diff --git a/pyproject.toml b/pyproject.toml
index 1060f2b..0956ff5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,14 +57,14 @@ sigmon = [
     "pygraphviz>=1.14",
     "typer>=0.15.1",
     "ezmsg-qt>=0.2.1",
-    "phosphor>=0.9.1",
+    "phosphor>=0.11.0",
     "pandas",
 ]
 viewer = [
     "PySide6>=6.7",
     "typer>=0.15.1",
     "ezmsg-qt>=0.2.1",
-    "phosphor>=0.9.1",
+    "phosphor>=0.11.0",
 ]
 
 [project.scripts]
diff --git a/src/ezmsg/tools/plot/shmem_sweep.py b/src/ezmsg/tools/plot/shmem_sweep.py
index c4b2645..943ecb7 100644
--- a/src/ezmsg/tools/plot/shmem_sweep.py
+++ b/src/ezmsg/tools/plot/shmem_sweep.py
@@ -249,6 +249,8 @@ def _apply_shape(self, shape: StreamShape) -> None:
         else:
             self._sweep.update_config(self._config_for(shape))
             self._sweep.set_channel_labels(self._labels_for(shape))
+            if self._controls is not None:
+                self._controls.set_amplitude_unit(shape.unit)
 
     def _labels_for(self, shape: StreamShape) -> list[str]:
         labels = shape.channel_labels
@@ -306,5 +308,6 @@ def _build(self, shape: StreamShape) -> None:
         self._sweep.set_channel_labels_visible(True)
         if self._show_controls:
             self._controls = ChannelPlotControlsWidget(self._sweep, parent=self)
+            self._controls.set_amplitude_unit(shape.unit)
             self._layout.addWidget(self._controls)
         self.on_plot_built()