diff --git a/src/pyfabm/__init__.py b/src/pyfabm/__init__.py
index 0337b690..00d265e9 100644
--- a/src/pyfabm/__init__.py
+++ b/src/pyfabm/__init__.py
@@ -23,6 +23,7 @@
 
 # typing.Final not available in Python 3.7
 from typing import Any
+
 try:
     from typing import Final, SupportsIndex
 except ImportError:
@@ -42,7 +43,6 @@
     sys.exit(1)
 import numpy.typing as npt
 
-
 LOG_CALLBACK = ctypes.CFUNCTYPE(None, ctypes.c_char_p)
 
 
@@ -1068,7 +1068,7 @@ def __init__(self, model: "Model", name: str):
 class Model(object):
     def __init__(
         self,
-        path: Union[str, dict] = "fabm.yaml",
+        path: Union[str, dict, os.PathLike] = "fabm.yaml",
         shape: Tuple[int, ...] = (),
         libname: Optional[str] = None,
         start: Optional[Tuple[int, ...]] = None,
@@ -1095,6 +1095,8 @@ def _none_representer(self: Dumper, _: None) -> Any:
                     yaml.dump(path, wrapper, Dumper=Dumper)
                 path = f.name
             delete = True
+        else:
+            path = os.fspath(path)
 
         if libname is None:
             # Pick one of the built-in FABM libraries (0D or 1D)
@@ -1292,9 +1294,11 @@ def setCellThickness(self, value: npt.ArrayLike):
     def getSubModel(self, name: str) -> SubModel:
         return SubModel(self, name)
 
-    def save_settings(self, path: str, display: int = DISPLAY_NORMAL):
+    def save_settings(
+        self, path: Union[str, os.PathLike], display: int = DISPLAY_NORMAL
+    ):
         """Write model configuration to yaml file"""
-        self.fabm.save_settings(self.pmodel, path.encode("ascii"), display)
+        self.fabm.save_settings(self.pmodel, os.fspath(path).encode("ascii"), display)
 
     def _save_state(self) -> Tuple[Mapping[str, np.ndarray], Mapping[str, np.ndarray]]:
         environment = {}
diff --git a/src/pyfabm/complete_yaml.py b/src/pyfabm/complete_yaml.py
index b9e142a0..eab5f054 100644
--- a/src/pyfabm/complete_yaml.py
+++ b/src/pyfabm/complete_yaml.py
@@ -1,9 +1,12 @@
+from typing import Union
+import os
+
 import pyfabm
 
 
 def processFile(
-    infile: str,
-    outfile: str,
+    infile: Union[str, os.PathLike],
+    outfile: Union[str, os.PathLike],
     subtract_background: bool = False,
     add_missing: bool = False,
 ):
diff --git a/src/pyfabm/utils/fabm_complete_yaml.py b/src/pyfabm/utils/fabm_complete_yaml.py
index 266e1a36..2f96db2d 100755
--- a/src/pyfabm/utils/fabm_complete_yaml.py
+++ b/src/pyfabm/utils/fabm_complete_yaml.py
@@ -7,6 +7,7 @@
 """
 
 import sys
+from pathlib import Path
 
 try:
     import pyfabm.complete_yaml
@@ -21,6 +22,7 @@ def main() -> None:
     parser = argparse.ArgumentParser(description=__doc__)
     parser.add_argument(
         "path",
+        type=Path,
         help=(
             "Path to a YAML file with the model configuration that needs to"
             " be completed."
@@ -28,6 +30,7 @@ def main() -> None:
     )
     parser.add_argument(
         "output_path",
+        type=Path,
         help=(
             "Path to save the completed YAML file to. If not provided,"
             " this defaults to the file from which the model configuration is read."
diff --git a/src/pyfabm/utils/fabm_configuration_gui.py b/src/pyfabm/utils/fabm_configuration_gui.py
index 3fe5085f..c4eaeb89 100755
--- a/src/pyfabm/utils/fabm_configuration_gui.py
+++ b/src/pyfabm/utils/fabm_configuration_gui.py
@@ -5,6 +5,7 @@
 """
 
 import sys
+from pathlib import Path
 
 try:
     import pyfabm
@@ -26,7 +27,8 @@ def main() -> None:
         "path",
         help="Path to a YAML file with the model configuration",
         nargs="?",
-        default="fabm.yaml",
+        type=Path,
+        default=Path("fabm.yaml"),
     )
     args = parser.parse_args()
 
diff --git a/src/pyfabm/utils/fabm_describe_model.py b/src/pyfabm/utils/fabm_describe_model.py
index b42e5320..b694b6c8 100755
--- a/src/pyfabm/utils/fabm_describe_model.py
+++ b/src/pyfabm/utils/fabm_describe_model.py
@@ -6,6 +6,7 @@
 """
 
 import sys
+from pathlib import Path
 
 try:
     import pyfabm
@@ -22,7 +23,8 @@ def main() -> None:
         "path",
         help="Path to a YAML file with the model configuration",
         nargs="?",
-        default="fabm.yaml",
+        type=Path,
+        default=Path("fabm.yaml"),
     )
     parser.add_argument(
         "--all",