diff --git a/include/indicators/block_progress_bar.hpp b/include/indicators/block_progress_bar.hpp
index 4c8f34b..b0bf600 100644
--- a/include/indicators/block_progress_bar.hpp
+++ b/include/indicators/block_progress_bar.hpp
@@ -104,7 +104,10 @@ public:
     _print_progress();
   }
 
-  size_t current() { return std::min(static_cast<size_t>(_progress), size_t(100)); }
+  size_t current() {
+    std::unique_lock<std::mutex> lock{_mutex};
+    return std::min(static_cast<size_t>(_progress), size_t(100));
+  }  
 
   bool is_completed() const { return _completed; }
 
diff --git a/include/indicators/progress_bar.hpp b/include/indicators/progress_bar.hpp
index 2ee9c2d..f225c69 100644
--- a/include/indicators/progress_bar.hpp
+++ b/include/indicators/progress_bar.hpp
@@ -118,7 +118,10 @@ public:
     _print_progress();
   }
 
-  size_t current() { return std::min(static_cast<size_t>(_progress), size_t(100)); }
+  size_t current() {
+    std::unique_lock<std::mutex> lock{_mutex};
+    return std::min(static_cast<size_t>(_progress), size_t(100));
+  }
 
   bool is_completed() const { return _completed; }
 
diff --git a/include/indicators/progress_spinner.hpp b/include/indicators/progress_spinner.hpp
index 6b62d13..c9671cd 100644
--- a/include/indicators/progress_spinner.hpp
+++ b/include/indicators/progress_spinner.hpp
@@ -93,7 +93,10 @@ public:
     _print_progress();
   }
 
-  size_t current() { return std::min(static_cast<size_t>(_progress), size_t(100)); }
+  size_t current() {
+    std::unique_lock<std::mutex> lock{_mutex};
+    return std::min(static_cast<size_t>(_progress), size_t(100));
+  }    
 
   bool is_completed() const { return _completed; }