diff --git a/src/pmrep/pmrep.py b/src/pmrep/pmrep.py
index 887a754..f54deeb 100755
--- a/src/pmrep/pmrep.py
+++ b/src/pmrep/pmrep.py
@@ -1337,13 +1337,25 @@ class PMReporter(object):
             self.zabbix_prevsend = ts
 
     def finalize(self):
-        """ Finalize and clean up """
-        if self.writer:
-            self.writer.flush()
-            self.writer = None
-        if self.pmi:
-            self.pmi.pmiEnd()
-            self.pmi = None
+        try:
+            """ Finalize and clean up """
+            if self.writer:
+                self.writer.flush()
+                self.writer = None
+            if self.pmi:
+                self.pmi.pmiEnd()
+                self.pmi = None
+        finally:
+           try:
+               sys.stdout.flush()
+           finally:
+               try:
+                   sys.stdout.close()
+               finally:
+                   try:
+                       sys.stderr.flush()
+                   finally:
+                       sys.stderr.close()
 
 if __name__ == '__main__':
     try: