diff --git a/src/revpi_middleware/dbus_middleware1/system_config/revpi_config.py b/src/revpi_middleware/dbus_middleware1/system_config/revpi_config.py
index 3e2fb29..b61ae20 100644
--- a/src/revpi_middleware/dbus_middleware1/system_config/revpi_config.py
+++ b/src/revpi_middleware/dbus_middleware1/system_config/revpi_config.py
@@ -10,6 +10,7 @@ from glob import glob
 from logging import getLogger
 from os import X_OK, access
 from os.path import exists, join
+from threading import Lock
 from typing import List, Optional
 
 from pydbus import SystemBus
@@ -24,6 +25,7 @@ ConfigVariable = namedtuple("ConfigVariable", ["name", "value", "line_index"])
 LINUX_BT_CLASS_PATH = "/sys/class/bluetooth"
 LINUX_WLAN_CLASS_PATH = "/sys/class/ieee80211"
 CONFIG_TXT_LOCATIONS = ("/boot/firmware/config.txt", "/boot/config.txt")
+CONFIG_TXT_LOCK = Lock()
 
 
 class ComputeModuleTypes(IntEnum):
@@ -228,11 +230,6 @@ class ConfigTxt:
     to manipulate specific parameters within the configuration and supports
     managing dtoverlay and dtparam entries. The primary aim of this class
     is to abstract file operations and make modifications user-friendly.
-
-    Attributes:
-        _config_txt_path (str): The path to the configuration file `config.txt`.
-        _config_txt_lines (list[str]): Contains all lines of the configuration
-            file as a list of strings, where each string represents a line.
     """
 
     re_name_value = re.compile(r"^\s*(?!#)(?P<name>[^=\s].+?)\s*=\s*(?P<value>\S+)\s*$")
@@ -318,8 +315,9 @@ class ConfigTxt:
         Returns:
             None
         """
-        with open(self._config_txt_path, "r") as f:
-            self._config_txt_lines = f.readlines()
+        with CONFIG_TXT_LOCK:
+            with open(self._config_txt_path, "r") as f:
+                self._config_txt_lines = f.readlines()
 
     def save_config(self):
         """
@@ -333,10 +331,11 @@ class ConfigTxt:
         if not self._config_txt_lines:
             return
 
-        tmp_path = f"{self._config_txt_path}.tmp"
-        with open(tmp_path, "w") as f:
-            f.writelines(self._config_txt_lines)
-        shutil.move(tmp_path, self._config_txt_path)
+        with CONFIG_TXT_LOCK:
+            tmp_path = f"{self._config_txt_path}.tmp"
+            with open(tmp_path, "w") as f:
+                f.writelines(self._config_txt_lines)
+            shutil.move(tmp_path, self._config_txt_path)
 
         self._config_txt_lines.clear()