diff --git a/src/utils/labeled_tuple.hpp b/src/utils/labeled_tuple.hpp
index a224141..795f37f 100644
--- a/src/utils/labeled_tuple.hpp
+++ b/src/utils/labeled_tuple.hpp
@@ -170,15 +170,15 @@
 };
 
 template <class... Args, class... Labels>
-inline void to_json(nlohmann::json& json,
-                    const LabeledTuple<std::tuple<Args...>, Labels...>& tuple)
+void to_json(nlohmann::json& json,
+             const LabeledTuple<std::tuple<Args...>, Labels...>& tuple)
 {
     json = tuple.to_json();
 }
 
 template <class... Args, class... Labels>
-inline void from_json(const nlohmann::json& json,
-                      LabeledTuple<std::tuple<Args...>, Labels...>& tuple)
+void from_json(const nlohmann::json& json,
+               LabeledTuple<std::tuple<Args...>, Labels...>& tuple)
 {
     tuple.from_json(json);
 }