diff --git a/nxc/connection.py b/nxc/connection.py
index f20d05dda..76a1392ee 100755
--- a/nxc/connection.py
+++ b/nxc/connection.py
@@ -1,5 +1,6 @@
 from datetime import datetime
 import os
+import re
 import random
 import sys
 import contextlib
@@ -245,6 +246,10 @@ def proto_flow(self):
         else:
             self.logger.debug("Created connection object")
             self.enum_host_info()
+            sanitized = re.sub(r'[^\w\-.]', '_', self.hostname)
+            if sanitized != self.hostname:
+                self.logger.display(f"Hostname contains invalid characters (received: {self.hostname!r}), sanitized to: {sanitized!r}")
+                self.hostname = sanitized
 
             # Construct the output file template using os.path.join for OS compatibility
             base_log_dir = os.path.join(NXC_PATH, "logs")