diff --git a/pdfminer/pdfdevice.py b/pdfminer/pdfdevice.py
index 3efee9ed..532d59e4 100644
--- a/pdfminer/pdfdevice.py
+++ b/pdfminer/pdfdevice.py
@@ -19,6 +19,12 @@ def __init__(self, rsrcmgr):
     def __repr__(self):
         return '<PDFDevice>'
 
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        self.close()
+
     def close(self):
         return