diff --git a/logger/Logger.h b/logger/Logger.h
index eb9e3e0..0214df6 100644
--- a/logger/Logger.h
+++ b/logger/Logger.h
@@ -26,6 +26,7 @@
 
 #include <fmt/core.h>
 #include <fmt/printf.h>
+#include <fmt/ostream.h>
 
 #pragma GCC diagnostic pop