diff --git a/include/nlohmann/detail/output/serializer.hpp b/include/nlohmann/detail/output/serializer.hpp
index 0b608f8e2..857fc2445 100644
--- a/include/nlohmann/detail/output/serializer.hpp
+++ b/include/nlohmann/detail/output/serializer.hpp
@@ -18,7 +18,6 @@
 #include <cstdio> // snprintf
 #include <limits> // numeric_limits
 #include <string> // string, char_traits
-#include <iomanip> // setfill, setw
 #include <type_traits> // is_same
 #include <utility> // move
 
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index d3c8293a7..63d22b1f4 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -19122,7 +19122,6 @@ NLOHMANN_JSON_NAMESPACE_END
 #include <cstdio> // snprintf
 #include <limits> // numeric_limits
 #include <string> // string, char_traits
-#include <iomanip> // setfill, setw
 #include <type_traits> // is_same
 #include <utility> // move