diff --git a/src/main/scala/ocelot/desktop/OcelotDesktop.scala b/src/main/scala/ocelot/desktop/OcelotDesktop.scala
index 255f077..0bb9a6f 100644
--- a/src/main/scala/ocelot/desktop/OcelotDesktop.scala
+++ b/src/main/scala/ocelot/desktop/OcelotDesktop.scala
@@ -404,13 +404,16 @@ object OcelotDesktop
       val selectedFile =
         Option.when(chooser.showDialog(null, null) == JFileChooser.APPROVE_OPTION)(chooser.getSelectedFile)
 
-      val result = f(selectedFile)
-
-      result match {
-        case f @ Failure(_) => showFailureMessage(f)
-        case Success(_) =>
-      }
+      // users of [showFileChooserDialog] expect that the continuation is run on the main thread.
+      // let's meet this expectation.
+      UiHandler.UiThreadTasks.add(() => {
+        val result = f(selectedFile)
 
+        result match {
+          case f@Failure(_) => showFailureMessage(f)
+          case Success(_) =>
+        }
+      })
     }).start()
   }