diff --git a/src/sshare/cli.py b/src/sshare/cli.py
index 135a263..87af8be 100644
--- a/src/sshare/cli.py
+++ b/src/sshare/cli.py
@@ -71,6 +71,23 @@ class Config:
         with open(config_path, mode="rb") as file:
             return tomllib.load(file)
 
+
+def rebase(number):
+    if number == 0:
+        return "0"
+    rebased = ""
+    while number != 0:
+        digit = number % 62
+        if digit < 10:
+            rebased = chr(digit + 48) + rebased
+        elif digit < 36:
+            rebased = chr(digit + 87) + rebased
+        else:
+            rebased = chr(digit + 29) + rebased
+        number = int(number / 62)
+    return rebased
+
+
 def main():
     arguments = parse_arguments()
 
@@ -101,7 +118,7 @@ def main():
         print("Error: must specify one of -f FILE, -l, -p")
         sys.exit(1)
        
-    target_id = time.time_ns()
+    target_id = rebase(time.time_ns())
     target_file_name = f"{target_id}{target_file_extension}"
     target_file = f"{config.ssh_path}/{target_file_name}"
     target_destination = f"{config.ssh_user}@{config.host_name}"