diff --git a/source/base/StarConfiguration.cpp b/source/base/StarConfiguration.cpp
index 00c0299..c1529ae 100644
--- a/source/base/StarConfiguration.cpp
+++ b/source/base/StarConfiguration.cpp
@@ -12,6 +12,7 @@ Json Configuration::defaultConfiguration() const {
 }
 
 Json Configuration::currentConfiguration() const {
+  MutexLocker locker(m_mutex);
   return m_currentConfig;
 }