diff --git a/bar/main.py b/bar/main.py
index 20f36cf..0bacb20 100644
--- a/bar/main.py
+++ b/bar/main.py
@@ -33,6 +33,7 @@ dummy = Window(visible=False)
 finder = FuzzyWindowFinder()
 
 bar_windows = []
+notmuch_widget = None
 
 app = Application("bar", dummy, finder)
 
@@ -54,6 +55,7 @@ else:
 
 
 def spawn_bars():
+    global notmuch_widget
     logger.info("[Bar] Spawning bars after river ready")
     outputs = river.outputs
 
@@ -66,6 +68,8 @@ def spawn_bars():
     for i, output_id in enumerate(output_ids):
         bar = StatusBar(display=output_id, tray=tray if i == 0 else None, monitor=i)
         bar_windows.append(bar)
+        if i == 0 and bar.notmuch:
+            notmuch_widget = bar.notmuch
 
     return False
 
diff --git a/flake.nix b/flake.nix
index 7f4b4e3..3b8aa80 100644
--- a/flake.nix
+++ b/flake.nix
@@ -37,6 +37,9 @@
           makku = pkgs.writeShellScriptBin "makku" ''
             dbus-send --session --print-reply --dest=org.Fabric.fabric.bar  /org/Fabric/fabric org.Fabric.fabric.Evaluate string:"finder.show()" > /dev/null 2>&1
           '';
+          notmuch-refresh = pkgs.writeShellScriptBin "notmuch-refresh" ''
+            dbus-send --session --print-reply --dest=org.Fabric.fabric.bar /org/Fabric/fabric org.Fabric.fabric.Evaluate string:"notmuch_widget.service.update_unread_count() if notmuch_widget else None" > /dev/null 2>&1
+          '';
         };
         apps.default = {
           type = "app";