diff --git a/src/internet/seafile/seafileservice.h b/src/internet/seafile/seafileservice.h
index 814167adf..1fe893708 100644
--- a/src/internet/seafile/seafileservice.h
+++ b/src/internet/seafile/seafileservice.h
@@ -62,7 +62,7 @@ class SeafileService : public CloudFileService {
  public:
   enum ApiError { NO_ERROR = 200, NOT_FOUND = 404, TOO_MANY_REQUESTS = 429 };
 
-  SeafileService(Application* app, InternetModel* parent);
+  explicit SeafileService(Application* app, InternetModel* parent);
   ~SeafileService();
 
   static const char* kServiceName;
diff --git a/src/internet/seafile/seafiletree.cpp b/src/internet/seafile/seafiletree.cpp
index 1a10eac20..f611b011f 100644
--- a/src/internet/seafile/seafiletree.cpp
+++ b/src/internet/seafile/seafiletree.cpp
@@ -24,9 +24,10 @@
 
 #include "core/logging.h"
 
-SeafileTree::SeafileTree() {}
+SeafileTree::SeafileTree(QObject* parent) : QObject(parent) {}
 
-SeafileTree::SeafileTree(const SeafileTree& copy) {
+SeafileTree::SeafileTree(const SeafileTree& copy, QObject* parent)
+    : QObject(parent) {
   libraries_ = copy.libraries();
 }
 
diff --git a/src/internet/seafile/seafiletree.h b/src/internet/seafile/seafiletree.h
index 5635156dc..1c38e9249 100644
--- a/src/internet/seafile/seafiletree.h
+++ b/src/internet/seafile/seafiletree.h
@@ -36,8 +36,8 @@ class SeafileTree : public QObject {
   Q_OBJECT
 
  public:
-  SeafileTree();
-  SeafileTree(const SeafileTree& copy);
+  explicit SeafileTree(QObject* parent = nullptr);
+  explicit SeafileTree(const SeafileTree& copy, QObject* parent = nullptr);
   ~SeafileTree();
 
   class Entry {