diff --git a/src/app/RackWidget.cpp b/src/app/RackWidget.cpp
index 3d379d1d..fc933318 100644
--- a/src/app/RackWidget.cpp
+++ b/src/app/RackWidget.cpp
@@ -485,7 +485,7 @@ static PasteJsonResult RackWidget_pasteJson(RackWidget* that, json_t* rootJ, his
 			if (inputModuleIdIt == newModules.end())
 				continue;
 			inputModuleId = inputModuleIdIt->second->module->id;
-			json_object_set(cableJ, "inputModuleId", json_integer(inputModuleId));
+			json_object_set_new(cableJ, "inputModuleId", json_integer(inputModuleId));
 
 			json_t* outputModuleIdJ = json_object_get(cableJ, "outputModuleId");
 			if (!outputModuleIdJ)
@@ -495,7 +495,7 @@ static PasteJsonResult RackWidget_pasteJson(RackWidget* that, json_t* rootJ, his
 			if (outputModuleIdIt == newModules.end())
 				continue;
 			outputModuleId = outputModuleIdIt->second->module->id;
-			json_object_set(cableJ, "outputModuleId", json_integer(outputModuleId));
+			json_object_set_new(cableJ, "outputModuleId", json_integer(outputModuleId));
 
 			// Create Cable
 			engine::Cable* cable = new engine::Cable;
diff --git a/src/engine/Module.cpp b/src/engine/Module.cpp
index d944cdd7..d83a5b75 100644
--- a/src/engine/Module.cpp
+++ b/src/engine/Module.cpp
@@ -217,7 +217,7 @@ json_t* Module::paramsToJson() {
 
 		json_object_set_new(paramJ, "id", json_integer(paramId));
 
-		json_array_append(rootJ, paramJ);
+		json_array_append_new(rootJ, paramJ);
 	}
 	return rootJ;
 }
diff --git a/src/library.cpp b/src/library.cpp
index d1c9958d..b621d8e7 100644
--- a/src/library.cpp
+++ b/src/library.cpp
@@ -66,7 +66,7 @@ void checkAppUpdate() {
 
 	std::string versionUrl = API_URL + "/version";
 	json_t* reqJ = json_object();
-	json_object_set(reqJ, "edition", json_string(APP_EDITION.c_str()));
+	json_object_set_new(reqJ, "edition", json_string(APP_EDITION.c_str()));
 	DEFER({json_decref(reqJ);});
 
 	json_t* resJ = network::requestJson(network::METHOD_GET, versionUrl, reqJ);
@@ -115,8 +115,8 @@ void logIn(std::string email, std::string password) {
 
 	loginStatus = "Logging in...";
 	json_t* reqJ = json_object();
-	json_object_set(reqJ, "email", json_string(email.c_str()));
-	json_object_set(reqJ, "password", json_string(password.c_str()));
+	json_object_set_new(reqJ, "email", json_string(email.c_str()));
+	json_object_set_new(reqJ, "password", json_string(password.c_str()));
 	std::string url = API_URL + "/token";
 	json_t* resJ = network::requestJson(network::METHOD_POST, url, reqJ);
 	json_decref(reqJ);
@@ -196,7 +196,7 @@ void checkUpdates() {
 	// Get library manifests
 	std::string manifestsUrl = API_URL + "/library/manifests";
 	json_t* manifestsReq = json_object();
-	json_object_set(manifestsReq, "version", json_string(APP_VERSION_MAJOR.c_str()));
+	json_object_set_new(manifestsReq, "version", json_string(APP_VERSION_MAJOR.c_str()));
 	json_t* manifestsResJ = network::requestJson(network::METHOD_GET, manifestsUrl, manifestsReq);
 	json_decref(manifestsReq);
 	if (!manifestsResJ) {