diff --git a/milp-evolve/src/milp_evolve_llm/src/prefix_gen.py b/milp-evolve/src/milp_evolve_llm/src/prefix_gen.py
index 002e98c..65f03ee 100644
--- a/milp-evolve/src/milp_evolve_llm/src/prefix_gen.py
+++ b/milp-evolve/src/milp_evolve_llm/src/prefix_gen.py
@@ -47,7 +47,7 @@ def gen_topic_prefix(path=topic_path):
 
         import tarfile
         with tarfile.open(os.path.join(path, "prefix_prompts.json.tar.gz"), "r:gz") as tar:
-            tar.extractall(path)
+            tar.extractall(path, filter="data"))
     
     topic_info = json.load(open(os.path.join(path, "prefix_prompts.json"), "r"))  
     topic_info = topic_info[-5000:]
@@ -56,4 +56,4 @@ def gen_topic_prefix(path=topic_path):
         if "#Given Prompt#:" in topic["text"]:
             yield topic["text"].split("#Given Prompt#:")[1].strip()
         else:
-            yield topic["text"].strip()
\ No newline at end of file
+            yield topic["text"].strip()