diff --git a/src/core/Db.hpp b/src/core/Db.hpp
index 47badce..8c96bbd 100644
--- a/src/core/Db.hpp
+++ b/src/core/Db.hpp
@@ -5,6 +5,7 @@
 #include <chrono>
 #include <optional>
 #include <memory>
+#include <vector>
 
 struct SDatabaseChallengeEntry {
     std::string       nonce      = "";