diff --git a/mayavi/__init__.py b/mayavi/__init__.py
index 27c028128..08502380b 100644
--- a/mayavi/__init__.py
+++ b/mayavi/__init__.py
@@ -18,7 +18,8 @@
     'traitsui>=7.0.0',
     'packaging',
     'importlib_resources; python_version<"3.11"',
-    'vtk'
+    'vtk',
+    'puremagic'
 ]
 
 __extras_require__ = {
diff --git a/mayavi/tools/remote/remote_widget.py b/mayavi/tools/remote/remote_widget.py
index ea6498324..213928919 100644
--- a/mayavi/tools/remote/remote_widget.py
+++ b/mayavi/tools/remote/remote_widget.py
@@ -1,4 +1,4 @@
-import imghdr
+import puremagic
 
 
 class RemoteWidget(object):
@@ -50,7 +50,7 @@ def show_image(self, data, format='PNG'):
 
     def _update_image(self):
         data = self.scene_proxy.get_raw_image()
-        format = imghdr.what('', h=data)
+        format = puremagic.what('', h=data)
         self.show_image(data, format=format.upper())
 
     # ##### VTK Event handling ##########