diff --git a/CHANGELOG.md b/CHANGELOG.md
index e5d7d1076..9e8537e8f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -119,7 +119,7 @@
 - Dev: Channels without any animated elements on screen will skip updates from the GIF timer. (#5042, #5043, #5045)
 - Dev: Autogenerate docs/plugin-meta.lua. (#5055)
 - Dev: Refactor `NetworkPrivate`. (#5063)
-- Dev: Refactor `Paths` & `Updates`, focusing on reducing their singletoniability. (#5092)
+- Dev: Refactor `Paths` & `Updates`, focusing on reducing their singletoniability. (#5092, #5102)
 - Dev: Removed duplicate scale in settings dialog. (#5069)
 - Dev: Fix `NotebookTab` emitting updates for every message. (#5068)
 - Dev: Added benchmark for parsing and building recent messages. (#5071)
diff --git a/src/Application.cpp b/src/Application.cpp
index 1890bcf4d..23cfec26f 100644
--- a/src/Application.cpp
+++ b/src/Application.cpp
@@ -305,26 +305,35 @@ int Application::run(QApplication &qtApp)
 
 IEmotes *Application::getEmotes()
 {
+    assertInGuiThread();
+
     return this->emotes;
 }
 
 IUserDataController *Application::getUserData()
 {
+    assertInGuiThread();
+
     return this->userData;
 }
 
 ISoundController *Application::getSound()
 {
+    assertInGuiThread();
+
     return this->sound;
 }
 
 ITwitchLiveController *Application::getTwitchLiveController()
 {
+    assertInGuiThread();
+
     return this->twitchLiveController;
 }
 
 TwitchBadges *Application::getTwitchBadges()
 {
+    assertInGuiThread();
     assert(this->twitchBadges);
 
     return this->twitchBadges.get();
@@ -332,16 +341,22 @@ TwitchBadges *Application::getTwitchBadges()
 
 ITwitchIrcServer *Application::getTwitch()
 {
+    assertInGuiThread();
+
     return this->twitch;
 }
 
 PubSub *Application::getTwitchPubSub()
 {
+    assertInGuiThread();
+
     return this->twitchPubSub.get();
 }
 
 Logging *Application::getChatLogger()
 {
+    assertInGuiThread();
+
     return this->logging.get();
 }
 
@@ -884,8 +899,6 @@ Application *getApp()
 {
     assert(Application::instance != nullptr);
 
-    assertInGuiThread();
-
     return Application::instance;
 }
 
@@ -893,8 +906,6 @@ IApplication *getIApp()
 {
     assert(IApplication::instance != nullptr);
 
-    assertInGuiThread();
-
     return IApplication::instance;
 }
 
diff --git a/src/Application.hpp b/src/Application.hpp
index 2e0d46fc9..176441e8e 100644
--- a/src/Application.hpp
+++ b/src/Application.hpp
@@ -1,12 +1,14 @@
 #pragma once
 
 #include "common/Singleton.hpp"
+#include "debug/AssertInGuiThread.hpp"
 #include "singletons/NativeMessaging.hpp"
 
 #include <pajlada/signals.hpp>
 #include <pajlada/signals/signal.hpp>
 #include <QApplication>
 
+#include <cassert>
 #include <memory>
 
 namespace chatterino {
@@ -161,43 +163,63 @@ public:
     }
     Theme *getThemes() override
     {
+        assertInGuiThread();
+
         return this->themes;
     }
     Fonts *getFonts() override
     {
+        assertInGuiThread();
+
         return this->fonts;
     }
     IEmotes *getEmotes() override;
     AccountController *getAccounts() override
     {
+        assertInGuiThread();
+
         return this->accounts;
     }
     HotkeyController *getHotkeys() override
     {
+        assertInGuiThread();
+
         return this->hotkeys;
     }
     WindowManager *getWindows() override
     {
+        assertInGuiThread();
+
         return this->windows;
     }
     Toasts *getToasts() override
     {
+        assertInGuiThread();
+
         return this->toasts;
     }
     CrashHandler *getCrashHandler() override
     {
+        assertInGuiThread();
+
         return this->crashHandler;
     }
     CommandController *getCommands() override
     {
+        assertInGuiThread();
+
         return this->commands;
     }
     NotificationController *getNotifications() override
     {
+        assertInGuiThread();
+
         return this->notifications;
     }
     HighlightController *getHighlights() override
     {
+        assertInGuiThread();
+
         return this->highlights;
     }
     ITwitchIrcServer *getTwitch() override;
@@ -205,14 +227,20 @@ public:
     Logging *getChatLogger() override;
     ChatterinoBadges *getChatterinoBadges() override
     {
+        assertInGuiThread();
+
         return this->chatterinoBadges;
     }
     FfzBadges *getFfzBadges() override
     {
+        assertInGuiThread();
+
         return this->ffzBadges;
     }
     SeventvBadges *getSeventvBadges() override
     {
+        assertInGuiThread();
+
         return this->seventvBadges;
     }
     IUserDataController *getUserData() override;
@@ -221,14 +249,20 @@ public:
     TwitchBadges *getTwitchBadges() override;
     ImageUploader *getImageUploader() override
     {
+        assertInGuiThread();
+
         return this->imageUploader;
     }
     SeventvAPI *getSeventvAPI() override
     {
+        assertInGuiThread();
+
         return this->seventvAPI;
     }
     Updates &getUpdates() override
     {
+        assertInGuiThread();
+
         return this->updates;
     }