diff --git a/CHANGELOG.md b/CHANGELOG.md
index 27f6f3c52..26fd3f883 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,7 @@
 Change log
 ==========
 
-1.23.0 (2018-10-10)
+1.23.0 (2018-10-30)
 -------------------
 
 ### Important note
@@ -21,6 +21,9 @@ naming scheme accordingly before upgrading.
   to print a hash string for each service's configuration to facilitate rolling
   updates.
 
+- Added `--parallel` flag to the `docker-compose build` command, allowing
+  Compose to build up to 5 images simultaneously.
+
 - Output for the `pull` command now reports status / progress even when pulling
   multiple images in parallel.
 
diff --git a/compose/__init__.py b/compose/__init__.py
index 532f76888..b9088474f 100644
--- a/compose/__init__.py
+++ b/compose/__init__.py
@@ -1,4 +1,4 @@
 from __future__ import absolute_import
 from __future__ import unicode_literals
 
-__version__ = '1.23.0-rc3'
+__version__ = '1.23.0'
diff --git a/compose/cli/errors.py b/compose/cli/errors.py
index 82768970b..8c89da6c5 100644
--- a/compose/cli/errors.py
+++ b/compose/cli/errors.py
@@ -54,7 +54,7 @@ def handle_connection_errors(client):
     except APIError as e:
         log_api_error(e, client.api_version)
         raise ConnectionError()
-    except (ReadTimeout, socket.timeout) as e:
+    except (ReadTimeout, socket.timeout):
         log_timeout_error(client.timeout)
         raise ConnectionError()
     except Exception as e:
diff --git a/compose/config/types.py b/compose/config/types.py
index 838fb9f58..ab8f34e3d 100644
--- a/compose/config/types.py
+++ b/compose/config/types.py
@@ -125,7 +125,7 @@ def parse_extra_hosts(extra_hosts_config):
 
 
 def normalize_path_for_engine(path):
-    """Windows paths, c:\my\path\shiny, need to be changed to be compatible with
+    """Windows paths, c:\\my\\path\\shiny, need to be changed to be compatible with
     the Engine. Volume paths are expected to be linux style /c/my/path/shiny/
     """
     drive, tail = splitdrive(path)
diff --git a/compose/config/validation.py b/compose/config/validation.py
index 0fdcb37e7..87c1f2345 100644
--- a/compose/config/validation.py
+++ b/compose/config/validation.py
@@ -41,15 +41,15 @@ DOCKER_CONFIG_HINTS = {
 }
 
 
-VALID_NAME_CHARS = '[a-zA-Z0-9\._\-]'
+VALID_NAME_CHARS = r'[a-zA-Z0-9\._\-]'
 VALID_EXPOSE_FORMAT = r'^\d+(\-\d+)?(\/[a-zA-Z]+)?$'
 
 VALID_IPV4_SEG = r'(\d{1,2}|1\d{2}|2[0-4]\d|25[0-5])'
-VALID_IPV4_ADDR = "({IPV4_SEG}\.){{3}}{IPV4_SEG}".format(IPV4_SEG=VALID_IPV4_SEG)
-VALID_REGEX_IPV4_CIDR = "^{IPV4_ADDR}/(\d|[1-2]\d|3[0-2])$".format(IPV4_ADDR=VALID_IPV4_ADDR)
+VALID_IPV4_ADDR = r"({IPV4_SEG}\.){{3}}{IPV4_SEG}".format(IPV4_SEG=VALID_IPV4_SEG)
+VALID_REGEX_IPV4_CIDR = r"^{IPV4_ADDR}/(\d|[1-2]\d|3[0-2])$".format(IPV4_ADDR=VALID_IPV4_ADDR)
 
 VALID_IPV6_SEG = r'[0-9a-fA-F]{1,4}'
-VALID_REGEX_IPV6_CIDR = "".join("""
+VALID_REGEX_IPV6_CIDR = "".join(r"""
 ^
 (
     (({IPV6_SEG}:){{7}}{IPV6_SEG})|
diff --git a/requirements.txt b/requirements.txt
index 0ea046589..024b671cc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ pypiwin32==219; sys_platform == 'win32' and python_version < '3.6'
 pypiwin32==223; sys_platform == 'win32' and python_version >= '3.6'
 PySocks==1.6.7
 PyYAML==3.12
-requests==2.19.1
+requests==2.20.0
 six==1.10.0
 texttable==0.9.1
 urllib3==1.21.1; python_version == '3.3'
diff --git a/script/run/run.sh b/script/run/run.sh
index ba945d3ed..d82b54f0f 100755
--- a/script/run/run.sh
+++ b/script/run/run.sh
@@ -15,7 +15,7 @@
 
 set -e
 
-VERSION="1.23.0-rc3"
+VERSION="1.23.0"
 IMAGE="docker/compose:$VERSION"
 
 
diff --git a/setup.py b/setup.py
index a0093d8dd..8260ebc69 100644
--- a/setup.py
+++ b/setup.py
@@ -33,7 +33,7 @@ install_requires = [
     'cached-property >= 1.2.0, < 2',
     'docopt >= 0.6.1, < 0.7',
     'PyYAML >= 3.10, < 4',
-    'requests >= 2.6.1, != 2.11.0, != 2.12.2, != 2.18.0, < 2.20',
+    'requests >= 2.6.1, != 2.11.0, != 2.12.2, != 2.18.0, < 2.21',
     'texttable >= 0.9.0, < 0.10',
     'websocket-client >= 0.32.0, < 1.0',
     'docker >= 3.5.0, < 4.0',
diff --git a/tests/acceptance/cli_test.py b/tests/acceptance/cli_test.py
index 3d063d853..5b0a0e0fd 100644
--- a/tests/acceptance/cli_test.py
+++ b/tests/acceptance/cli_test.py
@@ -2361,7 +2361,7 @@ class CLITestCase(DockerClientTestCase):
         self.dispatch(['up', '-d'])
 
         result = self.dispatch(['logs', '-f', '-t'])
-        assert re.search('(\d{4})-(\d{2})-(\d{2})T(\d{2})\:(\d{2})\:(\d{2})', result.stdout)
+        assert re.search(r'(\d{4})-(\d{2})-(\d{2})T(\d{2})\:(\d{2})\:(\d{2})', result.stdout)
 
     def test_logs_tail(self):
         self.base_dir = 'tests/fixtures/logs-tail-composefile'