diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6195006..c90897f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,7 +5,7 @@ cmake_minimum_required(VERSION 3.1 FATAL_ERROR)
 ## use these variables to configure module installation
 
 set(OATPP_THIS_MODULE_NAME oatpp-swagger) ## name of the module (also name of folders in installation dirs)
-set(OATPP_THIS_MODULE_VERSION "0.19.1") ## version of the module (also sufix of folders in installation dirs)
+set(OATPP_THIS_MODULE_VERSION "0.19.4") ## version of the module (also sufix of folders in installation dirs)
 set(OATPP_THIS_MODULE_LIBRARIES oatpp-swagger) ## list of libraries to find when find_package is called
 set(OATPP_THIS_MODULE_TARGETS oatpp-swagger) ## list of targets to install
 set(OATPP_THIS_MODULE_DIRECTORIES oatpp-swagger) ## list of directories to install
diff --git a/test/oatpp-swagger/Logger.hpp b/test/oatpp-swagger/Logger.hpp
index 0a85bcb..ec2dc24 100644
--- a/test/oatpp-swagger/Logger.hpp
+++ b/test/oatpp-swagger/Logger.hpp
@@ -11,15 +11,11 @@
 
 class Logger : public oatpp::base::Logger {
 private:
-  oatpp::concurrency::SpinLock::Atom m_atom;
+  oatpp::concurrency::SpinLock m_lock;
 public:
 
-  Logger()
-    : m_atom(false)
-  {}
-
   void log(v_int32 priority, const std::string& tag, const std::string& message) override {
-    oatpp::concurrency::SpinLock lock(m_atom);
+    std::lock_guard<oatpp::concurrency::SpinLock> lock(m_lock);
     std::cout << tag << ":" << message << "\n";
   }