diff --git a/src/spyglass/spikesorting/merge.py b/src/spyglass/spikesorting/merge.py
index 21683a3a1..bfbe75cac 100644
--- a/src/spyglass/spikesorting/merge.py
+++ b/src/spyglass/spikesorting/merge.py
@@ -121,7 +121,7 @@ class UnitSelection(SpyglassMixin, dj.Manual):
     definition = """
     # Units to be selected for downstream analysis
     -> SpikeSortingOutput
-    unit_group_name : varchar(30)
+    unit_group_name : varchar(40)
     ---
     unit_group : blob
     """