diff --git a/pendu.c b/pendu.c
index 1b0cfd6..4586fda 100644
--- a/pendu.c
+++ b/pendu.c
@@ -1,7 +1,9 @@
+#include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
+#include <unistd.h>
 
 #define MAX_WORDS 14
 #define MAX_TRIES 6
@@ -35,6 +37,15 @@ void display_hangman(int tries) {
     }
 }
 
+/* this function display time out when user does nothing during 30s and verify signal*/
+void sig_handler(int signum){
+    if (signum == SIGALRM){
+
+        printf("\ntime out\n");
+        exit (1);
+    }
+}
+
 int main() {
     srand(time(NULL));
     const char *word = words[rand() % MAX_WORDS];
@@ -43,16 +54,21 @@ int main() {
     int tries = 0;
     int guessed_correctly = 0;
 
+    signal(SIGALRM,sig_handler);
+
     for (int i = 0; i < word_length; i++) {
         guessed[i] = '_';
     }
     guessed[word_length] = '\0';
 
     while (tries < MAX_TRIES && guessed_correctly < word_length) {
+
         printf("\nMot à deviner : %s\n", guessed);
         display_hangman(tries);
         char guess;
+        alarm(30);
         printf("Entrez une lettre : ");
+        alarm(30);
         scanf(" %c", &guess);
         int found = 0;