diff --git a/README.md b/README.md
index 9c07651..cfe3272 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,7 @@ Start server on localhost using the commands below.
 ```bash
 chmod +x simple-dict-server simple-dict-client
 Usage:
-./simple-dict-server [-d] listen_port dict_file [config_file | -]
+./simple-dict-server [-d] listen_port dict_file [ config_file | - ]
         -d: As daemon
         - : Read config from env SDS_PWD & SDS_SPS
 ```
@@ -41,7 +41,7 @@ Open another shell to connect to it.
 ```bash
 ./simple-dict-client 127.0.0.1 7777
 ```
-Now you have connected to the server. The default access passwords is in `client.c` and you can modify the password in source code as you like. Please note that the server will only wait `4` seconds for a response after the last communication. The box below shows how to control the server to accompilsh basic add/del/find/edit operations.
+Now you have connected to the server. The default access passwords is in `client.c` and you can modify the password in source code as you like. Please note that the server will only wait `4` seconds for a response after the last communication. You can go to `server.h` to edit this limit. The box below shows how to control the server to accompilsh basic add/del/find/edit operations.
 
 |  cmd  |  data  |  description  |  reply  |
 |  ----  | ----  | ----  | ----- |
diff --git a/server.c b/server.c
index 0755ac1..db39fb5 100644
--- a/server.c
+++ b/server.c
@@ -330,6 +330,7 @@ ERR_INSERT_ITEM:
 }
 
 static int s3_set_data(thread_timer_t *timer) {
+    if(!setdicts[timer->index].data[0]) return send_data(timer->accept_fd, timer->index, ACKERRO, "erro", 4);
     FILE *fp = open_ex_dict();
     if(fp == NULL) return send_data(timer->accept_fd, timer->index, ACKERRO, "erro", 4);
 
@@ -378,6 +379,8 @@ static int s3_set_data(thread_timer_t *timer) {
         r = send_data(timer->accept_fd, timer->index,  ACKSUCC, "succ", 4);
     }
 
+    setdicts[timer->index].data[0] = 0;
+
     pthread_cleanup_pop(1);
     return r;
 }
@@ -523,6 +526,7 @@ static void cleanup_thread(thread_timer_t* timer) {
     pthread_sigmask(SIG_BLOCK, &mask, NULL);
     puts("Start cleaning");
     timer->thread = 0;
+    setdicts[timer->index].data[0] = 0;
     if(timer->accept_fd) {
         close(timer->accept_fd);
         timer->accept_fd = 0;