diff --git a/HPC/prep.py b/HPC/prep.py
index 1174047..1639d35 100644
--- a/HPC/prep.py
+++ b/HPC/prep.py
@@ -63,7 +63,26 @@ def flights(small=None):
         print("- Extracting flight data... ", end='', flush=True)
         tar_path = os.path.join(data_dir, 'nycflights.tar.gz')
         with tarfile.open(tar_path, mode='r:gz') as flights:
-            flights.extractall('data/')
+            def is_within_directory(directory, target):
+                
+                abs_directory = os.path.abspath(directory)
+                abs_target = os.path.abspath(target)
+            
+                prefix = os.path.commonprefix([abs_directory, abs_target])
+                
+                return prefix == abs_directory
+            
+            def safe_extract(tar, path=".", members=None, *, numeric_owner=False):
+            
+                for member in tar.getmembers():
+                    member_path = os.path.join(path, member.name)
+                    if not is_within_directory(path, member_path):
+                        raise Exception("Attempted Path Traversal in Tar File")
+            
+                tar.extractall(path, members, numeric_owner=numeric_owner) 
+                
+            
+            safe_extract(flights, "data/")
 
         if small:
             for path in glob(os.path.join(data_dir, "nycflights", "*.csv")):