diff --git a/package/src/pyaslreport/converters/dicom_to_nifti_converter.py b/package/src/pyaslreport/converters/dicom_to_nifti_converter.py
index 3b8242b9..2c6c9fd1 100644
--- a/package/src/pyaslreport/converters/dicom_to_nifti_converter.py
+++ b/package/src/pyaslreport/converters/dicom_to_nifti_converter.py
@@ -12,7 +12,7 @@ class DICOM2NiFTIConverter:
     """
 
     @staticmethod
-    def convert(dcm_files, nifti_file=None, converted_files_location="/tmp/upload"):
+    def convert(dcm_files, nifti_file=None, converted_files_location=None):
 
         """
         Convert DICOM files to NIfTI format.
@@ -22,6 +22,8 @@ def convert(dcm_files, nifti_file=None, converted_files_location="/tmp/upload"):
         nifti_file_assigned = nifti_file
         processed_series = set()
         series_repetitions = {}
+        if converted_files_location is None:
+            converted_files_location = os.path.join(tempfile.gettempdir(), "upload")
 
         with tempfile.TemporaryDirectory() as temp_dir:
             for dcm_file in dcm_files:
diff --git a/package/src/pyaslreport/core/config.py b/package/src/pyaslreport/core/config.py
index 11e4159c..3f0953df 100644
--- a/package/src/pyaslreport/core/config.py
+++ b/package/src/pyaslreport/core/config.py
@@ -1,4 +1,5 @@
 import os
+import tempfile
 
 from pyaslreport.io.readers.yaml_reader import YamlReader
 
@@ -51,13 +52,26 @@ def load(self) -> dict:
         """
         allowed_file_types = YamlReader.read(self.allowed_file_types_path)
         schemas = self._load_schemas()
+        paths = self._normalize_temp_paths(allowed_file_types['paths'])
 
         return {
             'allowed_file_type': allowed_file_types['allowed_file_types'],
-            'paths': allowed_file_types['paths'],
+            'paths': paths,
             'schemas': schemas
         }
 
+    def _normalize_temp_paths(self, paths: dict) -> dict:
+        normalized_paths = {}
+        temp_dir = tempfile.gettempdir()
+
+        for key, path in paths.items():
+            if isinstance(path, str) and path.startswith("/tmp/"):
+                normalized_paths[key] = os.path.join(temp_dir, path.removeprefix("/tmp/"))
+            else:
+                normalized_paths[key] = path
+
+        return normalized_paths
+
 
 # Global config instance
 CONFIG_DIR = os.path.join(os.path.dirname(__file__), 'config')
diff --git a/package/src/pyaslreport/tests/test_temp_path_normalization.py b/package/src/pyaslreport/tests/test_temp_path_normalization.py
new file mode 100644
index 00000000..c5eb5be1
--- /dev/null
+++ b/package/src/pyaslreport/tests/test_temp_path_normalization.py
@@ -0,0 +1,25 @@
+import os
+import tempfile
+
+from pyaslreport.core.config import Config
+from pyaslreport.converters.dicom_to_nifti_converter import DICOM2NiFTIConverter
+
+
+def test_config_normalizes_tmp_paths_to_platform_temp_dir():
+    config_loader = Config("/tmp/does-not-matter")
+    paths = {
+        "upload_folder": "/tmp/upload",
+        "basic_report": "/tmp/basic_report.txt",
+        "json_report": "backend/tests/test_data/expected_response.json",
+    }
+
+    normalized = config_loader._normalize_temp_paths(paths)
+
+    assert normalized["upload_folder"] == os.path.join(tempfile.gettempdir(), "upload")
+    assert normalized["basic_report"] == os.path.join(tempfile.gettempdir(), "basic_report.txt")
+    assert normalized["json_report"] == "backend/tests/test_data/expected_response.json"
+
+
+def test_converter_uses_platform_temp_dir_default():
+    converted_files_location = DICOM2NiFTIConverter.convert.__defaults__[0]
+    assert converted_files_location is None