diff --git a/src/Client.cpp b/src/Client.cpp
index 70685fd..6fb131d 100644
--- a/src/Client.cpp
+++ b/src/Client.cpp
@@ -12,6 +12,7 @@
 
 #include <iostream>
 #include <fstream>
+#include <sstream>
 #include <limits>
 #include <memory>