diff --git a/test/congruence.py b/test/congruence.py
index f349cd5..6f69827 100755
--- a/test/congruence.py
+++ b/test/congruence.py
@@ -27,7 +27,26 @@ def check_value(dfrow, colname, shouldbe):
 import controller as C
 
 with tarfile.open(os.path.join(repo_path, "test/congruence.tar.xz")) as fid:
-  fid.extractall(os.path.join(repo_path, "test/scratch"))
+  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(fid, os.path.join(repo_path,"test/scratch"))
 
 dummydatadir = os.path.join(repo_path, "test/scratch/congruence/groundtruth-data/dummy-data")
 for ethogramfile in filter(lambda x: x.endswith("ethogram.log"), os.listdir(dummydatadir)):