diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8c73bc8..8793029 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+- Replace deprecated `httputil.ReverseProxy.Director` with `Rewrite` in `pkg/proxy/server.go`; `Director` is deprecated since Go 1.26 (SA1019); `Rewrite` achieves the same Host-preservation behaviour and has been available since Go 1.20.
+
 ## [1.3.0] - 2026-03-08
 
 ### Added
diff --git a/pkg/proxy/server.go b/pkg/proxy/server.go
index ae82057..d8b71a3 100644
--- a/pkg/proxy/server.go
+++ b/pkg/proxy/server.go
@@ -35,13 +35,11 @@ func StartServer(opts ServerOptions, d detector.Detector) error {
 		Level: slog.LevelInfo,
 	}))
 
-	proxy := httputil.NewSingleHostReverseProxy(target)
-
-	// Preserve the original Host header
-	originalDirector := proxy.Director
-	proxy.Director = func(req *http.Request) {
-		originalDirector(req)
-		req.Host = target.Host
+	proxy := &httputil.ReverseProxy{
+		Rewrite: func(r *httputil.ProxyRequest) {
+			r.SetURL(target)
+			r.Out.Host = target.Host
+		},
 	}
 
 	action := ParseAction(opts.Action)