diff --git a/.travis.yml b/.travis.yml
index 7a867f8..c99facb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,7 +10,7 @@ python:
 # commands to install dependencies
 before_install:
   - "sudo apt-get update"
-  - "sudo apt-get install -y libemail-outlook-message-perl"
+  - "sudo apt-get install -y libemail-outlook-message-perl geoipupdate"
   - "curl -O https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.5.1.deb && sudo dpkg -i --force-confnew elasticsearch-6.5.1.deb && sudo service elasticsearch restart"
 
 install:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e10beca..424ec67 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+6.1.5
+-----
+
+- Always use Cloudflare's nameservers by default instead of Google's
+- Avoid re-downloading the Geolite2 database (and tripping their DDoS protection)
+- Add `geoipupdate` to install instructions
+
 6.1.4
 -----
 
diff --git a/docs/index.rst b/docs/index.rst
index 97b6bf9..d961e45 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -465,19 +465,24 @@ On Debian or Ubuntu systems, run:
 
 .. code-block:: bash
 
-    sudo apt-get install python3-pip
-
+    sudo apt-get install -y python3-pip geoipupdate
 
 On CentOS systems, run:
 
 .. code-block:: bash
 
-   sudo yum install -y python34-setuptools
+   sudo yum install -y python34-setuptools GeoIP-Update
    sudo easy_install-3.4 pip
+   sudo geoipupdate
 
 Python 3 installers for Windows and macOS can be found at
 https://www.python.org/downloads/
 
+.. note::
+
+   Windows users should also download a copy of Maxmind's free
+  `GeoLite2-Country.mmdb`_ to ``C:\GeoIP\GeoLite2-Country.mmdb``.
+
 To install or upgrade to the latest stable release of ``parsedmarc`` on
 macOS or Linux, run
 
@@ -1346,6 +1351,8 @@ Indices and tables
 
 .. _Modern Auth/multi-factor authentication: http://davmail.sourceforge.net/faq.html
 
+.. _GeoLite2-Country.mmdb:https://geolite.maxmind.com/download/geoip/database/GeoLite2-Country.tar.gz
+
 .. _download the latest portable Linux version of pypy3: https://github.com/squeaky-pl/portable-pypy#portable-pypy-distribution-for-linux
 
 .. _Elasticsearch: https://www.elastic.co/guide/en/elasticsearch/reference/current/rpm.html
diff --git a/parsedmarc/__init__.py b/parsedmarc/__init__.py
index 1da952e..619e39d 100644
--- a/parsedmarc/__init__.py
+++ b/parsedmarc/__init__.py
@@ -38,7 +38,7 @@ 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__ = "6.1.4"
+__version__ = "6.1.5"
 
 logging.basicConfig(
     format='%(levelname)8s:%(filename)s:%(lineno)d:'
@@ -98,7 +98,9 @@ def _parse_report_record(record, nameservers=None, dns_timeout=2.0):
         OrderedDict: The converted record
     """
     if nameservers is None:
-        nameservers = ["8.8.8.8", "4.4.4.4"]
+        nameservers = ["1.1.1.1", "1.0.0.1",
+                       "2606:4700:4700::1111", "2606:4700:4700::1001",
+                       ]
     record = record.copy()
     new_record = OrderedDict()
     new_record_source = get_ip_address_info(record["row"]["source_ip"],
diff --git a/parsedmarc/utils.py b/parsedmarc/utils.py
index 1ef8ec1..40fd836 100644
--- a/parsedmarc/utils.py
+++ b/parsedmarc/utils.py
@@ -261,7 +261,7 @@ def get_ip_address_country(ip_address):
     Returns:
         str: And ISO country code associated with the given IP address
     """
-    def download_country_database(location=".GeoLite2-Country.mmdb"):
+    def download_country_database(location="GeoLite2-Country.mmdb"):
         """Downloads the MaxMind Geolite2 Country database
 
         Args:
@@ -281,7 +281,8 @@ def get_ip_address_country(ip_address):
         shutil.rmtree(tar_dir)
 
     system_paths = ["/usr/local/share/GeoIP/GeoLite2-Country.mmdb",
-                    "/usr/share/GeoIP/GeoLite2-Country.mmdb"]
+                    "/usr/share/GeoIP/GeoLite2-Country.mmdb"
+                    "C:\\GeoIP\\GeoLite2-Country.mmdb"]
     db_path = None
 
     for system_path in system_paths:
@@ -296,7 +297,7 @@ def get_ip_address_country(ip_address):
         else:
             db_age = datetime.now() - datetime.fromtimestamp(
                 os.stat(db_path).st_mtime)
-            if db_age > timedelta(days=60):
+            if db_age > timedelta(days=7):
                 download_country_database()
         db_path = db_path
 
diff --git a/setup.py b/setup.py
index 0b93b08..5bd11f3 100644
--- a/setup.py
+++ b/setup.py
@@ -14,7 +14,7 @@ from setuptools import setup
 from codecs import open
 from os import path
 
-__version__ = "6.1.4"
+__version__ = "6.1.5"
 
 description = "A Python package and CLI for parsing aggregate and " \
               "forensic DMARC reports"