diff --git a/behavex/global_vars.py b/behavex/global_vars.py
index a54fb5f..efbdc6e 100644
--- a/behavex/global_vars.py
+++ b/behavex/global_vars.py
@@ -81,6 +81,10 @@ def progress_bar_instance(self, progress_bar_instance):
     def execution_start_time(self):
         return self._execution_start_time
 
+    @execution_start_time.setter
+    def execution_start_time(self, execution_start_time):
+        self._execution_start_time = execution_start_time
+
     @property
     def execution_elapsed_time(self):
         return time.time() - self._execution_start_time
diff --git a/setup.py b/setup.py
index c3a73cd..c04a2c6 100644
--- a/setup.py
+++ b/setup.py
@@ -6,7 +6,7 @@
 
 setup(
     name='behavex',
-    version='4.0.1rc4',
+    version='4.0.1rc6',
     license="MIT",
     platforms=['any'],
     python_requires='>=3.5',