diff --git a/buildbot/docker-builders/centos8-64/Dockerfile b/buildbot/docker-builders/centos8-64/Dockerfile
new file mode 100644
index 0000000..019a177
--- /dev/null
+++ b/buildbot/docker-builders/centos8-64/Dockerfile
@@ -0,0 +1,17 @@
+FROM centos:8
+RUN yum install -y epel-release
+RUN yum --exclude=iputils update -y && yum install -y \
+    git curl wget mock rpm-build \
+    python36 python3-libs python36-devel python3-pip python3-numpy python3-pillow \
+    redhat-rpm-config gcc libffi-devel openssl-devel \
+    && yum groupinstall -y "Development Tools"
+RUN ln -sf /usr/bin/python3.6 /usr/bin/python3 \
+    && ln -sf /usr/bin/pip3.6 /usr/bin/pip3
+
+RUN python3 -m pip install "buildbot[bundle]" sphinx
+
+ENV WORKER_NAME diax-centos8-64
+ENV WORKER_ADMIN Andrew Chin <andrew@andrewchin.net>
+ENV WORKER_INFO CentOS 8 64-bit
+COPY worker-start.sh /root/
+CMD /root/worker-start.sh
diff --git a/buildbot/docker-builders/centos8-64/worker-start.sh b/buildbot/docker-builders/centos8-64/worker-start.sh
new file mode 100755
index 0000000..ebc26bd
--- /dev/null
+++ b/buildbot/docker-builders/centos8-64/worker-start.sh
@@ -0,0 +1,18 @@
+#!/bin/bash
+
+cd /root/
+if [ ! -d "worker" ]; then
+    echo "creating worker..."
+    buildbot-worker create-worker --umask=0o22 --no-logrotate worker bbmaster:9989 $WORKER_NAME $(python3 -c "import hmac, hashlib; print(hmac.new(bytes('$BUILDBOT_SECRET', 'utf-8'), bytes('$WORKER_NAME', 'utf-8'), hashlib.sha512).hexdigest())")
+    echo $WORKER_ADMIN > worker/info/admin
+    echo $WORKER_INFO > worker/info/host
+    uname -a >> worker/info/host
+fi
+
+rm -f worker/twistd.pid worker/twistd.log
+
+# make sure /sys is rw (I HAVE NO IDEA but it helps rpm builders)
+mount -o remount,rw /sys
+
+# run in a clean env, don't leak secrets
+exec env -i -- /bin/bash -c "source /etc/profile; export HOME=`pwd`; exec buildbot-worker start --nodaemon worker"
diff --git a/buildbot/master/master.cfg b/buildbot/master/master.cfg
index 00c7814..a262f0d 100644
--- a/buildbot/master/master.cfg
+++ b/buildbot/master/master.cfg
@@ -52,9 +52,9 @@ class BaseConfig:
     DEFAULT_CLIENT_JAR_VER = "1.15"
 
     ALL_BUILDERS = ['src', 'render', 'win32',
-                    'win64', 'deb32', 'deb64', 'centos7-64']
+                    'win64', 'deb32', 'deb64', 'centos7-64', 'centos8-64']
     ENABLED_WORKERS = ['diax-stretch-64',
-                       'diax-stretch-32', 'ec2-windows', 'diax-centos7-64']
+                       'diax-stretch-32', 'ec2-windows', 'diax-centos7-64', 'diax-centos8-64']
 
     # high-level worker list
     # workers[name] = [... list of builders ...]
@@ -62,6 +62,7 @@ class BaseConfig:
         'diax-stretch-64': ['src', 'render', 'deb64'],
         'diax-stretch-32': ['src', 'render', 'deb32'],
         'diax-centos7-64': ['centos7-64'],
+        'diax-centos8-64': ['centos8-64'],
         'ec2-windows': ['win32', 'win64'],
     }
 
@@ -79,8 +80,8 @@ class DevConfig(BaseConfig):
     BASE_URL = "http://localhost:8020"
     ENABLE_GITHUB_AUTH = os.environ.get("DISABLE_GITHUB_AUTH") is None
 
-    ALL_BUILDERS = ['src', 'render', 'deb32', 'deb64', 'centos7-64']
-    ENABLED_WORKERS = ['diax-stretch-64', 'diax-stretch-32', 'diax-centos7-64']
+    ALL_BUILDERS = ['src', 'render', 'deb32', 'deb64', 'centos7-64', 'centos8-64']
+    ENABLED_WORKERS = ['diax-stretch-64', 'diax-stretch-32', 'diax-centos7-64', 'diax-centos8-64']
 
 
 ENV = os.environ.get("ENV", "production")
@@ -563,7 +564,7 @@ def rpm(rpmbase, mockbase, mockconfig, rpmarch, mockarch):
     yield MasterShellCommand(command=["/root/rpmsign.sh", upload_dest(".rpm")], name="sign package", description="signing", descriptionDone="signed")
 
     # link the new rpm into the repo
-    system_map = {'centos6': '6', 'centos7': '7'}
+    system_map = {'centos6': '6', 'centos7': '7', 'centos8': '8'}
     rpm_package_area = RPM_REPO / system_map[rpmbase] / rpmarch / "packages"
 
     yield MasterShellCommand(command=["ln", "-f", upload_dest(".rpm"), str(rpm_package_area)], name="link into repo", doStepIf=is_release_build, description="linking into repo", descriptionDone="linked into repo")
@@ -584,6 +585,10 @@ def centos6_64():
 def centos7_64():
     yield rpm('centos7', 'el7', 'epel-7', 'x86_64', 'x86_64')
 
+@builder(locks=[rpm_build_lock.access('exclusive')])
+def centos8_64():
+    yield rpm('centos8', 'el8', 'epel-8', 'x86_64', 'x86_64')
+
 
 class RenderDirUpload(DirectoryUpload):
     def __init__(self, *args, **kwargs):
diff --git a/buildbot/repos/rpm/control/centos8/Minecraft-Overviewer.spec b/buildbot/repos/rpm/control/centos8/Minecraft-Overviewer.spec
new file mode 100644
index 0000000..fc9a755
--- /dev/null
+++ b/buildbot/repos/rpm/control/centos8/Minecraft-Overviewer.spec
@@ -0,0 +1,39 @@
+Summary: Generates large resolution images of a Minecraft map.
+Name: Minecraft-Overviewer
+Version: {VERSION}
+Release: 1%{?dist}
+Source0: %{name}-%{version}.tar.gz
+License: GNU General Public License v3
+Group: Development/Libraries
+BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-buildroot
+Vendor: Andrew Brown <brownan@gmail.com>
+Url: https://overviewer.org/
+Requires: python3-pillow python3-numpy
+BuildRequires: wget python36-devel python3-numpy
+
+%description
+The Minecraft Overviewer is a command-line tool for rendering high-resolution
+maps of Minecraft worlds. It generates a set of static html and image files and
+uses the Leaflet javascript library to display a nice interactive map.
+
+%prep
+wget -P %{_tmppath} https://github.com/python-pillow/Pillow/archive/5.1.0.tar.gz
+tar -xf %{_tmppath}/5.1.0.tar.gz --directory %{_tmppath}
+%setup -n %{name}
+
+%build
+env CFLAGS="$RPM_OPT_FLAGS" PIL_INCLUDE_DIR=%{_tmppath}/Pillow-5.1.0/src/libImaging %{__python3} setup.py build
+
+%install
+%{__python3} setup.py install -O1 --root=%{buildroot}
+rm -rf %{buildroot}%{_defaultdocdir}/minecraft-overviewer
+
+%clean
+rm -rf %{buildroot}
+
+%files
+%defattr(-,root,root)
+%{python3_sitearch}/Minecraft_Overviewer-*-*.egg-info
+%{python3_sitearch}/overviewer_core
+%{_bindir}/overviewer.py
+%doc README.rst COPYING.txt sample_config.py
diff --git a/buildbot/repos/rpm/repo/Makefile b/buildbot/repos/rpm/repo/Makefile
index 7d6acb0..3554dca 100644
--- a/buildbot/repos/rpm/repo/Makefile
+++ b/buildbot/repos/rpm/repo/Makefile
@@ -1,7 +1,7 @@
 
 .PHONY : all
 
-all : 6/i386.repo 6/x86_64.repo 7/i386.repo 7/x86_64.repo
+all : 6/i386.repo 6/x86_64.repo 7/i386.repo 7/x86_64.repo 8/x86_64.repo
 
 %.repo :
 	createrepo -s sha $*
diff --git a/docker-compose.yml b/docker-compose.yml
index 3a65443..1ddc9f7 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -61,6 +61,15 @@ services:
       - apparmor:unconfined
     links:
       - bbmaster
+  bbcentos864:
+    build: buildbot/docker-builders/centos8-64
+    env_file: confidential.env
+    cap_add: 
+      - SYS_ADMIN
+    security_opt:
+      - apparmor:unconfined
+    links:
+      - bbmaster
   bbstretch64:
     build: buildbot/docker-builders/stretch-64
     env_file: confidential.env
diff --git a/flask/overviewer/models.py b/flask/overviewer/models.py
index 278177d..c7787a3 100644
--- a/flask/overviewer/models.py
+++ b/flask/overviewer/models.py
@@ -1,6 +1,6 @@
 from flask import url_for, current_app, session
 from flask_sqlalchemy import SQLAlchemy
-from werkzeug import secure_filename
+from werkzeug.utils import secure_filename
 import os.path
 import os
 import hashlib
diff --git a/flask/requirements.txt b/flask/requirements.txt
index 0d53f68..992cbfa 100644
--- a/flask/requirements.txt
+++ b/flask/requirements.txt
@@ -3,13 +3,13 @@ gunicorn==19.9.0
 Flask-SQLAlchemy==2.3.2
 Flask-Migrate==2.4.0
 GitHub-Flask==3.2.0
-Flask-WTF==0.14.2
+Flask-WTF==0.14.3
 unidecode==0.04.1
 Flask-Markdown==0.3
 pytoml==0.1.20
 Pillow==6.2.0
 requests==2.21.0
-Flask-Caching==1.0.0
+Flask-Caching==1.8.0
 psycopg2==2.7.7
 Flask-DebugToolbar==0.10.1
 Flask-Script==2.0.6