diff --git a/hcloud/client.go b/hcloud/client.go
index 5be4c7b5..917bb513 100644
--- a/hcloud/client.go
+++ b/hcloud/client.go
@@ -65,7 +65,7 @@ type Client struct {
 	applicationVersion      string
 	userAgent               string
 	debugWriter             io.Writer
-	instrumentationRegistry *prometheus.Registry
+	instrumentationRegistry prometheus.Registerer
 
 	Action           ActionClient
 	Certificate      CertificateClient
@@ -163,7 +163,7 @@ func WithHTTPClient(httpClient *http.Client) ClientOption {
 }
 
 // WithInstrumentation configures a Client to collect metrics about the performed HTTP requests.
-func WithInstrumentation(registry *prometheus.Registry) ClientOption {
+func WithInstrumentation(registry prometheus.Registerer) ClientOption {
 	return func(client *Client) {
 		client.instrumentationRegistry = registry
 	}
diff --git a/hcloud/internal/instrumentation/metrics.go b/hcloud/internal/instrumentation/metrics.go
index aa57c710..e52bd606 100644
--- a/hcloud/internal/instrumentation/metrics.go
+++ b/hcloud/internal/instrumentation/metrics.go
@@ -13,11 +13,11 @@ import (
 
 type Instrumenter struct {
 	subsystemIdentifier     string // will be used as part of the metric name (hcloud_<identifier>_requests_total)
-	instrumentationRegistry *prometheus.Registry
+	instrumentationRegistry prometheus.Registerer
 }
 
 // New creates a new Instrumenter. The subsystemIdentifier will be used as part of the metric names (e.g. hcloud_<identifier>_requests_total).
-func New(subsystemIdentifier string, instrumentationRegistry *prometheus.Registry) *Instrumenter {
+func New(subsystemIdentifier string, instrumentationRegistry prometheus.Registerer) *Instrumenter {
 	return &Instrumenter{subsystemIdentifier: subsystemIdentifier, instrumentationRegistry: instrumentationRegistry}
 }
 
@@ -84,7 +84,7 @@ func (i *Instrumenter) instrumentRoundTripperEndpoint(counter *prometheus.Counte
 // registerOrReuse will try to register the passed Collector, but in case a conflicting collector was already registered,
 // it will instead return that collector. Make sure to always use the collector return by this method.
 // Similar to [Registry.MustRegister] it will panic if any other error occurs.
-func registerOrReuse[C prometheus.Collector](registry *prometheus.Registry, collector C) C {
+func registerOrReuse[C prometheus.Collector](registry prometheus.Registerer, collector C) C {
 	err := registry.Register(collector)
 	if err != nil {
 		// If we get a AlreadyRegisteredError we can return the existing collector
diff --git a/hcloud/metadata/client.go b/hcloud/metadata/client.go
index aa796d27..f9634c36 100644
--- a/hcloud/metadata/client.go
+++ b/hcloud/metadata/client.go
@@ -22,7 +22,7 @@ type Client struct {
 	timeout  time.Duration
 
 	httpClient              *http.Client
-	instrumentationRegistry *prometheus.Registry
+	instrumentationRegistry prometheus.Registerer
 }
 
 // A ClientOption is used to configure a [Client].
@@ -43,7 +43,7 @@ func WithHTTPClient(httpClient *http.Client) ClientOption {
 }
 
 // WithInstrumentation configures a [Client] to collect metrics about the performed HTTP requests.
-func WithInstrumentation(registry *prometheus.Registry) ClientOption {
+func WithInstrumentation(registry prometheus.Registerer) ClientOption {
 	return func(client *Client) {
 		client.instrumentationRegistry = registry
 	}