diff --git a/setup.py b/setup.py
index c14b97f..6d1bf84 100644
--- a/setup.py
+++ b/setup.py
@@ -42,6 +42,7 @@
         "chemicals>=1.0.0",
         "rdkit>=2022.3",
         "h5netcdf~=1.0",
+        "xarray < 2023.11",
         "xarray-datatree>=0.0.12",
         "dgbowl-schemas>=116",
         "matplotlib>=3.5.0",
diff --git a/src/dgpost/transform/reflection.py b/src/dgpost/transform/reflection.py
index 4f0cf2d..afcea56 100644
--- a/src/dgpost/transform/reflection.py
+++ b/src/dgpost/transform/reflection.py
@@ -114,7 +114,7 @@ def prune_cutoff(
     pi = _find_peak(near, absgamma, freq)
     max_v = absgamma.max()
     min_v = absgamma[pi]
-    norm = absgamma - (min_v / (max_v / min_v))
+    norm = (absgamma - min_v) / (max_v - min_v)
     for l in range(pi - 1):
         li = pi - l
         if norm[li] <= cutoff:
diff --git a/tests/test_realworld/ts1_reflection/ref.table.pkl b/tests/test_realworld/ts1_reflection/ref.table.pkl
index 80e1fac..122b782 100644
Binary files a/tests/test_realworld/ts1_reflection/ref.table.pkl and b/tests/test_realworld/ts1_reflection/ref.table.pkl differ
diff --git a/tests/test_reflection/ref.fit_kajfez_0.pkl b/tests/test_reflection/ref.fit_kajfez_0.pkl
index f4c5094..c4163b5 100644
Binary files a/tests/test_reflection/ref.fit_kajfez_0.pkl and b/tests/test_reflection/ref.fit_kajfez_0.pkl differ
diff --git a/tests/test_reflection/ref.fit_kajfez_1.pkl b/tests/test_reflection/ref.fit_kajfez_1.pkl
index 4d17573..004d792 100644
Binary files a/tests/test_reflection/ref.fit_kajfez_1.pkl and b/tests/test_reflection/ref.fit_kajfez_1.pkl differ
diff --git a/tests/test_reflection/ref.prune_cutoff.pkl b/tests/test_reflection/ref.prune_cutoff.pkl
index 4bd758d..d1693ad 100644
Binary files a/tests/test_reflection/ref.prune_cutoff.pkl and b/tests/test_reflection/ref.prune_cutoff.pkl differ