diff --git a/README.md b/README.md
index 17d066c0..10922e5e 100755
--- a/README.md
+++ b/README.md
@@ -193,6 +193,9 @@ We provide a tool namely `bigcodebench.sanitize` to clean up the code:
 bigcodebench.sanitize --samples samples.jsonl --calibrate
 # Sanitized code will be produced to `samples-sanitized-calibrated.jsonl`
 
+# 💡 Optionally run the sanitization step with multiprocessing to speedup
+bigcodebench.sanitize --samples samples.jsonl --calibrate --parallel 8
+
 # 💡 If you want to get the original results:
 bigcodebench.sanitize --samples samples.jsonl
 # Sanitized code will be produced to `samples-sanitized.jsonl`
diff --git a/Requirements/requirements.txt b/Requirements/requirements.txt
index 69d8b6c2..178ae814 100644
--- a/Requirements/requirements.txt
+++ b/Requirements/requirements.txt
@@ -1,9 +1,10 @@
 appdirs>=1.4.4
 fire>=0.6.0
 multipledispatch>=0.6.0
+pqdm>=0.2.0
 tempdir>=0.7.1
 termcolor>=2.0.0
 tqdm>=4.56.0
 tree_sitter_languages>=1.10.2
 tree-sitter==0.21.3
-wget>=3.2
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+wget>=3.2
diff --git a/bigcodebench/sanitize.py b/bigcodebench/sanitize.py
index 6a93f2e0..df9ed4eb 100644
--- a/bigcodebench/sanitize.py
+++ b/bigcodebench/sanitize.py
@@ -3,6 +3,7 @@
 import os
 import pathlib
 from typing import Dict, Generator, List, Optional, Set, Tuple
+from pqdm.processes import pqdm
 
 from tqdm import tqdm
 from tree_sitter import Node
@@ -178,8 +179,48 @@ def sanitize(code: str, entrypoint: Optional[str] = None) -> str:
     return sanitized_output
 
 
+def process_solution(
+    sample_solution: Dict,
+    dataset: Dict,
+    entry_point: Dict,
+    debug_task: str = None,
+    calibrate: bool = False,
+    is_folder: bool = False,
+    target_path: str = None,
+):
+
+    task_id = sample_solution.get("task_id")
+    if not task_id or task_id not in dataset:
+        return None
+
+    dbg_identifier = sample_solution["_identifier"]
+    if debug_task is not None and task_id != debug_task:
+        return None
+
+    function_name = entry_point.get(task_id)
+    old_code = sample_solution.get("solution")
+
+    if old_code is None:
+        assert "completion" in sample_solution, sample_solution
+        old_code = dataset[task_id]["complete_prompt"] + "\n" + sample_solution.get("completion")
+    else:
+        if calibrate:
+            old_code = old_code.replace("```python\n    ", "```python\n"+dataset[task_id]["complete_prompt"]+"    ")
+
+    new_code = sanitize(code=old_code, entrypoint=function_name)
+
+    # if old code and new code are different, print msg
+    if new_code != old_code:
+        msg = "Sanitized: " + dbg_identifier
+        if is_folder:
+            msg += " -> " + dbg_identifier.replace(samples, target_path)
+        print(msg)
+
+    return {"task_id": task_id, "solution": new_code}
+
+
 def script(
-    samples: str, inplace: bool = False, debug_task: str = None, calibrate: bool = False
+    samples: str, inplace: bool = False, debug_task: str = None, calibrate: bool = False, parallel: int=32
 ):
     # task_id -> entry_point
     entry_point = {}
@@ -211,38 +252,26 @@ def script(
 
     new_solutions = []
 
-    for solution in tqdm(load_solutions(samples)):
-        task_id = solution["task_id"]
-        if task_id not in dataset:
-            print(
-                f"Skiping {task_id} as it does not existing in the latest EvalPlus dataset."
-            )
-            continue
-
-        function_name = entry_point[task_id] if task_id in entry_point else None
-        dbg_identifier = solution["_identifier"]
-        if debug_task is not None and task_id != debug_task:
-            continue
-
-        ntotal += 1
-        if "solution" in solution:
-            old_code = solution["solution"]
-            if calibrate:
-                old_code = solution["solution"].replace("```python\n    ", "```python\n"+dataset[task_id]["complete_prompt"]+"    ")
-        else:
-            assert "completion" in solution
-            old_code = dataset[task_id]["complete_prompt"] + "\n" + solution["completion"]
-
-        new_code = sanitize(code=old_code, entrypoint=function_name)
-        # if changed, print the message
-        if new_code != old_code:
-            msg = "Sanitized: " + dbg_identifier
-            if is_folder:
-                msg += " -> " + dbg_identifier.replace(samples, target_path)
-            print(msg)
+    parallel_arg_list = [
+        {
+            "sample_solution": sample_solution,
+            "dataset": dataset,
+            "entry_point": entry_point,
+            "debug_task": debug_task,
+            "calibrate": calibrate,
+            "is_folder": is_folder,
+            "target_path": target_path
+        }
+        for sample_solution in load_solutions(samples)
+    ]
+
+    results = pqdm(parallel_arg_list, process_solution, n_jobs=min(parallel, os.cpu_count()), argument_type="kwargs")
+
+    for result in results:
+        if result is not None:
+            new_solutions.append(result)
             nsan += 1
-
-        new_solutions.append({"task_id": task_id, "solution": new_code})
+        ntotal += 1
 
     if is_folder:
         write_directory(target_path, new_solutions)
@@ -263,4 +292,4 @@ def main():
 
 
 if __name__ == "__main__":
-    main()
+    main()
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