diff --git a/src/utils.hpp b/src/utils.hpp
index 8d6cf35..d005eb6 100644
--- a/src/utils.hpp
+++ b/src/utils.hpp
@@ -1,4 +1,3 @@
-#include <set>
 #include <string>
 
 // trim string in-place, removing all whitespaces and surrounding '"' symbols