diff --git a/poetry.lock b/poetry.lock
index 9b41909..0ad6c30 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,40 +1,43 @@
 [[package]]
-category = "main"
-description = "Low-level AMQP client for Python (fork of amqplib)."
 name = "amqp"
+version = "2.5.2"
+description = "Low-level AMQP client for Python (fork of amqplib)."
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "2.5.2"
 
 [package.dependencies]
 vine = ">=1.1.3,<5.0.0a1"
 
 [[package]]
-category = "dev"
-description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
 name = "appdirs"
+version = "1.4.3"
+description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
+category = "dev"
 optional = false
 python-versions = "*"
-version = "1.4.3"
 
 [[package]]
-category = "main"
-description = "ASGI specs, helper code, and adapters"
 name = "asgiref"
+version = "3.4.1"
+description = "ASGI specs, helper code, and adapters"
+category = "main"
 optional = false
-python-versions = "*"
-version = "3.2.3"
+python-versions = ">=3.6"
+
+[package.dependencies]
+typing-extensions = {version = "*", markers = "python_version < \"3.8\""}
 
 [package.extras]
-tests = ["pytest (>=4.3.0,<4.4.0)", "pytest-asyncio (>=0.10.0,<0.11.0)"]
+tests = ["pytest", "pytest-asyncio", "mypy (>=0.800)"]
 
 [[package]]
-category = "dev"
-description = "Classes Without Boilerplate"
 name = "attrs"
+version = "19.3.0"
+description = "Classes Without Boilerplate"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "19.3.0"
 
 [package.extras]
 azure-pipelines = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "pytest-azurepipelines"]
@@ -43,20 +46,20 @@ docs = ["sphinx", "zope.interface"]
 tests = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
 
 [[package]]
-category = "main"
-description = "Python multiprocessing fork with improvements and bugfixes"
 name = "billiard"
+version = "3.6.2.0"
+description = "Python multiprocessing fork with improvements and bugfixes"
+category = "main"
 optional = false
 python-versions = "*"
-version = "3.6.2.0"
 
 [[package]]
-category = "dev"
-description = "The uncompromising code formatter."
 name = "black"
+version = "19.10b0"
+description = "The uncompromising code formatter."
+category = "dev"
 optional = false
 python-versions = ">=3.6"
-version = "19.10b0"
 
 [package.dependencies]
 appdirs = "*"
@@ -71,12 +74,12 @@ typed-ast = ">=1.4.0"
 d = ["aiohttp (>=3.3.2)", "aiohttp-cors"]
 
 [[package]]
-category = "main"
-description = "Distributed Task Queue."
 name = "celery"
+version = "4.4.0"
+description = "Distributed Task Queue."
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*,"
-version = "4.4.0"
 
 [package.dependencies]
 billiard = ">=3.6.1,<4.0"
@@ -87,11 +90,11 @@ vine = "1.3.0"
 [package.extras]
 arangodb = ["pyArango (>=1.3.2)"]
 auth = ["cryptography"]
-azureblockblob = ["azure-storage (0.36.0)", "azure-common (1.1.5)", "azure-storage-common (1.1.0)"]
+azureblockblob = ["azure-storage (==0.36.0)", "azure-common (==1.1.5)", "azure-storage-common (==1.1.0)"]
 brotli = ["brotli (>=1.0.0)", "brotlipy (>=0.7.0)"]
 cassandra = ["cassandra-driver"]
 consul = ["python-consul"]
-cosmosdbsql = ["pydocumentdb (2.3.2)"]
+cosmosdbsql = ["pydocumentdb (==2.3.2)"]
 couchbase = ["couchbase", "couchbase-cffi"]
 couchdb = ["pycouchdb"]
 django = ["Django (>=1.11)"]
@@ -102,7 +105,7 @@ gevent = ["gevent"]
 librabbitmq = ["librabbitmq (>=1.5.0)"]
 lzma = ["backports.lzma"]
 memcache = ["pylibmc"]
-mongodb = ["pymongo (>=3.3.0)"]
+mongodb = ["pymongo[srv] (>=3.3.0)"]
 msgpack = ["msgpack"]
 pymemcache = ["python-memcached"]
 pyro = ["pyro4"]
@@ -119,58 +122,58 @@ zookeeper = ["kazoo (>=1.3.1)"]
 zstd = ["zstandard"]
 
 [[package]]
-category = "main"
-description = "Python package for providing Mozilla's CA Bundle."
 name = "certifi"
+version = "2019.11.28"
+description = "Python package for providing Mozilla's CA Bundle."
+category = "main"
 optional = false
 python-versions = "*"
-version = "2019.11.28"
 
 [[package]]
-category = "main"
-description = "Universal encoding detector for Python 2 and 3"
 name = "chardet"
+version = "3.0.4"
+description = "Universal encoding detector for Python 2 and 3"
+category = "main"
 optional = false
 python-versions = "*"
-version = "3.0.4"
 
 [[package]]
-category = "dev"
-description = "Composable command line interface toolkit"
 name = "click"
+version = "7.0"
+description = "Composable command line interface toolkit"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "7.0"
 
 [[package]]
-category = "dev"
-description = "Code coverage measurement for Python"
 name = "coverage"
+version = "5.0.3"
+description = "Code coverage measurement for Python"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
-version = "5.0.3"
 
 [package.extras]
 toml = ["toml"]
 
 [[package]]
-category = "main"
-description = "XML bomb protection for Python stdlib modules"
 name = "defusedxml"
+version = "0.6.0"
+description = "XML bomb protection for Python stdlib modules"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "0.6.0"
 
 [[package]]
-category = "main"
-description = "A high-level Python Web framework that encourages rapid development and clean, pragmatic design."
 name = "django"
+version = "3.1.14"
+description = "A high-level Python Web framework that encourages rapid development and clean, pragmatic design."
+category = "main"
 optional = false
 python-versions = ">=3.6"
-version = "3.0.3"
 
 [package.dependencies]
-asgiref = ">=3.2,<4.0"
+asgiref = ">=3.2.10,<4"
 pytz = "*"
 sqlparse = ">=0.2.2"
 
@@ -179,12 +182,12 @@ argon2 = ["argon2-cffi (>=16.1.0)"]
 bcrypt = ["bcrypt"]
 
 [[package]]
-category = "main"
-description = "Integrated set of Django applications addressing authentication, registration, account management as well as 3rd party (social) account authentication."
 name = "django-allauth"
+version = "0.41.0"
+description = "Integrated set of Django applications addressing authentication, registration, account management as well as 3rd party (social) account authentication."
+category = "main"
 optional = false
 python-versions = "*"
-version = "0.41.0"
 
 [package.dependencies]
 Django = ">=2.0"
@@ -193,20 +196,20 @@ requests = "*"
 requests-oauthlib = ">=0.3.0"
 
 [[package]]
-category = "dev"
-description = "Discover and load entry points from installed packages."
 name = "entrypoints"
+version = "0.3"
+description = "Discover and load entry points from installed packages."
+category = "dev"
 optional = false
 python-versions = ">=2.7"
-version = "0.3"
 
 [[package]]
-category = "dev"
-description = "the modular source code checker: pep8, pyflakes and co"
 name = "flake8"
+version = "3.7.9"
+description = "the modular source code checker: pep8, pyflakes and co"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "3.7.9"
 
 [package.dependencies]
 entrypoints = ">=0.3.0,<0.4.0"
@@ -215,15 +218,12 @@ pycodestyle = ">=2.5.0,<2.6.0"
 pyflakes = ">=2.1.0,<2.2.0"
 
 [[package]]
-category = "main"
-description = "WSGI HTTP Server for UNIX"
 name = "gunicorn"
+version = "20.0.4"
+description = "WSGI HTTP Server for UNIX"
+category = "main"
 optional = false
 python-versions = ">=3.4"
-version = "20.0.4"
-
-[package.dependencies]
-setuptools = ">=3.0"
 
 [package.extras]
 eventlet = ["eventlet (>=0.9.7)"]
@@ -232,21 +232,20 @@ setproctitle = ["setproctitle"]
 tornado = ["tornado (>=0.2)"]
 
 [[package]]
-category = "main"
-description = "Internationalized Domain Names in Applications (IDNA)"
 name = "idna"
+version = "2.8"
+description = "Internationalized Domain Names in Applications (IDNA)"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.8"
 
 [[package]]
-category = "main"
-description = "Read metadata from Python packages"
-marker = "python_version < \"3.8\""
 name = "importlib-metadata"
+version = "1.5.0"
+description = "Read metadata from Python packages"
+category = "main"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
-version = "1.5.0"
 
 [package.dependencies]
 zipp = ">=0.5"
@@ -256,19 +255,16 @@ docs = ["sphinx", "rst.linker"]
 testing = ["packaging", "importlib-resources"]
 
 [[package]]
-category = "main"
-description = "Messaging library for Python."
 name = "kombu"
+version = "4.6.7"
+description = "Messaging library for Python."
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "4.6.7"
 
 [package.dependencies]
 amqp = ">=2.5.2,<2.6"
-
-[package.dependencies.importlib-metadata]
-python = "<3.8"
-version = ">=0.18"
+importlib-metadata = {version = ">=0.18", markers = "python_version < \"3.8\""}
 
 [package.extras]
 azureservicebus = ["azure-servicebus (>=0.21.1)"]
@@ -282,25 +278,25 @@ qpid = ["qpid-python (>=0.26)", "qpid-tools (>=0.26)"]
 redis = ["redis (>=3.3.11)"]
 slmq = ["softlayer-messaging (>=1.0.3)"]
 sqlalchemy = ["sqlalchemy"]
-sqs = ["boto3 (>=1.4.4)", "pycurl (7.43.0.2)"]
+sqs = ["boto3 (>=1.4.4)", "pycurl (==7.43.0.2)"]
 yaml = ["PyYAML (>=3.10)"]
 zookeeper = ["kazoo (>=1.3.1)"]
 
 [[package]]
-category = "dev"
-description = "McCabe checker, plugin for flake8"
 name = "mccabe"
+version = "0.6.1"
+description = "McCabe checker, plugin for flake8"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.6.1"
 
 [[package]]
-category = "main"
-description = "A generic, spec-compliant, thorough implementation of the OAuth request-signing logic"
 name = "oauthlib"
+version = "3.1.0"
+description = "A generic, spec-compliant, thorough implementation of the OAuth request-signing logic"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "3.1.0"
 
 [package.extras]
 rsa = ["cryptography"]
@@ -308,79 +304,79 @@ signals = ["blinker"]
 signedtoken = ["cryptography", "pyjwt (>=1.0.0)"]
 
 [[package]]
-category = "dev"
-description = "Utility library for gitignore style pattern matching of file paths."
 name = "pathspec"
+version = "0.7.0"
+description = "Utility library for gitignore style pattern matching of file paths."
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "0.7.0"
 
 [[package]]
-category = "main"
-description = "Python Imaging Library (Fork)"
 name = "pillow"
+version = "7.0.0"
+description = "Python Imaging Library (Fork)"
+category = "main"
 optional = false
 python-versions = ">=3.5"
-version = "7.0.0"
 
 [[package]]
-category = "main"
-description = "psycopg2 - Python-PostgreSQL Database Adapter"
 name = "psycopg2"
+version = "2.8.4"
+description = "psycopg2 - Python-PostgreSQL Database Adapter"
+category = "main"
 optional = false
 python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*"
-version = "2.8.4"
 
 [[package]]
-category = "dev"
-description = "Python style guide checker"
 name = "pycodestyle"
+version = "2.5.0"
+description = "Python style guide checker"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.5.0"
 
 [[package]]
-category = "dev"
-description = "passive checker of Python programs"
 name = "pyflakes"
+version = "2.1.1"
+description = "passive checker of Python programs"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.1.1"
 
 [[package]]
-category = "main"
-description = "OpenID support for modern servers and consumers."
 name = "python3-openid"
+version = "3.1.0"
+description = "OpenID support for modern servers and consumers."
+category = "main"
 optional = false
 python-versions = "*"
-version = "3.1.0"
 
 [package.dependencies]
 defusedxml = "*"
 
 [[package]]
-category = "main"
-description = "World timezone definitions, modern and historical"
 name = "pytz"
+version = "2019.3"
+description = "World timezone definitions, modern and historical"
+category = "main"
 optional = false
 python-versions = "*"
-version = "2019.3"
 
 [[package]]
-category = "dev"
-description = "Alternative regular expression module, to replace re."
 name = "regex"
+version = "2020.1.8"
+description = "Alternative regular expression module, to replace re."
+category = "dev"
 optional = false
 python-versions = "*"
-version = "2020.1.8"
 
 [[package]]
-category = "main"
-description = "Python HTTP for Humans."
 name = "requests"
+version = "2.22.0"
+description = "Python HTTP for Humans."
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "2.22.0"
 
 [package.dependencies]
 certifi = ">=2017.4.17"
@@ -390,84 +386,92 @@ urllib3 = ">=1.21.1,<1.25.0 || >1.25.0,<1.25.1 || >1.25.1,<1.26"
 
 [package.extras]
 security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)", "idna (>=2.0.0)"]
-socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7)", "win-inet-pton"]
+socks = ["PySocks (>=1.5.6,!=1.5.7)", "win-inet-pton"]
 
 [[package]]
-category = "main"
-description = "OAuthlib authentication support for Requests."
 name = "requests-oauthlib"
+version = "1.3.0"
+description = "OAuthlib authentication support for Requests."
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.3.0"
 
 [package.dependencies]
 oauthlib = ">=3.0.0"
 requests = ">=2.0.0"
 
 [package.extras]
-rsa = ["oauthlib (>=3.0.0)"]
+rsa = ["oauthlib[signedtoken] (>=3.0.0)"]
 
 [[package]]
-category = "main"
-description = "Non-validating SQL parser"
 name = "sqlparse"
+version = "0.3.0"
+description = "Non-validating SQL parser"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "0.3.0"
 
 [[package]]
-category = "dev"
-description = "Python Library for Tom's Obvious, Minimal Language"
 name = "toml"
+version = "0.10.0"
+description = "Python Library for Tom's Obvious, Minimal Language"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.10.0"
 
 [[package]]
-category = "dev"
-description = "a fork of Python 2 and 3 ast modules with type comment support"
 name = "typed-ast"
+version = "1.4.1"
+description = "a fork of Python 2 and 3 ast modules with type comment support"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "1.4.1"
 
 [[package]]
+name = "typing-extensions"
+version = "4.1.1"
+description = "Backported and Experimental Type Hints for Python 3.6+"
 category = "main"
-description = "HTTP library with thread-safe connection pooling, file post, and more."
+optional = false
+python-versions = ">=3.6"
+
+[[package]]
 name = "urllib3"
+version = "1.25.8"
+description = "HTTP library with thread-safe connection pooling, file post, and more."
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
-version = "1.25.8"
 
 [package.extras]
 brotli = ["brotlipy (>=0.6.0)"]
 secure = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "certifi", "ipaddress"]
-socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7,<2.0)"]
+socks = ["PySocks (>=1.5.6,!=1.5.7,<2.0)"]
 
 [[package]]
-category = "main"
-description = "Promises, promises, promises."
 name = "vine"
+version = "1.3.0"
+description = "Promises, promises, promises."
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.3.0"
 
 [[package]]
-category = "main"
-description = "Backport of pathlib-compatible object wrapper for zip files"
-marker = "python_version < \"3.8\""
 name = "zipp"
+version = "2.2.0"
+description = "Backport of pathlib-compatible object wrapper for zip files"
+category = "main"
 optional = false
 python-versions = ">=3.6"
-version = "2.2.0"
 
 [package.extras]
 docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
 testing = ["jaraco.itertools"]
 
 [metadata]
-content-hash = "4f1cc826e75a493005d4d741752d75fc89ea07d3b4e4bbfc22e3eee40df23c5d"
+lock-version = "1.1"
 python-versions = "^3.6"
+content-hash = "25314a0aef0a6785859c39918ee4f1741b972f269265ce1d875b6a19d5e84adc"
 
 [metadata.files]
 amqp = [
@@ -479,8 +483,8 @@ appdirs = [
     {file = "appdirs-1.4.3.tar.gz", hash = "sha256:9e5896d1372858f8dd3344faf4e5014d21849c756c8d5701f78f8a103b372d92"},
 ]
 asgiref = [
-    {file = "asgiref-3.2.3-py2.py3-none-any.whl", hash = "sha256:ea448f92fc35a0ef4b1508f53a04c4670255a3f33d22a81c8fc9c872036adbe5"},
-    {file = "asgiref-3.2.3.tar.gz", hash = "sha256:7e06d934a7718bf3975acbf87780ba678957b87c7adc056f13b6215d610695a0"},
+    {file = "asgiref-3.4.1-py3-none-any.whl", hash = "sha256:ffc141aa908e6f175673e7b1b3b7af4fdb0ecb738fc5c8b88f69f055c2415214"},
+    {file = "asgiref-3.4.1.tar.gz", hash = "sha256:4ef1ab46b484e3c706329cedeff284a5d40824200638503f5768edb6de7d58e9"},
 ]
 attrs = [
     {file = "attrs-19.3.0-py2.py3-none-any.whl", hash = "sha256:08a96c641c3a74e44eb59afb61a24f2cb9f4d7188748e76ba4bb5edfa3cb7d1c"},
@@ -548,8 +552,8 @@ defusedxml = [
     {file = "defusedxml-0.6.0.tar.gz", hash = "sha256:f684034d135af4c6cbb949b8a4d2ed61634515257a67299e5f940fbaa34377f5"},
 ]
 django = [
-    {file = "Django-3.0.3-py3-none-any.whl", hash = "sha256:c91c91a7ad6ef67a874a4f76f58ba534f9208412692a840e1d125eb5c279cb0a"},
-    {file = "Django-3.0.3.tar.gz", hash = "sha256:2f1ba1db8648484dd5c238fb62504777b7ad090c81c5f1fd8d5eb5ec21b5f283"},
+    {file = "Django-3.1.14-py3-none-any.whl", hash = "sha256:0fabc786489af16ad87a8c170ba9d42bfd23f7b699bd5ef05675864e8d012859"},
+    {file = "Django-3.1.14.tar.gz", hash = "sha256:72a4a5a136a214c39cf016ccdd6b69e2aa08c7479c66d93f3a9b5e4bb9d8a347"},
 ]
 django-allauth = [
     {file = "django-allauth-0.41.0.tar.gz", hash = "sha256:7ab91485b80d231da191d5c7999ba93170ef1bf14ab6487d886598a1ad03e1d8"},
@@ -694,21 +698,34 @@ typed-ast = [
     {file = "typed_ast-1.4.1-cp36-cp36m-macosx_10_9_x86_64.whl", hash = "sha256:269151951236b0f9a6f04015a9004084a5ab0d5f19b57de779f908621e7d8b75"},
     {file = "typed_ast-1.4.1-cp36-cp36m-manylinux1_i686.whl", hash = "sha256:24995c843eb0ad11a4527b026b4dde3da70e1f2d8806c99b7b4a7cf491612652"},
     {file = "typed_ast-1.4.1-cp36-cp36m-manylinux1_x86_64.whl", hash = "sha256:fe460b922ec15dd205595c9b5b99e2f056fd98ae8f9f56b888e7a17dc2b757e7"},
+    {file = "typed_ast-1.4.1-cp36-cp36m-manylinux2014_aarch64.whl", hash = "sha256:fcf135e17cc74dbfbc05894ebca928ffeb23d9790b3167a674921db19082401f"},
     {file = "typed_ast-1.4.1-cp36-cp36m-win32.whl", hash = "sha256:4e3e5da80ccbebfff202a67bf900d081906c358ccc3d5e3c8aea42fdfdfd51c1"},
     {file = "typed_ast-1.4.1-cp36-cp36m-win_amd64.whl", hash = "sha256:249862707802d40f7f29f6e1aad8d84b5aa9e44552d2cc17384b209f091276aa"},
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+typing-extensions = [
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 urllib3 = [
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diff --git a/pyproject.toml b/pyproject.toml
index d7ae507..56f9375 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ authors = ["Joonhyung Shin <tonyshin@kaist.ac.kr>"]
 
 [tool.poetry.dependencies]
 python = "^3.6"
-Django = "^3.0.3"
+Django = "^3.1.14"
 celery = "^4.4.0"
 Pillow = "^7.0.0"
 gunicorn = "^20.0.4"