diff --git a/src/common/CompletionModel.cpp b/src/common/CompletionModel.cpp
index 92bda0e83..5f9dfff08 100644
--- a/src/common/CompletionModel.cpp
+++ b/src/common/CompletionModel.cpp
@@ -163,7 +163,7 @@ void CompletionModel::refresh(const QString &prefix)
         }
 
         // Commands
-        for (auto &command : getApp()->commands->items_.getVector())
+        for (auto &command : getApp()->commands->items_)
         {
             addString(command.name, TaggedString::Command);
         }
diff --git a/src/common/SignalVector.hpp b/src/common/SignalVector.hpp
index 262718d0f..db03df265 100644
--- a/src/common/SignalVector.hpp
+++ b/src/common/SignalVector.hpp
@@ -4,6 +4,7 @@
 #include <QTimer>
 #include <boost/noncopyable.hpp>
 #include <pajlada/signals/signal.hpp>
+#include <shared_mutex>
 #include <vector>
 
 #include "debug/AssertInGuiThread.hpp"
@@ -20,7 +21,57 @@ struct SignalVectorItemArgs {
 template <typename TVectorItem>
 class ReadOnlySignalVector : boost::noncopyable
 {
+    using VecIt = typename std::vector<TVectorItem>::iterator;
+
 public:
+    struct Iterator
+        : public std::iterator<std::input_iterator_tag, TVectorItem> {
+        Iterator(VecIt &&it, std::shared_mutex &mutex)
+            : it_(std::move(it))
+            , lock_(mutex)
+            , mutex_(mutex)
+        {
+        }
+
+        Iterator(const Iterator &other)
+            : it_(other.it_)
+            , lock_(other.mutex_)
+            , mutex_(other.mutex_)
+        {
+        }
+
+        TVectorItem &operator*()
+        {
+            return it_.operator*();
+        }
+
+        Iterator &operator++()
+        {
+            ++this->it_;
+            return *this;
+        }
+
+        bool operator==(const Iterator &other)
+        {
+            return this->it_ == other.it_;
+        }
+
+        bool operator!=(const Iterator &other)
+        {
+            return this->it_ != other.it_;
+        }
+
+        auto operator-(const Iterator &other)
+        {
+            return this->it_ - other.it_;
+        }
+
+    private:
+        VecIt it_;
+        std::shared_lock<std::shared_mutex> lock_;
+        std::shared_mutex &mutex_;
+    };
+
     ReadOnlySignalVector()
     {
         QObject::connect(&this->itemsChangedTimer_, &QTimer::timeout,
@@ -34,6 +85,27 @@ public:
     pajlada::Signals::Signal<SignalVectorItemArgs<TVectorItem>> itemRemoved;
     pajlada::Signals::NoArgSignal delayedItemsChanged;
 
+    Iterator begin() const
+    {
+        return Iterator(
+            const_cast<std::vector<TVectorItem> &>(this->vector_).begin(),
+            this->mutex_);
+    }
+
+    Iterator end() const
+    {
+        return Iterator(
+            const_cast<std::vector<TVectorItem> &>(this->vector_).end(),
+            this->mutex_);
+    }
+
+    bool empty() const
+    {
+        std::shared_lock lock(this->mutex_);
+
+        return this->vector_.empty();
+    }
+
     const std::vector<TVectorItem> &getVector() const
     {
         assertInGuiThread();
@@ -56,6 +128,7 @@ public:
 protected:
     std::vector<TVectorItem> vector_;
     QTimer itemsChangedTimer_;
+    mutable std::shared_mutex mutex_;
 };
 
 template <typename TVectorItem>
@@ -69,10 +142,15 @@ public:
     void removeItem(int index, void *caller = nullptr)
     {
         assertInGuiThread();
-        assert(index >= 0 && index < this->vector_.size());
+        std::unique_lock lock(this->mutex_);
+
+        assert(index >= 0 && index < int(this->vector_.size()));
 
         TVectorItem item = this->vector_[index];
+
         this->vector_.erase(this->vector_.begin() + index);
+        lock.unlock();  // manual unlock
+
         SignalVectorItemArgs<TVectorItem> args{item, index, caller};
         this->itemRemoved.invoke(args);
 
@@ -93,16 +171,20 @@ public:
                            void *caller = nullptr) override
     {
         assertInGuiThread();
-        if (index == -1)
-        {
-            index = this->vector_.size();
-        }
-        else
-        {
-            assert(index >= 0 && index <= this->vector_.size());
-        }
 
-        this->vector_.insert(this->vector_.begin() + index, item);
+        {
+            std::unique_lock lock(this->mutex_);
+            if (index == -1)
+            {
+                index = this->vector_.size();
+            }
+            else
+            {
+                assert(index >= 0 && index <= this->vector_.size());
+            }
+
+            this->vector_.insert(this->vector_.begin() + index, item);
+        }
 
         SignalVectorItemArgs<TVectorItem> args{item, index, caller};
         this->itemInserted.invoke(args);
@@ -124,11 +206,16 @@ public:
                            void *caller = nullptr) override
     {
         assertInGuiThread();
+        int index = -1;
 
-        auto it = std::lower_bound(this->vector_.begin(), this->vector_.end(),
-                                   item, Compare{});
-        int index = it - this->vector_.begin();
-        this->vector_.insert(it, item);
+        {
+            std::unique_lock lock(this->mutex_);
+
+            auto it = std::lower_bound(this->vector_.begin(),
+                                       this->vector_.end(), item, Compare{});
+            index = it - this->vector_.begin();
+            this->vector_.insert(it, item);
+        }
 
         SignalVectorItemArgs<TVectorItem> args{item, index, caller};
         this->itemInserted.invoke(args);
diff --git a/src/controllers/accounts/AccountController.cpp b/src/controllers/accounts/AccountController.cpp
index 468f7433e..0d2695b5d 100644
--- a/src/controllers/accounts/AccountController.cpp
+++ b/src/controllers/accounts/AccountController.cpp
@@ -16,7 +16,7 @@ AccountController::AccountController()
     this->twitch.accounts.itemRemoved.connect([this](const auto &args) {
         if (args.caller != this)
         {
-            auto &accs = this->twitch.accounts.getVector();
+            auto &accs = this->twitch.accounts;
             auto it = std::find(accs.begin(), accs.end(), args.item);
             assert(it != accs.end());
 
@@ -29,7 +29,7 @@ AccountController::AccountController()
         {
             case ProviderId::Twitch:
             {
-                auto &accs = this->twitch.accounts.getVector();
+                auto &accs = this->twitch.accounts;
                 auto it = std::find(accs.begin(), accs.end(), args.item);
                 assert(it != accs.end());
 
diff --git a/src/controllers/commands/CommandController.cpp b/src/controllers/commands/CommandController.cpp
index ae46f6e2e..b6fe9b8e8 100644
--- a/src/controllers/commands/CommandController.cpp
+++ b/src/controllers/commands/CommandController.cpp
@@ -174,7 +174,7 @@ void CommandController::initialize(Settings &, Paths &paths)
     auto addFirstMatchToMap = [this](auto args) {
         this->commandsMap_.remove(args.item.name);
 
-        for (const Command &cmd : this->items_.getVector())
+        for (const Command &cmd : this->items_)
         {
             if (cmd.name == args.item.name)
             {
@@ -185,7 +185,7 @@ void CommandController::initialize(Settings &, Paths &paths)
 
         int maxSpaces = 0;
 
-        for (const Command &cmd : this->items_.getVector())
+        for (const Command &cmd : this->items_)
         {
             auto localMaxSpaces = cmd.name.count(' ');
             if (localMaxSpaces > maxSpaces)
diff --git a/src/controllers/highlights/HighlightController.cpp b/src/controllers/highlights/HighlightController.cpp
index 36caa4925..8cad2d7cd 100644
--- a/src/controllers/highlights/HighlightController.cpp
+++ b/src/controllers/highlights/HighlightController.cpp
@@ -64,7 +64,7 @@ UserHighlightModel *HighlightController::createUserModel(QObject *parent)
 
 bool HighlightController::isHighlightedUser(const QString &username)
 {
-    const auto &userItems = this->highlightedUsers.getVector();
+    const auto &userItems = this->highlightedUsers;
     for (const auto &highlightedUser : userItems)
     {
         if (highlightedUser.isMatch(username))
@@ -87,9 +87,7 @@ HighlightBlacklistModel *HighlightController::createBlacklistModel(
 
 bool HighlightController::blacklistContains(const QString &username)
 {
-    std::vector<HighlightBlacklistUser> blacklistItems =
-        this->blacklistedUsers.getVector();
-    for (const auto &blacklistedUser : blacklistItems)
+    for (const auto &blacklistedUser : this->blacklistedUsers)
     {
         if (blacklistedUser.isMatch(username))
         {
diff --git a/src/controllers/ignores/IgnorePhrase.hpp b/src/controllers/ignores/IgnorePhrase.hpp
index 892f8ec39..4eea81f96 100644
--- a/src/controllers/ignores/IgnorePhrase.hpp
+++ b/src/controllers/ignores/IgnorePhrase.hpp
@@ -107,7 +107,7 @@ public:
         if (!this->emotesChecked_)
         {
             const auto &accvec =
-                getApp()->accounts->twitch.accounts.getVector();
+                getApp()->accounts->twitch.accounts;
             for (const auto &acc : accvec)
             {
                 const auto &accemotes = *acc->accessEmotes();
diff --git a/src/controllers/notifications/NotificationController.cpp b/src/controllers/notifications/NotificationController.cpp
index 081084fba..1b3e64143 100644
--- a/src/controllers/notifications/NotificationController.cpp
+++ b/src/controllers/notifications/NotificationController.cpp
@@ -41,7 +41,7 @@ void NotificationController::initialize(Settings &settings, Paths &paths)
 
     this->channelMap[Platform::Mixer].delayedItemsChanged.connect([this] {  //
         this->mixerSetting_.setValue(
-            this->channelMap[Platform::Mixer].getVector());
+            this->channelMap[Platform::Mixer]);
     });*/
 
     liveStatusTimer_ = new QTimer();
@@ -69,7 +69,7 @@ void NotificationController::updateChannelNotification(
 bool NotificationController::isChannelNotified(const QString &channelName,
                                                Platform p)
 {
-    for (const auto &channel : this->channelMap[p].getVector())
+    for (const auto &channel : this->channelMap[p])
     {
         if (channelName.toLower() == channel.toLower())
         {
diff --git a/src/controllers/pings/PingController.cpp b/src/controllers/pings/PingController.cpp
index 0f0ed37d8..b61d6e795 100644
--- a/src/controllers/pings/PingController.cpp
+++ b/src/controllers/pings/PingController.cpp
@@ -25,7 +25,7 @@ PingModel *PingController::createModel(QObject *parent)
 
 bool PingController::isMuted(const QString &channelName)
 {
-    for (const auto &channel : this->channelVector.getVector())
+    for (const auto &channel : this->channelVector)
     {
         if (channelName.toLower() == channel.toLower())
         {
diff --git a/src/messages/MessageElement.cpp b/src/messages/MessageElement.cpp
index e5920fb6f..774d569b9 100644
--- a/src/messages/MessageElement.cpp
+++ b/src/messages/MessageElement.cpp
@@ -348,7 +348,7 @@ void TwitchModerationElement::addToContainer(MessageLayoutContainer &container,
                    int(container.getScale() * 16));
 
         for (const auto &action :
-             getApp()->moderationActions->items.getVector())
+             getApp()->moderationActions->items)
         {
             if (auto image = action.getImage())
             {
diff --git a/src/providers/twitch/TwitchAccountManager.cpp b/src/providers/twitch/TwitchAccountManager.cpp
index 5b7a2c431..b6fdc5c68 100644
--- a/src/providers/twitch/TwitchAccountManager.cpp
+++ b/src/providers/twitch/TwitchAccountManager.cpp
@@ -35,7 +35,7 @@ std::vector<QString> TwitchAccountManager::getUsernames() const
 
     std::lock_guard<std::mutex> lock(this->mutex_);
 
-    for (const auto &user : this->accounts.getVector())
+    for (const auto &user : this->accounts)
     {
         userNames.push_back(user->getUserName());
     }
@@ -48,7 +48,7 @@ std::shared_ptr<TwitchAccount> TwitchAccountManager::findUserByUsername(
 {
     std::lock_guard<std::mutex> lock(this->mutex_);
 
-    for (const auto &user : this->accounts.getVector())
+    for (const auto &user : this->accounts)
     {
         if (username.compare(user->getUserName(), Qt::CaseInsensitive) == 0)
         {
diff --git a/src/providers/twitch/TwitchMessageBuilder.cpp b/src/providers/twitch/TwitchMessageBuilder.cpp
index 9ba46c8f1..0ff3e74e2 100644
--- a/src/providers/twitch/TwitchMessageBuilder.cpp
+++ b/src/providers/twitch/TwitchMessageBuilder.cpp
@@ -60,7 +60,7 @@ bool TwitchMessageBuilder::isIgnored() const
     auto app = getApp();
 
     // TODO(pajlada): Do we need to check if the phrase is valid first?
-    for (const auto &phrase : app->ignores->phrases.getVector())
+    for (const auto &phrase : app->ignores->phrases)
     {
         if (phrase.isBlock() && phrase.isMatch(this->originalMessage_))
         {
@@ -221,7 +221,7 @@ MessagePtr TwitchMessageBuilder::build()
         }
     }
     auto app = getApp();
-    const auto &phrases = app->ignores->phrases.getVector();
+    const auto &phrases = app->ignores->phrases;
     auto removeEmotesInRange =
         [](int pos, int len,
            std::vector<std::tuple<int, EmotePtr, EmoteName>>
diff --git a/src/widgets/splits/SplitHeader.cpp b/src/widgets/splits/SplitHeader.cpp
index fe3457899..8ee3e34b0 100644
--- a/src/widgets/splits/SplitHeader.cpp
+++ b/src/widgets/splits/SplitHeader.cpp
@@ -177,7 +177,7 @@ void SplitHeader::initializeLayout()
                     {
                         case Qt::LeftButton:
                             if (getApp()
-                                    ->moderationActions->items.getVector()
+                                    ->moderationActions->items
                                     .empty())
                             {
                                 getApp()->windows->showSettingsDialog(
@@ -224,7 +224,7 @@ void SplitHeader::initializeLayout()
     // update moderation button when items changed
     this->managedConnect(
         getApp()->moderationActions->items.delayedItemsChanged, [this] {
-            if (getApp()->moderationActions->items.getVector().empty())
+            if (getApp()->moderationActions->items.empty())
             {
                 if (this->split_->getModerationMode())
                     this->split_->setModerationMode(true);
@@ -509,7 +509,7 @@ void SplitHeader::updateModerationModeIcon()
 {
     auto moderationMode =
         this->split_->getModerationMode() &&
-        !getApp()->moderationActions->items.getVector().empty();
+        !getApp()->moderationActions->items.empty();
 
     this->moderationButton_->setPixmap(
         moderationMode ? getApp()->resources->buttons.modModeEnabled