diff --git a/install/installer/pkg/components/openvsx-proxy/configmap.go b/install/installer/pkg/components/openvsx-proxy/configmap.go
index ac2657eef2e0d2..4de958a49a2a82 100644
--- a/install/installer/pkg/components/openvsx-proxy/configmap.go
+++ b/install/installer/pkg/components/openvsx-proxy/configmap.go
@@ -22,7 +22,7 @@ func configmap(ctx *common.RenderContext) ([]runtime.Object, error) {
 		LogDebug:             false,
 		CacheDurationRegular: util.Duration(time.Minute),
 		CacheDurationBackup:  util.Duration(time.Hour * 72),
-		URLUpstream:          "https://open-vsx.org", // todo(sje): make configurable
+		URLUpstream:          ctx.Config.OpenVSX.URL,
 		URLLocal:             fmt.Sprintf("https://open-vsx.%s", ctx.Config.Domain),
 		MaxIdleConns:         1000,
 		MaxIdleConnsPerHost:  1000,
diff --git a/install/installer/pkg/config/v1/config.go b/install/installer/pkg/config/v1/config.go
index 7730c5ac2c2302..9b784bc7c14ddc 100644
--- a/install/installer/pkg/config/v1/config.go
+++ b/install/installer/pkg/config/v1/config.go
@@ -55,6 +55,7 @@ func (v version) Defaults(in interface{}) error {
 	cfg.Workspace.Runtime.FSShiftMethod = FSShiftFuseFS
 	cfg.Workspace.Runtime.ContainerDSocket = "/run/containerd/containerd.sock"
 	cfg.Workspace.Runtime.ContainerDRuntimeDir = "/var/lib/containerd/io.containerd.runtime.v2.task/k8s.io"
+	cfg.OpenVSX.URL = "https://open-vsx.org"
 
 	return nil
 }
@@ -82,6 +83,8 @@ type Config struct {
 
 	Workspace Workspace `json:"workspace" validate:"required"`
 
+	OpenVSX OpenVSX `json:"openVSX"`
+
 	AuthProviders []ObjectRef   `json:"authProviders" validate:"dive"`
 	BlockNewUsers BlockNewUsers `json:"blockNewUsers"`
 	License       *ObjectRef    `json:"license,omitempty"`
@@ -229,6 +232,10 @@ type Workspace struct {
 	Templates *WorkspaceTemplates `json:"templates,omitempty"`
 }
 
+type OpenVSX struct {
+	URL string `json:"url" validate:"url"`
+}
+
 type FSShiftMethod string
 
 const (
diff --git a/install/installer/pkg/config/v1/load.go b/install/installer/pkg/config/v1/load.go
index 576ce9cbc3c49d..ac5795d46e3905 100644
--- a/install/installer/pkg/config/v1/load.go
+++ b/install/installer/pkg/config/v1/load.go
@@ -50,6 +50,9 @@ func LoadMock() *Config {
 			Kind: ObjectRefSecret,
 			Name: "https-certs",
 		},
+		OpenVSX: OpenVSX{
+			URL: "https://open-vsx.org",
+		},
 		Workspace: Workspace{
 			Runtime: WorkspaceRuntime{
 				FSShiftMethod:        FSShiftFuseFS,