diff --git a/src/aind_ephys_rig_qc/driftmap.json b/src/aind_ephys_rig_qc/driftmap.json
index fa52b47..77bf8f4 100644
--- a/src/aind_ephys_rig_qc/driftmap.json
+++ b/src/aind_ephys_rig_qc/driftmap.json
@@ -17,5 +17,5 @@
     "vmax": 0,
     "cmap": "Greys_r",
     "figsize": [10, 10],
-    "phase_shift": null
-}
\ No newline at end of file
+    "phase_shift": {"margin_ms": 100.0}
+}