diff --git a/v2/internal/frontend/assetserver/mimecache.go b/v2/internal/frontend/assetserver/mimecache.go
index ae33f7a54..470e66cc0 100644
--- a/v2/internal/frontend/assetserver/mimecache.go
+++ b/v2/internal/frontend/assetserver/mimecache.go
@@ -35,7 +35,7 @@ func GetMimetype(filename string, data []byte) string {
 	}
 
 	if filepath.Ext(filename) == ".js" && strings.HasPrefix(result, "text/plain") {
-		result = strings.Replace(result, "text/plain", "text/javascript", 1)
+		result = strings.Replace(result, "text/plain", "application/javascript", 1)
 	}
 
 	if result == "" {
diff --git a/v2/internal/frontend/assetserver/mimecache_test.go b/v2/internal/frontend/assetserver/mimecache_test.go
index d6dbb9dfc..d36dab6bf 100644
--- a/v2/internal/frontend/assetserver/mimecache_test.go
+++ b/v2/internal/frontend/assetserver/mimecache_test.go
@@ -14,7 +14,7 @@ func TestGetMimetype(t *testing.T) {
 	}{
 		// TODO: Add test cases.
 		{"css", args{"test.css", []byte("body{margin:0;padding:0;background-color:#d579b2}#app{font-family:Avenir,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-align:center;color:#2c3e50;background-color:#ededed}#nav{padding:30px}#nav a{font-weight:700;color:#2c\n3e50}#nav a.router-link-exact-active{color:#42b983}.hello[data-v-4e26ad49]{margin:10px 0}")}, "text/css; charset=utf-8"},
-		{"js", args{"test.js", []byte("let foo = 'bar'; console.log(foo);")}, "text/javascript; charset=utf-8"},
+		{"js", args{"test.js", []byte("let foo = 'bar'; console.log(foo);")}, "application/javascript; charset=utf-8"},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {