diff --git a/bench/bench.sh b/bench/bench.sh
index 428ab62..38d2951 100644
--- a/bench/bench.sh
+++ b/bench/bench.sh
@@ -1,13 +1,29 @@
 #!/bin/sh
 
+# echo "----------------------------"
+# echo "Benchmark on rpxy"
+# ab -c 16 -n 10000 http://127.0.0.1:8080/index.html
+
+# echo "----------------------------"
+# echo "Benchmark on nginx"
+# ab -c 16 -n 10000  http://127.0.0.1:8090/index.html
+
+# echo "----------------------------"
+# echo "Benchmark on caddy"
+# ab -c 16 -n 10000  http://127.0.0.1:8100/index.html
+
+
 echo "----------------------------"
 echo "Benchmark on rpxy"
-ab -c 100 -n 10000 http://127.0.0.1:8080/index.html # TODO: localhost = 127.0.0.1を解決できるように決めておかんとだめそう
+#wrk -t8 -c100 -d30s http://127.0.0.1:8080/index.html
+rewrk -c 256 -t 8 -d 15s -h http://127.0.0.1:8080 --pct
 
 echo "----------------------------"
 echo "Benchmark on nginx"
-ab -c 100 -n 10000  http://127.0.0.1:8090/index.html
+# wrk -t8 -c100 -d30s http://127.0.0.1:8090/index.html
+rewrk -c 256 -t 8 -d 15s -h http://127.0.0.1:8090 --pct
 
 echo "----------------------------"
 echo "Benchmark on caddy"
-ab -c 100 -n 10000  http://127.0.0.1:8100/index.html
+# wrk -t8 -c100 -d30s http://127.0.0.1:8100/index.html
+rewrk -c 256 -t 8 -d 15s -h http://127.0.0.1:8100 --pct
diff --git a/bench/rpxy.toml b/bench/rpxy.toml
index 4c80774..8fb25be 100644
--- a/bench/rpxy.toml
+++ b/bench/rpxy.toml
@@ -16,7 +16,7 @@ reverse_proxy = [
   # Array for load balancing
   { upstream = [
     { location = 'backend-nginx', tls = false, upstream_options = [
-      "override_host",
+      # "override_host",
     ] },
   ] },
   # { upstream = [{ location = '192.168.100.100', tls = false }] },
diff --git a/src/proxy/proxy_handler.rs b/src/proxy/proxy_handler.rs
index f4fc2c3..c65d44e 100644
--- a/src/proxy/proxy_handler.rs
+++ b/src/proxy/proxy_handler.rs
@@ -212,6 +212,7 @@ fn generate_request_forwarded<B: core::fmt::Debug>(
   remove_hop_header(headers);
   // X-Forwarded-For
   add_forwarding_header(headers, client_addr)?;
+  println!("{:?}", headers);
 
   // Add te: trailer if te_trailer
   if te_trailers {
@@ -285,7 +286,7 @@ fn add_forwarding_header(headers: &mut HeaderMap, client_addr: SocketAddr) -> Re
     hyper::header::Entry::Vacant(entry) => {
       entry.insert(client_ip.to_string().parse()?);
     }
-    hyper::header::Entry::Occupied(entry) => {
+    hyper::header::Entry::Occupied(mut entry) => {
       let client_ip_str = client_ip.to_string();
       let mut addr = String::with_capacity(entry.get().as_bytes().len() + 2 + client_ip_str.len());
 
@@ -293,6 +294,7 @@ fn add_forwarding_header(headers: &mut HeaderMap, client_addr: SocketAddr) -> Re
       addr.push(',');
       addr.push(' ');
       addr.push_str(&client_ip_str);
+      entry.insert(addr.to_owned().parse()?);
     }
   }
   Ok(())