diff --git a/progressbar/progressbar.py b/progressbar/progressbar.py
index 3baf530..a3becc3 100644
--- a/progressbar/progressbar.py
+++ b/progressbar/progressbar.py
@@ -164,6 +164,12 @@ def __next__(self):
     # an iterator.
     next = __next__
 
+    def __enter__(self):
+        self.start()
+        return self
+
+    def __exit__(self, type, value, traceback):
+        self.finish()
 
     def _env_size(self):
         """Tries to find the term_width from the environment."""