitGroup
 
@@ -43,7 +43,7 @@ func (g *Group) done() {
 // returns a non-nil error or the first time Wait returns, whichever occurs
 // first.
 func WithContext(ctx context.Context) (*Group, context.Context) {
-	ctx, cancel := context.WithCancel(ctx)
+	ctx, cancel := withCancelCause(ctx)
 	return &Group{cancel: cancel}, ctx
 }
 
@@ -52,7 +52,7 @@ func WithContext(ctx context.Context) (*Group, context.Context) {
 func (g *Group) Wait() error {
 	g.wg.Wait()
 	if g.cancel != nil {
-		g.cancel()
+		g.cancel(g.err)
 	}
 	return g.err
 }
@@ -76,7 +76,7 @@ func (g *Group) Go(f func() error) {
 			g.errOnce.Do(func() {
 				g.err = err
 				if g.cancel != nil {
-					g.cancel()
+					g.cancel(g.err)
 				}
 			})
 		}
@@ -105,7 +105,7 @@ func (g *Group) TryGo(f func() error) bool {
 			g.errOnce.Do(func() {
 				g.err = err
 				if g.cancel != nil {
-					g.cancel()
+					g.cancel(g.err)
 				}
 			})
 		}
diff --git a/vendor/golang.org/x/sync/errgroup/go120.go b/vendor/golang.org/x/sync/errgroup/go120.go
new file mode 100644
index 0000000..f93c740
--- /dev/null
+++ b/vendor/golang.org/x/sync/errgroup/go120.go
@@ -0,0 +1,13 @@
+// Copyright 2023 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build go1.20
+
+package errgroup
+
+import "context"
+
+func withCancelCause(parent context.Context) (context.Context, func(error)) {
+	return context.WithCancelCause(parent)
+}
diff --git a/vendor/golang.org/x/sync/errgroup/pre_go120.go b/vendor/golang.org/x/sync/errgroup/pre_go120.go
new file mode 100644
index 0000000..88ce334
--- /dev/null
+++ b/vendor/golang.org/x/sync/errgroup/pre_go120.go
@@ -0,0 +1,14 @@
+// Copyright 2023 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build !go1.20
+
+package errgroup
+
+import "context"
+
+func withCancelCause(parent context.Context) (context.Context, func(error)) {
+	ctx, cancel := context.WithCancel(parent)
+	return ctx, func(error) { cancel() }
+}
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 2b60350..dad1024 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -13,8 +13,8 @@ github.com/rschmied/mockresponder
 # github.com/stretchr/testify v1.8.2
 ## explicit; go 1.13
 github.com/stretchr/testify/assert
-# golang.org/x/sync v0.1.0
-## explicit
+# golang.org/x/sync v0.5.0
+## explicit; go 1.18
 golang.org/x/sync/errgroup
 # gopkg.in/yaml.v3 v3.0.1
 ## explicit