diff --git a/CHANGELOG.md b/CHANGELOG.md
index 18742324f58..b92117d1627 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,14 @@
 Change log
 ==========
 
+1.21.2 (2018-05-03)
+-------------------
+
+### Bugfixes
+
+- Fixed a bug where the ip_range attirbute in IPAM configs was prevented
+  from passing validation
+
 1.21.1 (2018-04-27)
 -------------------
 
diff --git a/compose/__init__.py b/compose/__init__.py
index 6baeabc14d2..34974e80418 100644
--- a/compose/__init__.py
+++ b/compose/__init__.py
@@ -1,4 +1,4 @@
 from __future__ import absolute_import
 from __future__ import unicode_literals
 
-__version__ = '1.21.1'
+__version__ = '1.21.2'
diff --git a/compose/config/config_schema_v2.0.json b/compose/config/config_schema_v2.0.json
index 793cef1d6db..419f2e28c9d 100644
--- a/compose/config/config_schema_v2.0.json
+++ b/compose/config/config_schema_v2.0.json
@@ -311,7 +311,7 @@
       "type": "object",
       "properties": {
         "subnet": {"type": "string"},
-        "iprange": {"type": "string"},
+        "ip_range": {"type": "string"},
         "gateway": {"type": "string"},
         "aux_addresses": {
           "type": "object",
diff --git a/compose/config/config_schema_v2.1.json b/compose/config/config_schema_v2.1.json
index 5ea763544fe..3cb1ee21316 100644
--- a/compose/config/config_schema_v2.1.json
+++ b/compose/config/config_schema_v2.1.json
@@ -365,7 +365,7 @@
       "type": "object",
       "properties": {
         "subnet": {"type": "string"},
-        "iprange": {"type": "string"},
+        "ip_range": {"type": "string"},
         "gateway": {"type": "string"},
         "aux_addresses": {
           "type": "object",
diff --git a/compose/config/config_schema_v2.2.json b/compose/config/config_schema_v2.2.json
index a19d4c94514..8e1f288badf 100644
--- a/compose/config/config_schema_v2.2.json
+++ b/compose/config/config_schema_v2.2.json
@@ -374,7 +374,7 @@
       "type": "object",
       "properties": {
         "subnet": {"type": "string"},
-        "iprange": {"type": "string"},
+        "ip_range": {"type": "string"},
         "gateway": {"type": "string"},
         "aux_addresses": {
           "type": "object",
diff --git a/compose/config/config_schema_v2.3.json b/compose/config/config_schema_v2.3.json
index 78b716a7a7a..659dbcd1a49 100644
--- a/compose/config/config_schema_v2.3.json
+++ b/compose/config/config_schema_v2.3.json
@@ -418,7 +418,7 @@
       "type": "object",
       "properties": {
         "subnet": {"type": "string"},
-        "iprange": {"type": "string"},
+        "ip_range": {"type": "string"},
         "gateway": {"type": "string"},
         "aux_addresses": {
           "type": "object",
diff --git a/compose/config/config_schema_v2.4.json b/compose/config/config_schema_v2.4.json
index a5796d5b12a..47e11875577 100644
--- a/compose/config/config_schema_v2.4.json
+++ b/compose/config/config_schema_v2.4.json
@@ -417,7 +417,7 @@
       "type": "object",
       "properties": {
         "subnet": {"type": "string"},
-        "iprange": {"type": "string"},
+        "ip_range": {"type": "string"},
         "gateway": {"type": "string"},
         "aux_addresses": {
           "type": "object",
diff --git a/script/build/windows.ps1 b/script/build/windows.ps1
index 98a74815801..1de9bbfa4a2 100644
--- a/script/build/windows.ps1
+++ b/script/build/windows.ps1
@@ -44,16 +44,10 @@ virtualenv .\venv
 # pip and pyinstaller generate lots of warnings, so we need to ignore them
 $ErrorActionPreference = "Continue"
 
-# Install dependencies
-# Fix for https://github.com/pypa/pip/issues/3964
-# Remove-Item -Recurse -Force .\venv\Lib\site-packages\pip
-# .\venv\Scripts\easy_install pip==9.0.1
-# .\venv\Scripts\pip install --upgrade pip setuptools
-# End fix
 .\venv\Scripts\pip install pypiwin32==220
 .\venv\Scripts\pip install -r requirements.txt
 .\venv\Scripts\pip install --no-deps .
-.\venv\Scripts\pip install --allow-external pyinstaller -r requirements-build.txt
+.\venv\Scripts\pip install -r requirements-build.txt
 
 git rev-parse --short HEAD | out-file -encoding ASCII compose\GITSHA
 
diff --git a/script/release/Dockerfile b/script/release/Dockerfile
index 0d4ec27e1da..e5af676a50a 100644
--- a/script/release/Dockerfile
+++ b/script/release/Dockerfile
@@ -3,7 +3,8 @@ RUN mkdir -p /src && pip install -U Jinja2==2.10 \
     PyGithub==1.39 \
     pypandoc==1.4 \
     GitPython==2.1.9 \
-    requests==2.18.4 && \
+    requests==2.18.4 \
+    twine==1.11.0 && \
     apt-get update && apt-get install -y pandoc
 
 VOLUME /src/script/release
diff --git a/script/release/release.py b/script/release/release.py
index add8fb2d353..d0545a7e647 100755
--- a/script/release/release.py
+++ b/script/release/release.py
@@ -27,6 +27,7 @@
 from release.utils import update_init_py_version
 from release.utils import update_run_sh_version
 from release.utils import yesno
+from twine.commands.upload import main as twine_upload
 
 
 def create_initial_branch(repository, args):
@@ -78,10 +79,9 @@ def monitor_pr_status(pr_data):
                     continue
                 summary[detail.state] += 1
             print('{pending} pending, {success} successes, {failure} failures'.format(**summary))
-            if status.total_count == 0:
-                # Mostly for testing purposes against repos with no CI setup
-                return True
-            elif summary['pending'] == 0 and summary['failure'] == 0:
+            if summary['pending'] == 0 and summary['failure'] == 0 and summary['success'] > 0:
+                # This check assumes at least 1 non-DCO CI check to avoid race conditions.
+                # If testing on a repo without CI, use --skip-ci-check to avoid looping eternally
                 return True
             elif summary['failure'] > 0:
                 raise ScriptError('CI failures detected!')
@@ -156,7 +156,8 @@ def resume(args):
         if not pr_data:
             pr_data = repository.create_release_pull_request(args.release)
         check_pr_mergeable(pr_data)
-        monitor_pr_status(pr_data)
+        if not args.skip_ci:
+            monitor_pr_status(pr_data)
         downloader = BinaryDownloader(args.destination)
         files = downloader.download_all(args.release)
         if not gh_release:
@@ -195,7 +196,8 @@ def start(args):
         create_initial_branch(repository, args)
         pr_data = repository.create_release_pull_request(args.release)
         check_pr_mergeable(pr_data)
-        monitor_pr_status(pr_data)
+        if not args.skip_ci:
+            monitor_pr_status(pr_data)
         downloader = BinaryDownloader(args.destination)
         files = downloader.download_all(args.release)
         gh_release = create_release_draft(repository, args.release, pr_data, files)
@@ -239,8 +241,8 @@ def finalize(args):
         if not merge_status.merged:
             raise ScriptError('Unable to merge PR #{}: {}'.format(pr_data.number, merge_status.message))
         print('Uploading to PyPi')
-        run_setup(os.path.join(REPO_ROOT, 'setup.py'), script_args=['upload'])
-        img_manager.push_images(args.release)
+        twine_upload(['dist/*'])
+        img_manager.push_images()
         repository.publish_release(gh_release)
     except ScriptError as e:
         print(e)
@@ -310,6 +312,10 @@ def main():
         '--no-cherries', '-C', dest='cherries', action='store_false',
         help='If set, the program will not prompt the user for PR numbers to cherry-pick'
     )
+    parser.add_argument(
+        '--skip-ci-checks', dest='skip_ci', action='store_true',
+        help='If set, the program will not wait for CI jobs to complete'
+    )
     args = parser.parse_args()
 
     if args.action == 'start':
diff --git a/script/release/release.sh b/script/release/release.sh
index 2310429aaa2..affbce37b90 100755
--- a/script/release/release.sh
+++ b/script/release/release.sh
@@ -19,6 +19,7 @@ docker run -e GITHUB_TOKEN=$GITHUB_TOKEN -e BINTRAY_TOKEN=$BINTRAY_TOKEN -it \
     --mount type=bind,source=$(pwd),target=/src \
     --mount type=bind,source=$(pwd)/.git,target=/src/.git \
     --mount type=bind,source=$HOME/.docker,target=/root/.docker \
+    --mount type=bind,source=$HOME/.gitconfig,target=/root/.gitconfig \
     --mount type=bind,source=/var/run/docker.sock,target=/var/run/docker.sock \
     --mount type=bind,source=$HOME/.ssh,target=/root/.ssh \
     -v $HOME/.pypirc:/root/.pypirc \
diff --git a/script/release/release/images.py b/script/release/release/images.py
index 0c7bb20454e..d238d4d7fb6 100644
--- a/script/release/release/images.py
+++ b/script/release/release/images.py
@@ -23,6 +23,7 @@ def build_images(self, repository, files):
         distdir = os.path.join(REPO_ROOT, 'dist')
         os.makedirs(distdir, exist_ok=True)
         shutil.copy(files['docker-compose-Linux-x86_64'][0], distdir)
+        os.chmod(os.path.join(distdir, 'docker-compose-Linux-x86_64'), 0o755)
         print('Building docker/compose image')
         logstream = docker_client.build(
             REPO_ROOT, tag='docker/compose:{}'.format(self.version), dockerfile='Dockerfile.run',
diff --git a/script/release/release/repository.py b/script/release/release/repository.py
index d4d1c720111..9a5d432c084 100644
--- a/script/release/release/repository.py
+++ b/script/release/release/repository.py
@@ -196,6 +196,24 @@ def apply_patch(self, patch_data):
             f.flush()
             self.git_repo.git.am('--3way', f.name)
 
+    def get_prs_in_milestone(self, version):
+        milestones = self.gh_repo.get_milestones(state='open')
+        milestone = None
+        for ms in milestones:
+            if ms.title == version:
+                milestone = ms
+                break
+        if not milestone:
+            print('Didn\'t find a milestone matching "{}"'.format(version))
+            return None
+
+        issues = self.gh_repo.get_issues(milestone=milestone, state='all')
+        prs = []
+        for issue in issues:
+            if issue.pull_request is not None:
+                prs.append(issue.number)
+        return sorted(prs)
+
 
 def get_contributors(pr_data):
     commits = pr_data.get_commits()
diff --git a/script/run/run.sh b/script/run/run.sh
index 45e74febd9f..60e06996b71 100755
--- a/script/run/run.sh
+++ b/script/run/run.sh
@@ -15,7 +15,7 @@
 
 set -e
 
-VERSION="1.21.1"
+VERSION="1.21.2"
 IMAGE="docker/compose:$VERSION"
 
 
diff --git a/tests/unit/config/config_test.py b/tests/unit/config/config_test.py
index 4562a99ca41..085a2d01092 100644
--- a/tests/unit/config/config_test.py
+++ b/tests/unit/config/config_test.py
@@ -1344,6 +1344,38 @@ def test_config_invalid_ipam_config(self):
         assert ('networks.foo.ipam.config contains an invalid type,'
                 ' it should be an object') in excinfo.exconly()
 
+    def test_config_valid_ipam_config(self):
+        ipam_config = {
+            'subnet': '172.28.0.0/16',
+            'ip_range': '172.28.5.0/24',
+            'gateway': '172.28.5.254',
+            'aux_addresses': {
+                'host1': '172.28.1.5',
+                'host2': '172.28.1.6',
+                'host3': '172.28.1.7',
+            },
+        }
+        networks = config.load(
+            build_config_details(
+                {
+                    'version': str(V2_1),
+                    'networks': {
+                        'foo': {
+                            'driver': 'default',
+                            'ipam': {
+                                'driver': 'default',
+                                'config': [ipam_config],
+                            }
+                        }
+                    }
+                },
+                filename='filename.yml',
+            )
+        ).networks
+
+        assert 'foo' in networks
+        assert networks['foo']['ipam']['config'] == [ipam_config]
+
     def test_config_valid_service_names(self):
         for valid_name in ['_', '-', '.__.', '_what-up.', 'what_.up----', 'whatup']:
             services = config.load(