diff --git a/lotus/sem_ops/sem_agg.py b/lotus/sem_ops/sem_agg.py
index d5003d0..3362000 100644
--- a/lotus/sem_ops/sem_agg.py
+++ b/lotus/sem_ops/sem_agg.py
@@ -1,4 +1,3 @@
-import os
 from typing import Any
 
 import pandas as pd
@@ -8,11 +7,6 @@
 from lotus.types import LMOutput, SemanticAggOutput
 
 
-def initializer(settings, log_level):
-    lotus.logger.setLevel(log_level)
-    lotus.settings.clone(settings)
-
-
 def sem_agg(
     docs: list[str],
     model: lotus.models.LM,
@@ -151,7 +145,6 @@ def _validate(obj: Any) -> None:
 
     @staticmethod
     def process_group(args):
-        lotus.logger.debug(f"Processing in PID: {os.getpid()}")
         group, user_instruction, all_cols, suffix, progress_bar_desc = args
         return group.sem_agg(user_instruction, all_cols, suffix, None, progress_bar_desc=progress_bar_desc)
 
@@ -196,15 +189,10 @@ def __call__(
         if group_by:
             grouped = self._obj.groupby(group_by)
             group_args = [(group, user_instruction, all_cols, suffix, progress_bar_desc) for _, group in grouped]
-            if lotus.settings.enable_multithreading:
-                lotus.logger.debug("Using multithreading")
-                from multiprocessing import Pool
+            from concurrent.futures import ThreadPoolExecutor
 
-                with Pool(initializer=initializer, initargs=(lotus.settings, lotus.logger.getEffectiveLevel())) as pool:
-                    return pd.concat(pool.map(SemAggDataframe.process_group, group_args))
-            else:
-                lotus.logger.debug("Not using multithreading")
-                return pd.concat([SemAggDataframe.process_group(group_arg) for group_arg in group_args])
+            with ThreadPoolExecutor() as executor:
+                return pd.concat(list(executor.map(SemAggDataframe.process_group, group_args)))
 
         # Sort df by partition_id if it exists
         if "_lotus_partition_id" in self._obj.columns:
diff --git a/lotus/sem_ops/sem_topk.py b/lotus/sem_ops/sem_topk.py
index 937d3da..2e2e918 100644
--- a/lotus/sem_ops/sem_topk.py
+++ b/lotus/sem_ops/sem_topk.py
@@ -12,11 +12,6 @@
 from lotus.utils import show_safe_mode
 
 
-def initializer(settings, log_level):
-    lotus.logger.setLevel(log_level)
-    lotus.settings.clone(settings)
-
-
 def get_match_prompt_binary(
     doc1: dict[str, Any], doc2: dict[str, Any], user_instruction: str, strategy: str | None = None
 ) -> list[dict[str, Any]]:
@@ -438,13 +433,10 @@ def __call__(
                 (group, user_instruction, K, method, strategy, None, cascade_threshold, return_stats)
                 for _, group in grouped
             ]
-            if lotus.settings.enable_multithreading:
-                from multiprocessing import Pool
+            from concurrent.futures import ThreadPoolExecutor
 
-                with Pool(initializer=initializer, initargs=(lotus.settings, lotus.logger.getEffectiveLevel())) as pool:
-                    results = pool.map(SemTopKDataframe.process_group, group_args)
-            else:
-                results = [SemTopKDataframe.process_group(group_arg) for group_arg in group_args]
+            with ThreadPoolExecutor() as executor:
+                results = list(executor.map(SemTopKDataframe.process_group, group_args))
 
             new_df = pd.concat([res[0] for res in results])
             stats = {name: res[1] for name, res in zip(grouped.groups.keys(), results)}
diff --git a/lotus/settings.py b/lotus/settings.py
index 3fe3250..1841df6 100644
--- a/lotus/settings.py
+++ b/lotus/settings.py
@@ -17,19 +17,12 @@ class Settings:
     # Serialization setting
     serialization_format: SerializationFormat = SerializationFormat.DEFAULT
 
-    # Multithreading settings
-    enable_multithreading: bool = False
-
     def configure(self, **kwargs):
         for key, value in kwargs.items():
             if not hasattr(self, key):
                 raise ValueError(f"Invalid setting: {key}")
             setattr(self, key, value)
 
-    def clone(self, other_settings):
-        for key in vars(other_settings):
-            setattr(self, key, getattr(other_settings, key))
-
     def __str__(self):
         return str(vars(self))
 
diff --git a/tests/test_settings.py b/tests/test_settings.py
index a578b3c..dc6f871 100644
--- a/tests/test_settings.py
+++ b/tests/test_settings.py
@@ -1,6 +1,5 @@
 import pytest
 
-from lotus.models import LM
 from lotus.settings import SerializationFormat, Settings
 
 
@@ -16,23 +15,11 @@ def test_initial_values(self, settings):
         assert settings.reranker is None
         assert settings.enable_cache is False
         assert settings.serialization_format == SerializationFormat.DEFAULT
-        assert settings.enable_multithreading is False
 
     def test_configure_method(self, settings):
-        settings.configure(enable_multithreading=True)
-        assert settings.enable_multithreading is True
+        settings.configure(enable_cache=True)
+        assert settings.enable_cache is True
 
     def test_invalid_setting(self, settings):
         with pytest.raises(ValueError, match="Invalid setting: invalid_setting"):
             settings.configure(invalid_setting=True)
-
-    def test_clone_method(self, settings):
-        other_settings = Settings()
-        lm = LM(model="test-model")
-        other_settings.lm = lm
-        other_settings.enable_cache = True
-
-        settings.clone(other_settings)
-
-        assert settings.lm == lm
-        assert settings.enable_cache is True