diff --git a/launcher/modplatform/atlauncher/ATLPackManifest.cpp b/launcher/modplatform/atlauncher/ATLPackManifest.cpp
index fc6b8e3f..fdd06087 100644
--- a/launcher/modplatform/atlauncher/ATLPackManifest.cpp
+++ b/launcher/modplatform/atlauncher/ATLPackManifest.cpp
@@ -178,6 +178,7 @@ static void loadVersionMod(ATLauncher::VersionMod & p, QJsonObject & obj) {
             p.depends.append(Json::requireValueString(depends));
         }
     }
+    p.warning = Json::ensureString(obj, QString("warning"), "");
 
     p.client = Json::ensureBoolean(obj, QString("client"), false);
 
@@ -251,6 +252,14 @@ void ATLauncher::loadVersion(PackVersion & v, QJsonObject & obj)
         loadVersionConfigs(v.configs, configsObj);
     }
 
+    if(obj.contains("warnings")) {
+        auto warningsObj = Json::requireObject(obj, "warnings");
+
+        for (const auto &key : warningsObj.keys()) {
+            v.warnings[key] = Json::requireValueString(warningsObj.value(key), "warning");
+        }
+    }
+
     if(obj.contains("messages")) {
         auto messages = Json::requireObject(obj, "messages");
         loadVersionMessages(v.messages, messages);
diff --git a/launcher/modplatform/atlauncher/ATLPackManifest.h b/launcher/modplatform/atlauncher/ATLPackManifest.h
index 9f109a54..3a5d4240 100644
--- a/launcher/modplatform/atlauncher/ATLPackManifest.h
+++ b/launcher/modplatform/atlauncher/ATLPackManifest.h
@@ -109,6 +109,7 @@ struct VersionMod
     bool library;
     QString group;
     QVector<QString> depends;
+    QString warning;
 
     bool client;
 
@@ -153,6 +154,7 @@ struct PackVersion
     QVector<VersionMod> mods;
     VersionConfigs configs;
 
+    QMap<QString, QString> warnings;
     VersionMessages messages;
 };
 
diff --git a/launcher/ui/pages/modplatform/atlauncher/AtlOptionalModDialog.cpp b/launcher/ui/pages/modplatform/atlauncher/AtlOptionalModDialog.cpp
index b7cd0938..153097eb 100644
--- a/launcher/ui/pages/modplatform/atlauncher/AtlOptionalModDialog.cpp
+++ b/launcher/ui/pages/modplatform/atlauncher/AtlOptionalModDialog.cpp
@@ -17,6 +17,8 @@
 #include "AtlOptionalModDialog.h"
 #include "ui_AtlOptionalModDialog.h"
 
+#include <QMessageBox>
+
 AtlOptionalModListModel::AtlOptionalModListModel(QWidget *parent, ATLauncher::PackVersion version, QVector<ATLauncher::VersionMod> mods)
     : QAbstractListModel(parent), m_version(version), m_mods(mods) {
 
@@ -134,7 +136,21 @@ void AtlOptionalModListModel::clearAll() {
 }
 
 void AtlOptionalModListModel::toggleMod(ATLauncher::VersionMod mod, int index) {
-    setMod(mod, index, !m_selection[mod.name]);
+    auto enable = !m_selection[mod.name];
+
+    // If there is a warning for the mod, display that first (if we would be enabling the mod)
+    if (enable && !mod.warning.isEmpty() && m_version.warnings.contains(mod.warning)) {
+        auto message = QString("%1<br><br>%2")
+                .arg(m_version.warnings[mod.warning], tr("Are you sure that you want to enable this mod?"));
+
+        // fixme: avoid casting here
+        auto result = QMessageBox::warning((QWidget*) this->parent(), tr("Warning"), message, QMessageBox::Yes | QMessageBox::No);
+        if (result != QMessageBox::Yes) {
+            return;
+        }
+    }
+
+    setMod(mod, index, enable);
 }
 
 void AtlOptionalModListModel::setMod(ATLauncher::VersionMod mod, int index, bool enable, bool shouldEmit) {