diff --git a/injectproxy/routes.go b/injectproxy/routes.go
index 0094caff..71093501 100644
--- a/injectproxy/routes.go
+++ b/injectproxy/routes.go
@@ -44,10 +44,11 @@ const (
 )
 
 type routes struct {
-	upstream *url.URL
-	handler  http.Handler
-	label    string
-	el       ExtractLabeler
+	upstream   *url.URL
+	handler    http.Handler
+	httpClient *http.Client
+	label      string
+	el         ExtractLabeler
 
 	mux                   http.Handler
 	modifiers             map[string]func(*http.Response) error
@@ -529,6 +530,8 @@ func NewRoutes(upstream *url.URL, label string, extractLabeler ExtractLabeler, o
 		transport.TLSClientConfig.Certificates = []tls.Certificate{cert}
 	}
 
+	r.httpClient = &http.Client{Transport: transport}
+
 	proxy.Transport = transport
 	proxy.ModifyResponse = r.ModifyResponse
 	proxy.ErrorHandler = r.errorHandler
diff --git a/injectproxy/silences.go b/injectproxy/silences.go
index 4f463ff3..0c759fdd 100644
--- a/injectproxy/silences.go
+++ b/injectproxy/silences.go
@@ -203,7 +203,7 @@ func (r *routes) deleteSilence(w http.ResponseWriter, req *http.Request) {
 
 func (r *routes) getSilenceByID(ctx context.Context, id string) (*models.GettableSilence, error) {
 	amc := client.New(
-		runtimeclient.New(r.upstream.Host, path.Join(r.upstream.Path, "/api/v2"), []string{r.upstream.Scheme}),
+		runtimeclient.NewWithClient(r.upstream.Host, path.Join(r.upstream.Path, "/api/v2"), []string{r.upstream.Scheme}, r.httpClient),
 		strfmt.Default,
 	)
 	params := silence.NewGetSilenceParams().WithContext(ctx)