diff --git a/internal/server/static_delivery.go b/internal/server/static_delivery.go
index a6ba0f3d..9b11490e 100644
--- a/internal/server/static_delivery.go
+++ b/internal/server/static_delivery.go
@@ -17,7 +17,7 @@ import (
 
 func addVary(header http.Header, value string) {
 	for _, line := range header.Values("Vary") {
-		for _, existing := range strings.Split(line, ",") {
+		for existing := range strings.SplitSeq(line, ",") {
 			if strings.EqualFold(strings.TrimSpace(existing), value) {
 				return
 			}
@@ -154,7 +154,7 @@ const compressionMinLength = 1024
 
 func acceptsGzip(value string) bool {
 	wildcard := false
-	for _, part := range strings.Split(value, ",") {
+	for part := range strings.SplitSeq(value, ",") {
 		params := strings.Split(part, ";")
 		encoding := strings.TrimSpace(strings.ToLower(params[0]))
 		quality := 1.0
diff --git a/internal/server/static_delivery_test.go b/internal/server/static_delivery_test.go
index 19aa49c8..8c00fd0d 100644
--- a/internal/server/static_delivery_test.go
+++ b/internal/server/static_delivery_test.go
@@ -141,7 +141,7 @@ var compressionCases = []compressionTestCase{
 
 func headerContains(header http.Header, name, want string) bool {
 	for _, line := range header.Values(name) {
-		for _, value := range strings.Split(line, ",") {
+		for value := range strings.SplitSeq(line, ",") {
 			if strings.EqualFold(strings.TrimSpace(value), want) {
 				return true
 			}