diff --git a/CHANGELOG.md b/CHANGELOG.md
index 158a160..c7a13e7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+6.6.1
+-----
+
+- Close files after reading them
+
 6.6.0
 -----
 
diff --git a/parsedmarc/__init__.py b/parsedmarc/__init__.py
index 862a449..5379711 100644
--- a/parsedmarc/__init__.py
+++ b/parsedmarc/__init__.py
@@ -32,7 +32,7 @@ from parsedmarc.utils import is_outlook_msg, convert_outlook_msg
 from parsedmarc.utils import timestamp_to_human, human_timestamp_to_datetime
 from parsedmarc.utils import parse_email
 
-__version__ = "6.6.0"
+__version__ = "6.6.1"
 
 logging.basicConfig(
     format='%(levelname)8s:%(filename)s:%(lineno)d:'
@@ -872,6 +872,7 @@ def parse_report_file(input_, nameservers=None, dns_timeout=2.0,
         file_object = input_
 
     content = file_object.read()
+    file_object.close()
     try:
         report = parse_aggregate_report_file(content,
                                              offline=offline,
diff --git a/setup.py b/setup.py
index fb5a87f..64fc89e 100644
--- a/setup.py
+++ b/setup.py
@@ -14,7 +14,7 @@ from setuptools import setup
 from codecs import open
 from os import path
 
-__version__ = "6.6.0"
+__version__ = "6.6.1"
 
 description = "A Python package and CLI for parsing aggregate and " \
               "forensic DMARC reports"