diff --git a/piker/data/_sharedmem.py b/piker/data/_sharedmem.py
index bc1ded75..bd40ad7e 100644
--- a/piker/data/_sharedmem.py
+++ b/piker/data/_sharedmem.py
@@ -271,7 +271,7 @@ class ShmArray:
 
         # type that all field values will be cast to
         # in the returned view.
-        common_dtype: np.dtype = np.float,
+        common_dtype: np.dtype = float,
 
     ) -> np.ndarray:
 
diff --git a/piker/ui/_interaction.py b/piker/ui/_interaction.py
index b4a78931..1219e94e 100644
--- a/piker/ui/_interaction.py
+++ b/piker/ui/_interaction.py
@@ -620,7 +620,7 @@ class ChartView(ViewBox):
         # Ignore axes if mouse is disabled
         mouseEnabled = np.array(
             self.state['mouseEnabled'],
-            dtype=np.float,
+            dtype=float,
         )
         mask = mouseEnabled.copy()
         if axis is not None: