diff --git a/src/h1/codec.rs b/src/h1/codec.rs
index f9f455e5d..3174e78ea 100644
--- a/src/h1/codec.rs
+++ b/src/h1/codec.rs
@@ -149,6 +149,9 @@ impl Encoder for Codec {
     ) -> Result<(), Self::Error> {
         match item {
             Message::Item((mut res, length)) => {
+                // set response version
+                res.head_mut().version = self.version;
+
                 // connection status
                 self.ctype = if let Some(ct) = res.head().ctype {
                     if ct == ConnectionType::KeepAlive {
diff --git a/tests/test_server.rs b/tests/test_server.rs
index 16c65aac1..a153e584d 100644
--- a/tests/test_server.rs
+++ b/tests/test_server.rs
@@ -137,7 +137,7 @@ fn test_keepalive_http10_default_close() {
     let _ = stream.write_all(b"GET /test/tests/test HTTP/1.0\r\n\r\n");
     let mut data = vec![0; 1024];
     let _ = stream.read(&mut data);
-    assert_eq!(&data[..17], b"HTTP/1.1 200 OK\r\n");
+    assert_eq!(&data[..17], b"HTTP/1.0 200 OK\r\n");
 
     let mut data = vec![0; 1024];
     let res = stream.read(&mut data).unwrap();
@@ -157,13 +157,13 @@ fn test_keepalive_http10() {
         .write_all(b"GET /test/tests/test HTTP/1.0\r\nconnection: keep-alive\r\n\r\n");
     let mut data = vec![0; 1024];
     let _ = stream.read(&mut data);
-    assert_eq!(&data[..17], b"HTTP/1.1 200 OK\r\n");
+    assert_eq!(&data[..17], b"HTTP/1.0 200 OK\r\n");
 
     let mut stream = net::TcpStream::connect(srv.addr()).unwrap();
     let _ = stream.write_all(b"GET /test/tests/test HTTP/1.0\r\n\r\n");
     let mut data = vec![0; 1024];
     let _ = stream.read(&mut data);
-    assert_eq!(&data[..17], b"HTTP/1.1 200 OK\r\n");
+    assert_eq!(&data[..17], b"HTTP/1.0 200 OK\r\n");
 
     let mut data = vec![0; 1024];
     let res = stream.read(&mut data).unwrap();