diff --git a/include/game/game_handler.hpp b/include/game/game_handler.hpp
index 27cd9e04..9603b548 100644
--- a/include/game/game_handler.hpp
+++ b/include/game/game_handler.hpp
@@ -800,6 +800,12 @@ public:
      */
     void update(float deltaTime);
 
+    /**
+     * Reset DBC-backed caches so they reload from new expansion data.
+     * Called by Application when the expansion profile changes.
+     */
+    void resetDbcCaches();
+
 private:
     void autoTargetAttacker(uint64_t attackerGuid);
 
diff --git a/src/core/application.cpp b/src/core/application.cpp
index fb823150..6fd873de 100644
--- a/src/core/application.cpp
+++ b/src/core/application.cpp
@@ -516,6 +516,11 @@ void Application::reloadExpansionData() {
     // Reset map name cache so it reloads from new expansion's Map.dbc
     mapNameCacheLoaded_ = false;
     mapNameById_.clear();
+
+    // Reset game handler DBC caches so they reload from new expansion data
+    if (gameHandler) {
+        gameHandler->resetDbcCaches();
+    }
 }
 
 void Application::logoutToLogin() {
diff --git a/src/game/game_handler.cpp b/src/game/game_handler.cpp
index 242d1364..b3e6250d 100644
--- a/src/game/game_handler.cpp
+++ b/src/game/game_handler.cpp
@@ -220,6 +220,24 @@ void GameHandler::disconnect() {
     LOG_INFO("Disconnected from world server");
 }
 
+void GameHandler::resetDbcCaches() {
+    spellNameCacheLoaded_ = false;
+    spellNameCache_.clear();
+    skillLineDbcLoaded_ = false;
+    skillLineNames_.clear();
+    skillLineCategories_.clear();
+    skillLineAbilityLoaded_ = false;
+    spellToSkillLine_.clear();
+    taxiDbcLoaded_ = false;
+    taxiNodes_.clear();
+    taxiPathEdges_.clear();
+    taxiPathNodes_.clear();
+    talentDbcLoaded_ = false;
+    talentCache_.clear();
+    talentTabCache_.clear();
+    LOG_INFO("GameHandler: DBC caches cleared for expansion switch");
+}
+
 bool GameHandler::isConnected() const {
     return socket && socket->isConnected();
 }