diff --git a/.circleci/config.yml b/.circleci/config.yml
index 55dfb96b1e..7273c238c1 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -98,6 +98,24 @@ jobs:
           command: |
             .circleci/coverage.sh
 
+  test-py37:
+    docker:
+      - image: flexget/cci-python:3.7
+    environment:
+      - VCR_RECORD_MODE=none
+    steps:
+      - checkout
+      - restore_cache:
+          keys:
+          - py3.7-deps-{{ checksum "requirements.txt" }}{{ checksum "dev-requirements.txt" }}{{ checksum "dev-requirements-extras.txt" }}
+          - py3.7-deps- # fallback to using the latest cache if no exact match is found
+      - run: *install_deps
+      - save_cache:
+          paths:
+            - ./venv
+          key: py3.7-deps-{{ checksum "requirements.txt" }}{{ checksum "dev-requirements.txt" }}{{ checksum "dev-requirements-extras.txt" }}
+      - run: *run_tests
+
   deploy:
     docker:
       - image: flexget/cci-python:3.5
@@ -133,6 +151,7 @@ workflows:
       - "test-py34"
       - "test-py35"
       - "test-py36"
+      - "test-py37"
 
   auto-build-test-and-deploy:
     triggers:
@@ -147,12 +166,14 @@ workflows:
       - "test-py34"
       - "test-py35"
       - "test-py36"
+      - "test-py37"
       - deploy:
           requires:
             - "test-py27"
             - "test-py34"
             - "test-py35"
             - "test-py36"
+            - "test-py37"
 
 notify:
   webhooks:
diff --git a/.circleci/images/python27/Dockerfile b/.circleci/images/python27/Dockerfile
index a49fd26ba4..25e26a09cd 100644
--- a/.circleci/images/python27/Dockerfile
+++ b/.circleci/images/python27/Dockerfile
@@ -1,7 +1,7 @@
 FROM circleci/python:2.7
 
 # Install extra repos
-RUN sudo sed -i 's/debian jessie main$/debian jessie main contrib non-free/' /etc/apt/sources.list
+RUN sudo sed -i 's/debian stretch main$/debian stretch main contrib non-free/' /etc/apt/sources.list
 
 # Install unrar used by some flexget tests
 RUN sudo apt-get update; sudo apt-get install -qy unrar
diff --git a/.circleci/images/python33/Dockerfile b/.circleci/images/python33/Dockerfile
index 019f6c611b..d3b4585e4f 100644
--- a/.circleci/images/python33/Dockerfile
+++ b/.circleci/images/python33/Dockerfile
@@ -1,7 +1,7 @@
 FROM circleci/python:3.3
 
 # Install extra repos
-RUN sudo sed -i 's/debian jessie main$/debian jessie main contrib non-free/' /etc/apt/sources.list
+RUN sudo sed -i 's/debian stretch main$/debian stretch main contrib non-free/' /etc/apt/sources.list
 
 # Install unrar used by some flexget tests
 RUN sudo apt-get update; sudo apt-get install -qy unrar
diff --git a/.circleci/images/python34/Dockerfile b/.circleci/images/python34/Dockerfile
index 0bfe67d02e..6bdc9f9fd5 100644
--- a/.circleci/images/python34/Dockerfile
+++ b/.circleci/images/python34/Dockerfile
@@ -1,7 +1,7 @@
 FROM circleci/python:3.4
 
 # Install extra repos
-RUN sudo sed -i 's/debian jessie main$/debian jessie main contrib non-free/' /etc/apt/sources.list
+RUN sudo sed -i 's/debian stretch main$/debian stretch main contrib non-free/' /etc/apt/sources.list
 
 # Install unrar used by some flexget tests
 RUN sudo apt-get update; sudo apt-get install -qy unrar
diff --git a/.circleci/images/python35/Dockerfile b/.circleci/images/python35/Dockerfile
index 0d431c9096..1362f3cd6b 100644
--- a/.circleci/images/python35/Dockerfile
+++ b/.circleci/images/python35/Dockerfile
@@ -1,7 +1,7 @@
 FROM circleci/python:3.5
 
 # Install extra repos
-RUN sudo sed -i 's/debian jessie main$/debian jessie main contrib non-free/' /etc/apt/sources.list
+RUN sudo sed -i 's/debian stretch main$/debian stretch main contrib non-free/' /etc/apt/sources.list
 
 # Install unrar used by some flexget tests
 RUN sudo apt-get update; sudo apt-get install -qy unrar
diff --git a/.circleci/images/python36/Dockerfile b/.circleci/images/python36/Dockerfile
index 54574e92a1..488a892ad0 100644
--- a/.circleci/images/python36/Dockerfile
+++ b/.circleci/images/python36/Dockerfile
@@ -1,7 +1,7 @@
 FROM circleci/python:3.6
 
 # Install extra repos
-RUN sudo sed -i 's/debian jessie main$/debian jessie main contrib non-free/' /etc/apt/sources.list
+RUN sudo sed -i 's/debian stretch main$/debian stretch main contrib non-free/' /etc/apt/sources.list
 
 # Install unrar used by some flexget tests
 RUN sudo apt-get update; sudo apt-get install -qy unrar
diff --git a/.circleci/images/python37/Dockerfile b/.circleci/images/python37/Dockerfile
new file mode 100644
index 0000000000..488198d6d2
--- /dev/null
+++ b/.circleci/images/python37/Dockerfile
@@ -0,0 +1,10 @@
+FROM circleci/python:3.7
+
+# Install extra repos
+RUN sudo sed -i 's/debian stretch main$/debian stretch main contrib non-free/' /etc/apt/sources.list
+
+# Install unrar used by some flexget tests
+RUN sudo apt-get update; sudo apt-get install -qy unrar
+
+# Use virtualenv as we test on py2.7, keeps it consistant
+RUN sudo pip install virtualenv
diff --git a/flexget/_version.py b/flexget/_version.py
index aaaeda6602..d007f273a2 100644
--- a/flexget/_version.py
+++ b/flexget/_version.py
@@ -7,4 +7,4 @@
 The jenkins release job will automatically strip the .dev for release,
 and update the version again for continued development.
 """
-__version__ = '2.17.26.dev'
+__version__ = '2.18.0.dev'
diff --git a/flexget/plugins/clients/rtorrent.py b/flexget/plugins/clients/rtorrent.py
index 70ffe15879..4de9be5916 100644
--- a/flexget/plugins/clients/rtorrent.py
+++ b/flexget/plugins/clients/rtorrent.py
@@ -249,6 +249,7 @@ def load(self, raw_torrent, fields=None, start=False, mkdir=True):
         # Additional fields to set
         for key, val in fields.items():
             # Values must be escaped if within params
+            # TODO: What are the escaping requirements? re.escape works differently on python 3.7+
             params.append('d.%s.set=%s' % (key, re.escape(native_str(val))))
 
         if mkdir and 'directory' in fields:
diff --git a/flexget/plugins/parsers/parser_common.py b/flexget/plugins/parsers/parser_common.py
index c16568f226..275d1f9317 100644
--- a/flexget/plugins/parsers/parser_common.py
+++ b/flexget/plugins/parsers/parser_common.py
@@ -82,7 +82,8 @@ def name_to_re(name, ignore_prefixes=None, parser=None):
     res = res.strip()
     # accept either '&' or 'and'
     res = re.sub(' (&|and) ', ' (?:and|&) ', res, re.UNICODE)
-    res = re.sub(' +', blank + '*', res, re.UNICODE)
+    # The replacement has a regex escape in it (\w) which needs to be escaped again in python 3.7+
+    res = re.sub(' +', blank.replace('\\', '\\\\') + '*', res, re.UNICODE)
     if parenthetical:
         res += '(?:' + blank + '+' + parenthetical + ')?'
         # Turn on exact mode for series ending with a parenthetical,
diff --git a/flexget/tests/test_regexp_list.py b/flexget/tests/test_regexp_list.py
index 6ce9214b98..533c404b2e 100644
--- a/flexget/tests/test_regexp_list.py
+++ b/flexget/tests/test_regexp_list.py
@@ -3,7 +3,7 @@
 
 
 class TestRegexpList(object):
-    config = """
+    config = r"""
         tasks:
           regexp_list_add:
             mock:
@@ -25,7 +25,7 @@ class TestRegexpList(object):
               - title:
                   replace:
                     regexp: '$'
-                    format: ' s\d{2}e\d{2}'
+                    format: ' s\\d{2}e\\d{2}'
               - title:
                   replace:
                     regexp: ' '
diff --git a/flexget/tests/test_rtorrent.py b/flexget/tests/test_rtorrent.py
index 08d23976f8..5e635bbae0 100644
--- a/flexget/tests/test_rtorrent.py
+++ b/flexget/tests/test_rtorrent.py
@@ -3,6 +3,7 @@
 from future.moves.xmlrpc import client as xmlrpc_client
 
 import os
+import re
 
 import mock
 
@@ -67,7 +68,10 @@ def test_load(self, mocked_proxy):
 
         fields = [p for p in called_args[2:]]
         assert len(fields) == 3
-        assert 'd.directory.set=\\/data\\/downloads' in fields
+        # TODO: check the note in clients/rtorrent.py about this escaping.
+        # The client should be fixed to work consistenly on all python versions
+        # Calling re.escape here is a workaround so test works on python 3.7 and older versions
+        assert ('d.directory.set=' + re.escape('/data/downloads')) in fields
         assert 'd.custom1.set=testing' in fields
         assert 'd.priority.set=3' in fields
 
diff --git a/flexget/utils/titles/series.py b/flexget/utils/titles/series.py
index 629c0953ff..9f6675a915 100644
--- a/flexget/utils/titles/series.py
+++ b/flexget/utils/titles/series.py
@@ -41,36 +41,36 @@ class SeriesParser(TitleParser):
 
     # Make sure none of these are found embedded within a word or other numbers
     ep_regexps = ReList([TitleParser.re_not_in_word(regexp) for regexp in [
-        '(?:series|season|s)\s?(\d{1,4})(?:\s(?:.*\s)?)?(?:episode|ep|e|part|pt)\s?(\d{1,3}|%s)(?:\s?e?(\d{1,2}))?' %
+        r'(?:series|season|s)\s?(\d{1,4})(?:\s(?:.*\s)?)?(?:episode|ep|e|part|pt)\s?(\d{1,3}|%s)(?:\s?e?(\d{1,2}))?' %
         roman_numeral_re,
-        '(?:series|season)\s?(\d{1,4})\s(\d{1,3})\s?of\s?(?:\d{1,3})',
-        '(\d{1,2})\s?x\s?(\d+)(?:\s(\d{1,2}))?',
-        '(\d{1,3})\s?of\s?(?:\d{1,3})',
-        '(?:episode|e|ep|part|pt)\s?(\d{1,3}|%s)' % roman_numeral_re,
-        'part\s(%s)' % '|'.join(map(str, english_numbers)),
+        r'(?:series|season)\s?(\d{1,4})\s(\d{1,3})\s?of\s?(?:\d{1,3})',
+        r'(\d{1,2})\s?x\s?(\d+)(?:\s(\d{1,2}))?',
+        r'(\d{1,3})\s?of\s?(?:\d{1,3})',
+        r'(?:episode|e|ep|part|pt)\s?(\d{1,3}|%s)' % roman_numeral_re,
+        r'part\s(%s)' % '|'.join(map(str, english_numbers)),
     ]])
     season_pack_regexps = ReList([
         # S01 or Season 1 but not Season 1 Episode|Part 2
         r'(?:season\s?|s)(\d{1,})(?:\s|$)(?!(?:(?:.*?\s)?(?:episode|e|ep|part|pt)\s?(?:\d{1,3}|%s)|(?:\d{1,3})\s?of\s?(?:\d{1,3})))' % roman_numeral_re,
-        '(\d{1,3})\s?x\s?all',  # 1xAll
+        r'(\d{1,3})\s?x\s?all',  # 1xAll
     ])
     unwanted_regexps = ReList([
-        '(\d{1,3})\s?x\s?(0+)[^1-9]',  # 5x0
-        'S(\d{1,3})D(\d{1,3})',  # S3D1
+        r'(\d{1,3})\s?x\s?(0+)[^1-9]',  # 5x0
+        r'S(\d{1,3})D(\d{1,3})',  # S3D1
         r'(?:s|series|\b)\s?\d\s?(?:&\s?\d)?[\s-]*(?:complete|full)',
-        'disc\s\d'])
+        r'disc\s\d'])
     # Make sure none of these are found embedded within a word or other numbers
     date_regexps = ReList([TitleParser.re_not_in_word(regexp) for regexp in [
-        '(\d{2,4})%s(\d{1,2})%s(\d{1,2})' % (separators, separators),
-        '(\d{1,2})%s(\d{1,2})%s(\d{2,4})' % (separators, separators),
-        '(\d{4})x(\d{1,2})%s(\d{1,2})' % separators,
-        '(\d{1,2})(?:st|nd|rd|th)?%s([a-z]{3,10})%s(\d{4})' % (separators, separators)]])
+        r'(\d{2,4})%s(\d{1,2})%s(\d{1,2})' % (separators, separators),
+        r'(\d{1,2})%s(\d{1,2})%s(\d{2,4})' % (separators, separators),
+        r'(\d{4})x(\d{1,2})%s(\d{1,2})' % separators,
+        r'(\d{1,2})(?:st|nd|rd|th)?%s([a-z]{3,10})%s(\d{4})' % (separators, separators)]])
     sequence_regexps = ReList([TitleParser.re_not_in_word(regexp) for regexp in [
-        '(\d{1,3})(?:v(?P<version>\d))?',
-        '(?:pt|part)\s?(\d+|%s)' % roman_numeral_re]])
-    unwanted_sequence_regexps = ReList(['seasons?\s?\d{1,2}'])
+        r'(\d{1,3})(?:v(?P<version>\d))?',
+        r'(?:pt|part)\s?(\d+|%s)' % roman_numeral_re]])
+    unwanted_sequence_regexps = ReList([r'seasons?\s?\d{1,2}'])
     id_regexps = ReList([])
-    clean_regexps = ReList(['\[.*?\]', '\(.*?\)'])
+    clean_regexps = ReList([r'\[.*?\]', r'\(.*?\)'])
     # ignore prefix regexps must be passive groups with 0 or 1 occurrences  eg. (?:prefix)?
     ignore_prefixes = default_ignore_prefixes
 
@@ -158,7 +158,7 @@ def guess_name(self):
         """This will attempt to guess a series name based on the provided data."""
         # We need to replace certain characters with spaces to make sure episode parsing works right
         # We don't remove anything, as the match positions should line up with the original title
-        clean_title = re.sub('[_.,\[\]\(\):]', ' ', self.data)
+        clean_title = re.sub(r'[_.,\[\]\(\):]', ' ', self.data)
         if self.parse_unwanted(clean_title):
             return
         match = self.parse_date(clean_title)
@@ -183,7 +183,7 @@ def guess_name(self):
             # Remove possible episode title from series name (anything after a ' - ')
             name = name.split(' - ')[0]
             # Replace some special characters with spaces
-            name = re.sub('[\._\(\) ]+', ' ', name).strip(' -')
+            name = re.sub(r'[\._\(\) ]+', ' ', name).strip(' -')
             # Normalize capitalization to title case
             name = capwords(name)
             self.name = name
@@ -275,7 +275,7 @@ def parse(self, data=None, field=None, quality=None):
         # Remove unwanted words from data for ep / id parsing
         data_stripped = self.remove_words(data_stripped, self.remove, not_in_word=True)
 
-        data_parts = re.split('[\W_]+', data_stripped)
+        data_parts = re.split(r'[\W_]+', data_stripped)
 
         for part in data_parts[:]:
             if part in self.propers:
diff --git a/requirements.in b/requirements.in
index 0991dc953f..109fe0fa9f 100644
--- a/requirements.in
+++ b/requirements.in
@@ -1,13 +1,13 @@
 FeedParser>=5.2.1
 SQLAlchemy >=1.0.9, <1.999
-PyYAML
+PyYAML>=3.13
 # Beautifulsoup 4.5+ is required to support different versions of html5lib
 beautifulsoup4>=4.5
 html5lib>=0.11
 PyRSS2Gen
 pynzb
 #PY3 progressbar
-rpyc==3.3.0
+rpyc~=4.0
 jinja2~=2.10
 # There is a bug in requests 2.4.0 where it leaks urllib3 exceptions
 requests>=2.20.0
diff --git a/setup.py b/setup.py
index 86e8093d37..558a19b454 100644
--- a/setup.py
+++ b/setup.py
@@ -61,6 +61,7 @@ def load_requirements(filename):
         "Programming Language :: Python :: 3.4",
         "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",
+        "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
     ]