diff --git a/app/json-schema-validate.cpp b/app/json-schema-validate.cpp
index e270caf..f643dc7 100644
--- a/app/json-schema-validate.cpp
+++ b/app/json-schema-validate.cpp
@@ -26,7 +26,6 @@
 #include <json-schema.hpp>
 
 #include <fstream>
-#include <set>
 
 using nlohmann::json;
 using nlohmann::json_uri;