diff --git a/include/graphqlservice/GraphQLClient.h b/include/graphqlservice/GraphQLClient.h
index a1f5b5d7..13ce6cdf 100644
--- a/include/graphqlservice/GraphQLClient.h
+++ b/include/graphqlservice/GraphQLClient.h
@@ -168,9 +168,16 @@ struct ModifiedVariable
 		response::Value result { response::Type::List };
 
 		result.reserve(listValue.size());
-		std::ranges::for_each(listValue, [&result](auto& value) {
-			result.emplace_back(serialize<Other...>(std::move(value)));
-		});
+		if constexpr(std::is_same_v<Type,bool>){
+			for (auto const v: listValue)
+				result.emplace_back(Variable<bool>::serialize(bool{v}));
+		}
+		else{
+			std::ranges::for_each(listValue, [&result](auto& value) {
+				result.emplace_back(serialize<Other...>(std::move(value)));
+			});		
+		}
+		
 		listValue.clear();
 
 		return result;
@@ -217,11 +224,19 @@ struct ModifiedVariable
 		duplicate(const typename VariableTraits<Type, Modifier, Other...>::type& listValue)
 		requires ListModifier<Modifier>
 	{
-		typename VariableTraits<Type, Modifier, Other...>::type result(listValue.size());
-
-		std::ranges::transform(listValue, result.begin(), duplicate<Other...>);
-
-		return result;
+		if constexpr(std::is_same_v<Type,bool>){
+			typename VariableTraits<Type, Modifier, Other...>::type result;			
+			result.reserve(listValue.size());
+			for (auto const v: listValue)
+				result.push_back(v);
+			return result;
+		}
+		else
+		{
+			typename VariableTraits<Type, Modifier, Other...>::type result(listValue.size());
+			std::ranges::transform(listValue, result.begin(), duplicate<Other...>);
+			return result;
+		}
 	}
 };
 
diff --git a/include/graphqlservice/GraphQLService.h b/include/graphqlservice/GraphQLService.h
index b6c6eac2..dacf9ce5 100644
--- a/include/graphqlservice/GraphQLService.h
+++ b/include/graphqlservice/GraphQLService.h
@@ -795,11 +795,19 @@ struct ModifiedArgument
 		duplicate(const typename ArgumentTraits<Type, Modifier, Other...>::type& listValue)
 		requires ListModifier<Modifier>
 	{
-		typename ArgumentTraits<Type, Modifier, Other...>::type result(listValue.size());
-
-		std::ranges::transform(listValue, result.begin(), duplicate<Other...>);
-
-		return result;
+		if constexpr(std::is_same_v<Type,bool>){
+			typename ArgumentTraits<Type, Modifier, Other...>::type result;			
+			result.reserve(listValue.size());
+			for (auto const v: listValue)
+				result.push_back(v);
+			return result;
+		}
+		else
+		{
+			typename ArgumentTraits<Type, Modifier, Other...>::type result(listValue.size());		
+			std::ranges::transform(listValue, result.begin(), duplicate<Other...>);
+			return result;
+		}
 	}
 };
 
diff --git a/samples/client/multiple/MultipleQueriesClient.cpp b/samples/client/multiple/MultipleQueriesClient.cpp
index 1644ddcb..177380a0 100644
--- a/samples/client/multiple/MultipleQueriesClient.cpp
+++ b/samples/client/multiple/MultipleQueriesClient.cpp
@@ -131,6 +131,7 @@ CompleteTaskInput::CompleteTaskInput() noexcept
 	, testTaskState {}
 	, isComplete {}
 	, clientMutationId {}
+	, boolList {}
 {
 	// Explicit definition to prevent ODR violations when LTO is enabled.
 }
@@ -139,11 +140,13 @@ CompleteTaskInput::CompleteTaskInput(
 		response::IdType idArg,
 		std::optional<TaskState> testTaskStateArg,
 		std::optional<bool> isCompleteArg,
-		std::optional<std::string> clientMutationIdArg) noexcept
+		std::optional<std::string> clientMutationIdArg,
+		std::optional<std::vector<bool>> boolListArg) noexcept
 	: id { std::move(idArg) }
 	, testTaskState { std::move(testTaskStateArg) }
 	, isComplete { std::move(isCompleteArg) }
 	, clientMutationId { std::move(clientMutationIdArg) }
+	, boolList { std::move(boolListArg) }
 {
 }
 
@@ -152,6 +155,7 @@ CompleteTaskInput::CompleteTaskInput(const CompleteTaskInput& other)
 	, testTaskState { ModifiedVariable<TaskState>::duplicate<TypeModifier::Nullable>(other.testTaskState) }
 	, isComplete { ModifiedVariable<bool>::duplicate<TypeModifier::Nullable>(other.isComplete) }
 	, clientMutationId { ModifiedVariable<std::string>::duplicate<TypeModifier::Nullable>(other.clientMutationId) }
+	, boolList { ModifiedVariable<bool>::duplicate<TypeModifier::Nullable, TypeModifier::List>(other.boolList) }
 {
 }
 
@@ -160,6 +164,7 @@ CompleteTaskInput::CompleteTaskInput(CompleteTaskInput&& other) noexcept
 	, testTaskState { std::move(other.testTaskState) }
 	, isComplete { std::move(other.isComplete) }
 	, clientMutationId { std::move(other.clientMutationId) }
+	, boolList { std::move(other.boolList) }
 {
 }
 
@@ -179,6 +184,7 @@ CompleteTaskInput& CompleteTaskInput::operator=(CompleteTaskInput&& other) noexc
 	testTaskState = std::move(other.testTaskState);
 	isComplete = std::move(other.isComplete);
 	clientMutationId = std::move(other.clientMutationId);
+	boolList = std::move(other.boolList);
 
 	return *this;
 }
@@ -2316,6 +2322,7 @@ response::Value Variable<CompleteTaskInput>::serialize(CompleteTaskInput&& input
 	result.emplace_back(R"js(testTaskState)js"s, ModifiedVariable<TaskState>::serialize<TypeModifier::Nullable>(std::move(inputValue.testTaskState)));
 	result.emplace_back(R"js(isComplete)js"s, ModifiedVariable<bool>::serialize<TypeModifier::Nullable>(std::move(inputValue.isComplete)));
 	result.emplace_back(R"js(clientMutationId)js"s, ModifiedVariable<std::string>::serialize<TypeModifier::Nullable>(std::move(inputValue.clientMutationId)));
+	result.emplace_back(R"js(boolList)js"s, ModifiedVariable<bool>::serialize<TypeModifier::Nullable, TypeModifier::List>(std::move(inputValue.boolList)));
 
 	return result;
 }
diff --git a/samples/client/multiple/MultipleQueriesClient.h b/samples/client/multiple/MultipleQueriesClient.h
index 4e711034..a7c7460e 100644
--- a/samples/client/multiple/MultipleQueriesClient.h
+++ b/samples/client/multiple/MultipleQueriesClient.h
@@ -132,7 +132,8 @@ struct [[nodiscard("unnecessary construction")]] CompleteTaskInput
 		response::IdType idArg,
 		std::optional<TaskState> testTaskStateArg,
 		std::optional<bool> isCompleteArg,
-		std::optional<std::string> clientMutationIdArg) noexcept;
+		std::optional<std::string> clientMutationIdArg,
+		std::optional<std::vector<bool>> boolListArg) noexcept;
 	CompleteTaskInput(const CompleteTaskInput& other);
 	CompleteTaskInput(CompleteTaskInput&& other) noexcept;
 	~CompleteTaskInput();
@@ -144,6 +145,7 @@ struct [[nodiscard("unnecessary construction")]] CompleteTaskInput
 	std::optional<TaskState> testTaskState;
 	std::optional<bool> isComplete;
 	std::optional<std::string> clientMutationId;
+	std::optional<std::vector<bool>> boolList;
 };
 
 namespace client {
diff --git a/samples/client/mutate/MutateClient.cpp b/samples/client/mutate/MutateClient.cpp
index f54db298..248b86a8 100644
--- a/samples/client/mutate/MutateClient.cpp
+++ b/samples/client/mutate/MutateClient.cpp
@@ -64,6 +64,7 @@ CompleteTaskInput::CompleteTaskInput() noexcept
 	, testTaskState {}
 	, isComplete {}
 	, clientMutationId {}
+	, boolList {}
 {
 	// Explicit definition to prevent ODR violations when LTO is enabled.
 }
@@ -72,11 +73,13 @@ CompleteTaskInput::CompleteTaskInput(
 		response::IdType idArg,
 		std::optional<TaskState> testTaskStateArg,
 		std::optional<bool> isCompleteArg,
-		std::optional<std::string> clientMutationIdArg) noexcept
+		std::optional<std::string> clientMutationIdArg,
+		std::optional<std::vector<bool>> boolListArg) noexcept
 	: id { std::move(idArg) }
 	, testTaskState { std::move(testTaskStateArg) }
 	, isComplete { std::move(isCompleteArg) }
 	, clientMutationId { std::move(clientMutationIdArg) }
+	, boolList { std::move(boolListArg) }
 {
 }
 
@@ -85,6 +88,7 @@ CompleteTaskInput::CompleteTaskInput(const CompleteTaskInput& other)
 	, testTaskState { ModifiedVariable<TaskState>::duplicate<TypeModifier::Nullable>(other.testTaskState) }
 	, isComplete { ModifiedVariable<bool>::duplicate<TypeModifier::Nullable>(other.isComplete) }
 	, clientMutationId { ModifiedVariable<std::string>::duplicate<TypeModifier::Nullable>(other.clientMutationId) }
+	, boolList { ModifiedVariable<bool>::duplicate<TypeModifier::Nullable, TypeModifier::List>(other.boolList) }
 {
 }
 
@@ -93,6 +97,7 @@ CompleteTaskInput::CompleteTaskInput(CompleteTaskInput&& other) noexcept
 	, testTaskState { std::move(other.testTaskState) }
 	, isComplete { std::move(other.isComplete) }
 	, clientMutationId { std::move(other.clientMutationId) }
+	, boolList { std::move(other.boolList) }
 {
 }
 
@@ -112,6 +117,7 @@ CompleteTaskInput& CompleteTaskInput::operator=(CompleteTaskInput&& other) noexc
 	testTaskState = std::move(other.testTaskState);
 	isComplete = std::move(other.isComplete);
 	clientMutationId = std::move(other.clientMutationId);
+	boolList = std::move(other.boolList);
 
 	return *this;
 }
@@ -148,6 +154,7 @@ response::Value Variable<CompleteTaskInput>::serialize(CompleteTaskInput&& input
 	result.emplace_back(R"js(testTaskState)js"s, ModifiedVariable<TaskState>::serialize<TypeModifier::Nullable>(std::move(inputValue.testTaskState)));
 	result.emplace_back(R"js(isComplete)js"s, ModifiedVariable<bool>::serialize<TypeModifier::Nullable>(std::move(inputValue.isComplete)));
 	result.emplace_back(R"js(clientMutationId)js"s, ModifiedVariable<std::string>::serialize<TypeModifier::Nullable>(std::move(inputValue.clientMutationId)));
+	result.emplace_back(R"js(boolList)js"s, ModifiedVariable<bool>::serialize<TypeModifier::Nullable, TypeModifier::List>(std::move(inputValue.boolList)));
 
 	return result;
 }
diff --git a/samples/client/mutate/MutateClient.h b/samples/client/mutate/MutateClient.h
index 4c945b24..72a67a45 100644
--- a/samples/client/mutate/MutateClient.h
+++ b/samples/client/mutate/MutateClient.h
@@ -65,7 +65,8 @@ struct [[nodiscard("unnecessary construction")]] CompleteTaskInput
 		response::IdType idArg,
 		std::optional<TaskState> testTaskStateArg,
 		std::optional<bool> isCompleteArg,
-		std::optional<std::string> clientMutationIdArg) noexcept;
+		std::optional<std::string> clientMutationIdArg,
+		std::optional<std::vector<bool>> boolListArg) noexcept;
 	CompleteTaskInput(const CompleteTaskInput& other);
 	CompleteTaskInput(CompleteTaskInput&& other) noexcept;
 	~CompleteTaskInput();
@@ -77,6 +78,7 @@ struct [[nodiscard("unnecessary construction")]] CompleteTaskInput
 	std::optional<TaskState> testTaskState;
 	std::optional<bool> isComplete;
 	std::optional<std::string> clientMutationId;
+	std::optional<std::vector<bool>> boolList;
 };
 
 namespace client {
diff --git a/samples/today/schema.today.graphql b/samples/today/schema.today.graphql
index 8c794450..94e9770a 100644
--- a/samples/today/schema.today.graphql
+++ b/samples/today/schema.today.graphql
@@ -87,6 +87,7 @@ input CompleteTaskInput {
     testTaskState: TaskState
     isComplete: Boolean = true
     clientMutationId: String
+    boolList: [Boolean!]
 }
 
 type CompleteTaskPayload {
diff --git a/test/ClientTests.cpp b/test/ClientTests.cpp
index 26a1bcb9..4f674d00 100644
--- a/test/ClientTests.cpp
+++ b/test/ClientTests.cpp
@@ -246,7 +246,8 @@ TEST_F(ClientCase, MutateCompleteTask)
 		{ std::make_unique<CompleteTaskInput>(CompleteTaskInput { today::getFakeTaskId(),
 			std::nullopt,
 			std::make_optional(true),
-			std::make_optional("Hi There!"s) }) });
+			std::make_optional("Hi There!"s),
+			std::vector<bool>({true,false})  }) });
 
 	auto state = std::make_shared<today::RequestState>(5);
 	auto result =