diff --git a/README.md b/README.md
index 4faba3b..7ee759c 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ dymanic ELF binary is 18Kb, static (gcc -Wall -g --static   -o zombie zombie.c)
 You can find statically compiled binary in Releases page.
 
 ## Usage:
-Accepts one argument (int), sleep time. Default value is 30.
+Accepts one argument (int), sleep time. Default value is 0 (sleep forever).
 
 ~~~
 $ ./zombie 50
diff --git a/zombie.c b/zombie.c
index c77ca61..6718833 100644
--- a/zombie.c
+++ b/zombie.c
@@ -3,25 +3,32 @@
 #include <unistd.h>
 #include <sys/types.h>
 
-char *version = "0.0.1";
+char *version = "0.0.2";
 
 int main(int argc, char **argv) {
     pid_t pid = fork();  // Create a new child process
 
-    int sleeptime = 30;
+    int sleeptime = -1;
 
     if(argc > 1){
         sleeptime = atoi(argv[1]);
     }
 
     if(sleeptime == 0){
-        sleeptime = 30;
+        sleeptime = -1;
     }
 
     if (pid > 0) {
         // Parent process: Just sleep, don't call wait().
         printf("Parent process (PID: %d) is running, child (PID: %d) will become a zombie.\n", getpid(), pid);
-        printf("Sleep %d seconds...\n", sleeptime);
+        if(sleeptime>0){
+            printf("Sleep %d seconds...\n", sleeptime);
+        }else{
+            printf("Sleep forever...\n");
+            while(1){
+                sleep(86400);
+            }
+        }
         sleep(sleeptime);  // Keep the parent alive to allow time for observing the zombie process
     } else if (pid == 0) {
         // Child process: Exit immediately, becomes a zombie