diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cdd6baf..8bb9108 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
     name: Check Manifest
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
           python-version: "3.x"
@@ -35,7 +35,7 @@ jobs:
         with:
           access_token: ${{ github.token }}
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v4
@@ -63,7 +63,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Set up Python
         uses: actions/setup-python@v4
@@ -96,7 +96,7 @@ jobs:
   #   concurrency: release
 
   #   steps:
-  #   - uses: actions/checkout@v3
+  #   - uses: actions/checkout@v4
   #     with:
   #       fetch-depth: 0
 
diff --git a/.github/workflows/cron.yml b/.github/workflows/cron.yml
index 773fb4c..cb6725b 100644
--- a/.github/workflows/cron.yml
+++ b/.github/workflows/cron.yml
@@ -20,7 +20,7 @@ jobs:
         platform: [ubuntu-latest, macos-latest, windows-latest]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v4
diff --git a/src/raman_analysis/loading.py b/src/raman_analysis/loading.py
index 4b454f4..21db8a5 100644
--- a/src/raman_analysis/loading.py
+++ b/src/raman_analysis/loading.py
@@ -5,7 +5,9 @@
 import xarray as xr
 
 
-def ds2df(ds: xr.Dataset, fov: int, cell_index_start: int = 0, filename=None) -> pd.DataFrame:
+def ds2df(
+    ds: xr.Dataset, fov: int, cell_index_start: int = 0, filename=None
+) -> pd.DataFrame:
     """
     Convert a single dataset into a dataframe.
 
@@ -53,8 +55,6 @@ def ds2df(ds: xr.Dataset, fov: int, cell_index_start: int = 0, filename=None) ->
     return df
 
 
-
-
 def glob2df(
     files: Union[Iterable[str], str],
     conditions,
@@ -64,6 +64,106 @@ def glob2df(
     verbose: bool = True,
 ) -> pd.DataFrame:
     """
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     Parameters
     ----------
     files : iterable, str