diff --git a/src/correct/corrector.cpp b/src/correct/corrector.cpp
index faebde7..4c17bbe 100644
--- a/src/correct/corrector.cpp
+++ b/src/correct/corrector.cpp
@@ -31,8 +31,10 @@ Corrector::~Corrector()
 {
   workerThread_->quit();
   const auto timeoutMs = 2000;
-  if (!workerThread_->wait(timeoutMs))
+  if (!workerThread_->wait(timeoutMs)) {
+    LTRACE() << "terminating hunspell thread";
     workerThread_->terminate();
+  }
 }
 
 void Corrector::correct(const TaskPtr &task)
diff --git a/src/manager.cpp b/src/manager.cpp
index 1e9d300..1d784f2 100644
--- a/src/manager.cpp
+++ b/src/manager.cpp
@@ -79,6 +79,7 @@ Manager::~Manager()
   if (updateAutoChecker_ && updateAutoChecker_->isLastCheckDateChanged()) {
     settings_->lastUpdateCheck = updateAutoChecker_->lastCheckDate();
     settings_->saveLastUpdateCheck();
+    LTRACE() << "saved last update time";
   }
 }
 
diff --git a/src/ocr/recognizer.cpp b/src/ocr/recognizer.cpp
index 4d71ffc..9138154 100644
--- a/src/ocr/recognizer.cpp
+++ b/src/ocr/recognizer.cpp
@@ -62,8 +62,10 @@ Recognizer::~Recognizer()
 {
   workerThread_->quit();
   const auto timeoutMs = 2000;
-  if (!workerThread_->wait(timeoutMs))
+  if (!workerThread_->wait(timeoutMs)) {
+    LTRACE() << "terminating tesseract thread";
     workerThread_->terminate();
+  }
 }
 
 void Recognizer::updateSettings()
diff --git a/src/service/updates.cpp b/src/service/updates.cpp
index 525b323..526b6a9 100644
--- a/src/service/updates.cpp
+++ b/src/service/updates.cpp
@@ -176,6 +176,7 @@ void Loader::handleReply(QNetworkReply *reply)
 
 void Loader::checkForUpdates()
 {
+  LTRACE() << "Loader::checkForUpdates";
   startDownloadUpdates({});
 }
 
@@ -373,6 +374,7 @@ bool Loader::handleComponentReply(QNetworkReply *reply)
 
 void Loader::finishUpdate(const QString &error)
 {
+  LTRACE() << "Loader::finishUpdate";
   currentActions_.clear();
   for (const auto &i : downloads_) i.first->deleteLater();
   downloads_.clear();
@@ -385,6 +387,7 @@ void Loader::finishUpdate(const QString &error)
 
 void Loader::commitUpdate()
 {
+  LTRACE() << "Loader::commitUpdate";
   SOFT_ASSERT(!currentActions_.empty(), return );
   Installer installer(currentActions_);
   if (installer.commit()) {