diff --git a/src/slic3r/GUI/NetworkPluginDialog.cpp b/src/slic3r/GUI/NetworkPluginDialog.cpp
index d018af47ba..bc898d0d24 100644
--- a/src/slic3r/GUI/NetworkPluginDialog.cpp
+++ b/src/slic3r/GUI/NetworkPluginDialog.cpp
@@ -47,6 +47,7 @@ NetworkPluginDownloadDialog::NetworkPluginDownloadDialog(wxWindow* parent, Mode
     } else {
         create_missing_plugin_ui();
     }
+    main_sizer->SetSizeHints(this);
     Layout();
     Fit();
     CentreOnParent();
diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index feecdfa163..c9812bad05 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -15094,7 +15094,7 @@ ProjectDropDialog::ProjectDropDialog(const std::string &filename)
 
     m_sizer_main->Add(dlg_btns, 0, wxEXPAND);
 
-    SetSizer(m_sizer_main);
+    SetSizerAndFit(m_sizer_main);
     Layout();
     Fit();
     Centre(wxBOTH);