diff --git a/yarn.lock b/yarn.lock
index 3ae660f..58fa7f8 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3,13 +3,14 @@
 
 
 "@slack/bolt@2.x":
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/@slack/bolt/-/bolt-2.0.1.tgz#f19ac1102964b0dd04f8aa480af266e8bd3b20f3"
-  integrity sha512-EOhsVTcgw/VGloblGBUMyt+ll1lTA2o0ZO9u5BKM00X+C6HHmg7S1ZAco61KFmvTZELuWInWEX1ye4fDGarfXg==
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/@slack/bolt/-/bolt-2.1.0.tgz#74a898c42e245754d53ce9d6dc0a5745366bc90f"
+  integrity sha512-omP1jAq6EQpiQ2apVjzzhyblFRUNBDHROcyks8hW/FuAVKygcVgy/302knjMKde2YxTHovvCg47sODPbnLTIrg==
   dependencies:
     "@slack/logger" "^2.0.0"
-    "@slack/types" "^1.5.0"
-    "@slack/web-api" "^5.8.0"
+    "@slack/oauth" "^1.1.0"
+    "@slack/types" "^1.6.0"
+    "@slack/web-api" "^5.9.0"
     "@types/express" "^4.16.1"
     "@types/node" ">=10"
     "@types/promise.allsettled" "^1.0.3"
@@ -27,15 +28,27 @@
   dependencies:
     "@types/node" ">=8.9.0"
 
-"@slack/types@^1.2.1", "@slack/types@^1.5.0":
-  version "1.5.0"
-  resolved "https://registry.yarnpkg.com/@slack/types/-/types-1.5.0.tgz#5c2cb0f718689266ff295aad33301d489272c842"
-  integrity sha512-oCYgatJYxHf9wE3tKXzOLeeTsF0ghX1TIcguNfVmO2V6NDe+cHAzZRglEOmJLdRINDS5gscAgSkeZpDhpKBeUA==
+"@slack/oauth@^1.1.0":
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/@slack/oauth/-/oauth-1.1.0.tgz#68967f3ae92941132bad773e263976ebd6d9fad5"
+  integrity sha512-v4yawvn9DCmWO0HXXnWxjmwVikLkoZKjCU042o6UES5u0FroYX8ozs+xWbueO8lb7YYqSKPsIX6A6nlbR4pUyA==
+  dependencies:
+    "@slack/logger" "^2.0.0"
+    "@slack/web-api" "^5.7.0"
+    "@types/jsonwebtoken" "^8.3.7"
+    "@types/node" ">=6.0.0"
+    jsonwebtoken "^8.5.1"
+    lodash.isstring "^4.0.1"
 
-"@slack/web-api@^5.8.0":
-  version "5.8.0"
-  resolved "https://registry.yarnpkg.com/@slack/web-api/-/web-api-5.8.0.tgz#32858ed22e6af7b825e8952ad8e60088bb04cc0b"
-  integrity sha512-lUMFM9jtdn+9Q0kHLegf5RjIgQlmb1PGWwWdTsc9mQ8PJu2BogI5ZttG8/tA6r2bX/C4bgXhd0JJ4syUR0AAhQ==
+"@slack/types@^1.2.1", "@slack/types@^1.6.0":
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/@slack/types/-/types-1.6.0.tgz#7b5f08db824d9853cbf6c2de1c08865ba6ce346f"
+  integrity sha512-SrrAD/ZxDN4szQ35V/mY2TvKSyGsUWP8def1C8NMg9AvdYG0VyaL5f+Dd6jw8STosMFXd3zqjekMowT9LB9/IQ==
+
+"@slack/web-api@^5.7.0", "@slack/web-api@^5.9.0":
+  version "5.9.0"
+  resolved "https://registry.yarnpkg.com/@slack/web-api/-/web-api-5.9.0.tgz#13ce1eecc405c3972e6037d54338344d7859a3b5"
+  integrity sha512-gIRvuA9wGtp4S/Zc+zfT59IaGHYzNxjob2QxoJlc3JZ3BLuPMa6Lw81YBV0xutJvUVFPX2ytW27KAUakvi5ZMA==
   dependencies:
     "@slack/logger" ">=1.0.0 <3.0.0"
     "@slack/types" "^1.2.1"
@@ -65,11 +78,12 @@
     "@types/node" "*"
 
 "@types/express-serve-static-core@*":
-  version "4.17.4"
-  resolved "https://registry.yarnpkg.com/@types/express-serve-static-core/-/express-serve-static-core-4.17.4.tgz#157c79c2d28b632d6418497c57c93185e392e444"
-  integrity sha512-dPs6CaRWxsfHbYDVU51VjEJaUJEcli4UI0fFMT4oWmgCvHj+j7oIxz5MLHVL0Rv++N004c21ylJNdWQvPkkb5w==
+  version "4.17.7"
+  resolved "https://registry.yarnpkg.com/@types/express-serve-static-core/-/express-serve-static-core-4.17.7.tgz#dfe61f870eb549dc6d7e12050901847c7d7e915b"
+  integrity sha512-EMgTj/DF9qpgLXyc+Btimg+XoH7A2liE8uKul8qSmMTHCeNYzydDKFdsJskDvw42UsesCnhO63dO0Grbj8J4Dw==
   dependencies:
     "@types/node" "*"
+    "@types/qs" "*"
     "@types/range-parser" "*"
 
 "@types/express@^4.16.1":
@@ -89,15 +103,22 @@
   dependencies:
     "@types/node" "*"
 
-"@types/mime@*":
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/@types/mime/-/mime-2.0.1.tgz#dc488842312a7f075149312905b5e3c0b054c79d"
-  integrity sha512-FwI9gX75FgVBJ7ywgnq/P7tw+/o1GUbtP0KzbtusLigAOgIgNISRK0ZPl4qertvXSIE8YbsVJueQ90cDt9YYyw==
+"@types/jsonwebtoken@^8.3.7":
+  version "8.5.0"
+  resolved "https://registry.yarnpkg.com/@types/jsonwebtoken/-/jsonwebtoken-8.5.0.tgz#2531d5e300803aa63279b232c014acf780c981c5"
+  integrity sha512-9bVao7LvyorRGZCw0VmH/dr7Og+NdjYSsKAxB43OQoComFbBgsEpoR9JW6+qSq/ogwVBg8GI2MfAlk4SYI4OLg==
+  dependencies:
+    "@types/node" "*"
 
-"@types/node@*", "@types/node@>=10", "@types/node@>=8.9.0":
-  version "13.11.1"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-13.11.1.tgz#49a2a83df9d26daacead30d0ccc8762b128d53c7"
-  integrity sha512-eWQGP3qtxwL8FGneRrC5DwrJLGN4/dH1clNTuLfN81HCrxVtxRjygDTUoZJ5ASlDEeo0ppYFQjQIlXhtXpOn6g==
+"@types/mime@*":
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/@types/mime/-/mime-2.0.2.tgz#857a118d8634c84bba7ae14088e4508490cd5da5"
+  integrity sha512-4kPlzbljFcsttWEq6aBW0OZe6BDajAmyvr2xknBG92tejQnvdGtT9+kXSZ580DqpxY9qG2xeQVF9Dq0ymUTo5Q==
+
+"@types/node@*", "@types/node@>=10", "@types/node@>=6.0.0", "@types/node@>=8.9.0":
+  version "14.0.5"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-14.0.5.tgz#3d03acd3b3414cf67faf999aed11682ed121f22b"
+  integrity sha512-90hiq6/VqtQgX8Sp0EzeIsv3r+ellbGj4URKj5j30tLlZvRUpnAe9YbYnjl3pJM93GyXU0tghHhvXHq+5rnCKA==
 
 "@types/p-queue@^2.3.2":
   version "2.3.2"
@@ -110,9 +131,9 @@
   integrity sha512-b/IFHHTkYkTqu41IH9UtpICwqrpKj2oNlb4KHPzFQDMiz+h1BgAeATeO0/XTph4+UkH9W2U0E4B4j64KWOovag==
 
 "@types/qs@*":
-  version "6.9.1"
-  resolved "https://registry.yarnpkg.com/@types/qs/-/qs-6.9.1.tgz#937fab3194766256ee09fcd40b781740758617e7"
-  integrity sha512-lhbQXx9HKZAPgBkISrBcmAcMpZsmpe/Cd/hY7LGZS5OfkySUBItnPZHgQPssWYUET8elF+yCFBbP1Q0RZPTdaw==
+  version "6.9.3"
+  resolved "https://registry.yarnpkg.com/@types/qs/-/qs-6.9.3.tgz#b755a0934564a200d3efdf88546ec93c369abd03"
+  integrity sha512-7s9EQWupR1fTc2pSMtXRQ9w9gLOcrJn+h7HOXw4evxyvVqMi4f+q7d2tnFe3ng3SNHjtK+0EzGMGFUQX4/AQRA==
 
 "@types/range-parser@*":
   version "1.2.3"
@@ -125,9 +146,9 @@
   integrity sha512-wWKOClTTiizcZhXnPY4wikVAwmdYHp8q6DmC+EJUzAMsycb7HB32Kh9RN4+0gExjmPmZSAQjgURXIGATPegAvA==
 
 "@types/serve-static@*":
-  version "1.13.3"
-  resolved "https://registry.yarnpkg.com/@types/serve-static/-/serve-static-1.13.3.tgz#eb7e1c41c4468272557e897e9171ded5e2ded9d1"
-  integrity sha512-oprSwp094zOglVrXdlo/4bAHtKTAxX6VT8FOZlBKrmyLbNvE1zxZyJ6yikMVtHIvwP45+ZQGJn+FdXGKTozq0g==
+  version "1.13.4"
+  resolved "https://registry.yarnpkg.com/@types/serve-static/-/serve-static-1.13.4.tgz#6662a93583e5a6cabca1b23592eb91e12fa80e7c"
+  integrity sha512-jTDt0o/YbpNwZbQmE/+2e+lfjJEJJR0I3OFaKQKPWkASkCoW3i6fsUnqudSMcNAfbtmADGu8f4MV4q+GqULmug==
   dependencies:
     "@types/express-serve-static-core" "*"
     "@types/mime" "*"
@@ -203,6 +224,11 @@ brace-expansion@^1.1.7:
     balanced-match "^1.0.0"
     concat-map "0.0.1"
 
+buffer-equal-constant-time@1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/buffer-equal-constant-time/-/buffer-equal-constant-time-1.0.1.tgz#f8e71132f7ffe6e01a5c9697a4c6f3e48d5cc819"
+  integrity sha1-+OcRMvf/5uAaXJaXpMbz5I1cyBk=
+
 bytes@3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/bytes/-/bytes-3.1.0.tgz#f6cf7933a360e0588fa9fde85651cdc7f805d1f6"
@@ -293,6 +319,13 @@ doublearray@0.0.2:
   resolved "https://registry.yarnpkg.com/doublearray/-/doublearray-0.0.2.tgz#63186fe8d34413276d3621f6aa0ec5f79e227ef9"
   integrity sha1-Yxhv6NNEEydtNiH2qg7F954ifvk=
 
+ecdsa-sig-formatter@1.0.11:
+  version "1.0.11"
+  resolved "https://registry.yarnpkg.com/ecdsa-sig-formatter/-/ecdsa-sig-formatter-1.0.11.tgz#ae0f0fa2d85045ef14a817daa3ce9acd0489e5bf"
+  integrity sha512-nagl3RYrbNv6kQkeJIpt6NJZy8twLB/2vtz6yN9Z4vRKHN4/QZJIEbqohALSgwKdnksuY3k5Addp5lg8sVoVcQ==
+  dependencies:
+    safe-buffer "^5.0.1"
+
 ee-first@1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/ee-first/-/ee-first-1.1.1.tgz#590c61156b0ae2f4f0255732a158b266bc56b21d"
@@ -602,6 +635,39 @@ iterate-value@^1.0.0:
     es-get-iterator "^1.0.2"
     iterate-iterator "^1.0.1"
 
+jsonwebtoken@^8.5.1:
+  version "8.5.1"
+  resolved "https://registry.yarnpkg.com/jsonwebtoken/-/jsonwebtoken-8.5.1.tgz#00e71e0b8df54c2121a1f26137df2280673bcc0d"
+  integrity sha512-XjwVfRS6jTMsqYs0EsuJ4LGxXV14zQybNd4L2r0UvbVnSF9Af8x7p5MzbJ90Ioz/9TI41/hTCvznF/loiSzn8w==
+  dependencies:
+    jws "^3.2.2"
+    lodash.includes "^4.3.0"
+    lodash.isboolean "^3.0.3"
+    lodash.isinteger "^4.0.4"
+    lodash.isnumber "^3.0.3"
+    lodash.isplainobject "^4.0.6"
+    lodash.isstring "^4.0.1"
+    lodash.once "^4.0.0"
+    ms "^2.1.1"
+    semver "^5.6.0"
+
+jwa@^1.4.1:
+  version "1.4.1"
+  resolved "https://registry.yarnpkg.com/jwa/-/jwa-1.4.1.tgz#743c32985cb9e98655530d53641b66c8645b039a"
+  integrity sha512-qiLX/xhEEFKUAJ6FiBMbes3w9ATzyk5W7Hvzpa/SLYdxNtng+gcurvrI7TbACjIXlsJyr05/S1oUhZrc63evQA==
+  dependencies:
+    buffer-equal-constant-time "1.0.1"
+    ecdsa-sig-formatter "1.0.11"
+    safe-buffer "^5.0.1"
+
+jws@^3.2.2:
+  version "3.2.2"
+  resolved "https://registry.yarnpkg.com/jws/-/jws-3.2.2.tgz#001099f3639468c9414000e99995fa52fb478304"
+  integrity sha512-YHlZCB6lMTllWDtSPHz/ZXTsi8S00usEV6v1tjq8tOUZzw7DpSDWVXjXDre6ed1w/pd495ODpHZYSdkRTsa0HA==
+  dependencies:
+    jwa "^1.4.1"
+    safe-buffer "^5.0.1"
+
 kuromoji@0.1.x:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/kuromoji/-/kuromoji-0.1.2.tgz#293f0d6706df006112137980588d5daac26d0790"
@@ -611,6 +677,41 @@ kuromoji@0.1.x:
     doublearray "0.0.2"
     zlibjs "^0.3.1"
 
+lodash.includes@^4.3.0:
+  version "4.3.0"
+  resolved "https://registry.yarnpkg.com/lodash.includes/-/lodash.includes-4.3.0.tgz#60bb98a87cb923c68ca1e51325483314849f553f"
+  integrity sha1-YLuYqHy5I8aMoeUTJUgzFISfVT8=
+
+lodash.isboolean@^3.0.3:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/lodash.isboolean/-/lodash.isboolean-3.0.3.tgz#6c2e171db2a257cd96802fd43b01b20d5f5870f6"
+  integrity sha1-bC4XHbKiV82WgC/UOwGyDV9YcPY=
+
+lodash.isinteger@^4.0.4:
+  version "4.0.4"
+  resolved "https://registry.yarnpkg.com/lodash.isinteger/-/lodash.isinteger-4.0.4.tgz#619c0af3d03f8b04c31f5882840b77b11cd68343"
+  integrity sha1-YZwK89A/iwTDH1iChAt3sRzWg0M=
+
+lodash.isnumber@^3.0.3:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/lodash.isnumber/-/lodash.isnumber-3.0.3.tgz#3ce76810c5928d03352301ac287317f11c0b1ffc"
+  integrity sha1-POdoEMWSjQM1IwGsKHMX8RwLH/w=
+
+lodash.isplainobject@^4.0.6:
+  version "4.0.6"
+  resolved "https://registry.yarnpkg.com/lodash.isplainobject/-/lodash.isplainobject-4.0.6.tgz#7c526a52d89b45c45cc690b88163be0497f550cb"
+  integrity sha1-fFJqUtibRcRcxpC4gWO+BJf1UMs=
+
+lodash.isstring@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/lodash.isstring/-/lodash.isstring-4.0.1.tgz#d527dfb5456eca7cc9bb95d5daeaf88ba54a5451"
+  integrity sha1-1SfftUVuynzJu5XV2ur4i6VKVFE=
+
+lodash.once@^4.0.0:
+  version "4.1.1"
+  resolved "https://registry.yarnpkg.com/lodash.once/-/lodash.once-4.1.1.tgz#0dd3971213c7c56df880977d504c88fb471a97ac"
+  integrity sha1-DdOXEhPHxW34gJd9UEyI+0cal6w=
+
 lodash@^4.17.14:
   version "4.17.15"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
@@ -631,17 +732,17 @@ methods@~1.1.2:
   resolved "https://registry.yarnpkg.com/methods/-/methods-1.1.2.tgz#5529a4d67654134edcc5266656835b0f851afcee"
   integrity sha1-VSmk1nZUE07cxSZmVoNbD4Ua/O4=
 
-mime-db@1.43.0:
-  version "1.43.0"
-  resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.43.0.tgz#0a12e0502650e473d735535050e7c8f4eb4fae58"
-  integrity sha512-+5dsGEEovYbT8UY9yD7eE4XTc4UwJ1jBYlgaQQF38ENsKR3wj/8q8RFZrF9WIZpB2V1ArTVFUva8sAul1NzRzQ==
+mime-db@1.44.0:
+  version "1.44.0"
+  resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.44.0.tgz#fa11c5eb0aca1334b4233cb4d52f10c5a6272f92"
+  integrity sha512-/NOTfLrsPBVeH7YtFPgsVWveuL+4SjjYxaQ1xtM1KMFj7HdxlBlxeyNLzhyJVx7r4rZGJAZ/6lkKCitSc/Nmpg==
 
 mime-types@^2.1.12, mime-types@~2.1.24:
-  version "2.1.26"
-  resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.26.tgz#9c921fc09b7e149a65dfdc0da4d20997200b0a06"
-  integrity sha512-01paPWYgLrkqAyrlDorC1uDwl2p3qZT7yl806vW7DvDoxwXi46jsjFbg+WdwotBIk6/MbEhO/dh5aZ5sNj/dWQ==
+  version "2.1.27"
+  resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.27.tgz#47949f98e279ea53119f5722e0f34e529bec009f"
+  integrity sha512-JIhqnCasI9yD+SsmkquHBxTSEuZdQX5BuQnS2Vc7puQQQ+8yiP5AY5uWhpdv4YL4VM5c6iliiYWPgJ/nJQLp7w==
   dependencies:
-    mime-db "1.43.0"
+    mime-db "1.44.0"
 
 mime@1.6.0:
   version "1.6.0"
@@ -665,6 +766,11 @@ ms@2.1.1:
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.1.tgz#30a5864eb3ebb0a66f2ebe6d727af06a09d86e0a"
   integrity sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg==
 
+ms@^2.1.1:
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.2.tgz#d09d1f357b443f493382a8eb3ccd183872ae6009"
+  integrity sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==
+
 negotiator@0.6.2:
   version "0.6.2"
   resolved "https://registry.yarnpkg.com/negotiator/-/negotiator-0.6.2.tgz#feacf7ccf525a77ae9634436a64883ffeca346fb"
@@ -808,6 +914,11 @@ safe-buffer@5.1.2:
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"
   integrity sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==
 
+safe-buffer@^5.0.1:
+  version "5.2.1"
+  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.2.1.tgz#1eaf9fa9bdb1fdd4ec75f58f9cdb4e6b7827eec6"
+  integrity sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==
+
 "safer-buffer@>= 2.1.2 < 3":
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/safer-buffer/-/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
@@ -818,6 +929,11 @@ semver-compare@^1.0.0:
   resolved "https://registry.yarnpkg.com/semver-compare/-/semver-compare-1.0.0.tgz#0dee216a1c941ab37e9efb1788f6afc5ff5537fc"
   integrity sha1-De4hahyUGrN+nvsXiPavxf9VN/w=
 
+semver@^5.6.0:
+  version "5.7.1"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-5.7.1.tgz#a954f931aeba508d307bbf069eff0c01c96116f7"
+  integrity sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==
+
 send@0.17.1:
   version "0.17.1"
   resolved "https://registry.yarnpkg.com/send/-/send-0.17.1.tgz#c1d8b059f7900f7466dd4938bdc44e11ddb376c8"