diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7e62a546..74086f63 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,23 +1,28 @@
-# Upcoming (v0.6.0)
+# Upcoming (v0.5.9)
 
-### Back-compatibility break
+### Deprecations
 
-* Remove support for Python 3.8 [PR #325](https://github.com/catalystneuro/roiextractors/pull/325)
+* Remove support for Python 3.8: [PR #325](https://github.com/catalystneuro/roiextractors/pull/325)
 
 ### Features
 
-* Add InscopixImagingExtractor [#276](https://github.com/catalystneuro/roiextractors/pull/276)
+* Add InscopixImagingExtractor: [#276](https://github.com/catalystneuro/roiextractors/pull/276)
 * Updated testing workflows to include python 3.12, m1/intel macos, and dev tests to check neuroconv: [PR #317](https://github.com/catalystneuro/roiextractors/pull/317)
 
 ### Fixes
 
-* Remove unecessary scipy import error handling [#315](https://github.com/catalystneuro/roiextractors/pull/315)
+* Remove unecessary scipy import error handling: [#315](https://github.com/catalystneuro/roiextractors/pull/315)
+
+### Improvements
+- The `Suite2PSegmentationExtractor` now produces an error when a required sub-file is missin: [#330](https://github.com/catalystneuro/roiextractors/pull/330)
 
 ### Testing
 
 * Updated testing workflows to include python 3.12, m1/intel macos, and dev tests to check neuroconv: [PR #317](https://github.com/catalystneuro/roiextractors/pull/317)
 * Added daily testing workflow and fixed bug with python 3.12 by upgrading scanimage-tiff-reader version: [PR #321](https://github.com/catalystneuro/roiextractors/pull/321)
 
+
+
 # v0.5.8
 
 ### Fixes
@@ -29,6 +34,7 @@
 * Updated zenodo to get a DOI on each release: No PR
 
 
+
 # v0.5.7
 
 ### Features
@@ -51,6 +57,8 @@
 
 * Fixed a bug with `ScanImageTiffSinglePlaneImagingExtractor` in which `frames_per_slice` would be set to `_num_frames`: [PR #294](https://github.com/catalystneuro/roiextractors/pull/294)
 
+
+
 # v0.5.6
 
 ### Features
@@ -61,6 +69,8 @@
 
 * Updated documentation and Readme PRs: [#283](https://github.com/catalystneuro/roiextractors/pull/283) [#282](https://github.com/catalystneuro/roiextractors/pull/282) [#280](https://github.com/catalystneuro/roiextractors/pull/280)
 
+
+
 # v0.5.5
 
 ### Features
@@ -73,6 +83,7 @@
 * Fixed override of `channel_name` in `Suite2pSegmentationExtractor`. [PR #263](https://github.com/catalystneuro/roiextractors/pull/263)
 
 
+
 # v0.5.4
 
 ### Features
diff --git a/src/roiextractors/extractors/suite2p/suite2psegmentationextractor.py b/src/roiextractors/extractors/suite2p/suite2psegmentationextractor.py
index cfbd6570..3df8c130 100644
--- a/src/roiextractors/extractors/suite2p/suite2psegmentationextractor.py
+++ b/src/roiextractors/extractors/suite2p/suite2psegmentationextractor.py
@@ -57,7 +57,7 @@ def get_available_planes(cls, folder_path: PathType):
 
         Parameters
         ----------
-        file_path : PathType
+        folder_path : PathType
             Path to Suite2p output path.
 
         Returns
@@ -150,13 +150,13 @@ def __init__(
 
         self.folder_path = Path(folder_path)
 
-        options = self._load_npy(file_name="ops.npy")
-        self.options = options.item() if options is not None else options
+        options = self._load_npy(file_name="ops.npy", require=True)
+        self.options = options.item()
         self._sampling_frequency = self.options["fs"]
         self._num_frames = self.options["nframes"]
         self._image_size = (self.options["Ly"], self.options["Lx"])
 
-        self.stat = self._load_npy(file_name="stat.npy")
+        self.stat = self._load_npy(file_name="stat.npy", require=True)
 
         fluorescence_traces_file_name = "F.npy" if channel_name == "chan1" else "F_chan2.npy"
         neuropil_traces_file_name = "Fneu.npy" if channel_name == "chan1" else "Fneu_chan2.npy"
@@ -187,7 +187,7 @@ def __init__(
             self.get_image_size(),
         )
 
-    def _load_npy(self, file_name: str, mmap_mode=None, transpose: bool = False):
+    def _load_npy(self, file_name: str, mmap_mode=None, transpose: bool = False, require: bool = False):
         """Load a .npy file with specified filename. Returns None if file is missing.
 
         Parameters
@@ -198,6 +198,8 @@ def _load_npy(self, file_name: str, mmap_mode=None, transpose: bool = False):
             The mode to use for memory mapping. See numpy.load for details.
         transpose: bool, optional
             Whether to transpose the loaded array.
+        require: bool, optional
+            Whether to raise an error if the file is missing.
 
         Returns
         -------
@@ -205,6 +207,8 @@ def _load_npy(self, file_name: str, mmap_mode=None, transpose: bool = False):
         """
         file_path = self.folder_path / self.plane_name / file_name
         if not file_path.exists():
+            if require:
+                raise FileNotFoundError(f"File {file_path} not found.")
             return
 
         data = np.load(file_path, mmap_mode=mmap_mode, allow_pickle=mmap_mode is None)