diff --git a/package.json b/package.json
index 705a0cb..888deb5 100644
--- a/package.json
+++ b/package.json
@@ -85,7 +85,7 @@
     "lint-staged": "10.2.13",
     "nodemon": "2.0.4",
     "prettier": "2.1.0",
-    "ts-jest": "26.2.0",
+    "ts-jest": "26.4.2",
     "ts-node": "9.0.0",
     "yarnhook": "0.4.3"
   }
diff --git a/yarn.lock b/yarn.lock
index 8b76b25..035928f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1110,6 +1110,11 @@
     slash "^3.0.0"
     strip-ansi "^6.0.0"
 
+"@jest/create-cache-key-function@^26.5.0":
+  version "26.5.0"
+  resolved "https://registry.yarnpkg.com/@jest/create-cache-key-function/-/create-cache-key-function-26.5.0.tgz#1d07947adc51ea17766d9f0ccf5a8d6ea94c47dc"
+  integrity sha512-DJ+pEBUIqarrbv1W/C39f9YH0rJ4wsXZ/VC6JafJPlHW2HOucKceeaqTOQj9MEDQZjySxMLkOq5mfXZXNZcmWw==
+
 "@jest/environment@^26.3.0":
   version "26.3.0"
   resolved "https://registry.yarnpkg.com/@jest/environment/-/environment-26.3.0.tgz#e6953ab711ae3e44754a025f838bde1a7fd236a0"
@@ -1233,20 +1238,21 @@
     "@types/yargs" "^15.0.0"
     chalk "^3.0.0"
 
-"@jest/types@^26.1.0":
-  version "26.1.0"
-  resolved "https://registry.yarnpkg.com/@jest/types/-/types-26.1.0.tgz#f8afaaaeeb23b5cad49dd1f7779689941dcb6057"
-  integrity sha512-GXigDDsp6ZlNMhXQDeuy/iYCDsRIHJabWtDzvnn36+aqFfG14JmFV0e/iXxY4SP9vbXSiPNOWdehU5MeqrYHBQ==
+"@jest/types@^26.3.0":
+  version "26.3.0"
+  resolved "https://registry.yarnpkg.com/@jest/types/-/types-26.3.0.tgz#97627bf4bdb72c55346eef98e3b3f7ddc4941f71"
+  integrity sha512-BDPG23U0qDeAvU4f99haztXwdAg3hz4El95LkAM+tHAqqhiVzRpEGHHU8EDxT/AnxOrA65YjLBwDahdJ9pTLJQ==
   dependencies:
     "@types/istanbul-lib-coverage" "^2.0.0"
-    "@types/istanbul-reports" "^1.1.1"
+    "@types/istanbul-reports" "^3.0.0"
+    "@types/node" "*"
     "@types/yargs" "^15.0.0"
     chalk "^4.0.0"
 
-"@jest/types@^26.3.0":
-  version "26.3.0"
-  resolved "https://registry.yarnpkg.com/@jest/types/-/types-26.3.0.tgz#97627bf4bdb72c55346eef98e3b3f7ddc4941f71"
-  integrity sha512-BDPG23U0qDeAvU4f99haztXwdAg3hz4El95LkAM+tHAqqhiVzRpEGHHU8EDxT/AnxOrA65YjLBwDahdJ9pTLJQ==
+"@jest/types@^26.6.1":
+  version "26.6.1"
+  resolved "https://registry.yarnpkg.com/@jest/types/-/types-26.6.1.tgz#2638890e8031c0bc8b4681e0357ed986e2f866c5"
+  integrity sha512-ywHavIKNpAVrStiRY5wiyehvcktpijpItvGiK72RAn5ctqmzvPk8OvKnvHeBqa1XdQr959CTWAJMqxI8BTibyg==
   dependencies:
     "@types/istanbul-lib-coverage" "^2.0.0"
     "@types/istanbul-reports" "^3.0.0"
@@ -4851,12 +4857,13 @@ jest-snapshot@^26.4.2:
     pretty-format "^26.4.2"
     semver "^7.3.2"
 
-jest-util@26.x:
-  version "26.1.0"
-  resolved "https://registry.yarnpkg.com/jest-util/-/jest-util-26.1.0.tgz#80e85d4ba820decacf41a691c2042d5276e5d8d8"
-  integrity sha512-rNMOwFQevljfNGvbzNQAxdmXQ+NawW/J72dmddsK0E8vgxXCMtwQ/EH0BiWEIxh0hhMcTsxwAxINt7Lh46Uzbg==
+jest-util@^26.1.0:
+  version "26.6.1"
+  resolved "https://registry.yarnpkg.com/jest-util/-/jest-util-26.6.1.tgz#4cc0d09ec57f28d12d053887eec5dc976a352e9b"
+  integrity sha512-xCLZUqVoqhquyPLuDXmH7ogceGctbW8SMyQVjD9o+1+NPWI7t0vO08udcFLVPLgKWcvc+zotaUv/RuaR6l8HIA==
   dependencies:
-    "@jest/types" "^26.1.0"
+    "@jest/types" "^26.6.1"
+    "@types/node" "*"
     chalk "^4.0.0"
     graceful-fs "^4.2.4"
     is-ci "^2.0.0"
@@ -7119,22 +7126,23 @@ ts-invariant@^0.4.0:
   dependencies:
     tslib "^1.9.3"
 
-ts-jest@26.2.0:
-  version "26.2.0"
-  resolved "https://registry.yarnpkg.com/ts-jest/-/ts-jest-26.2.0.tgz#7ec22faceb05ee1467fdb5265d1b33c27441f163"
-  integrity sha512-9+y2qwzXdAImgLSYLXAb/Rhq9+K4rbt0417b8ai987V60g2uoNWBBmMkYgutI7D8Zhu+IbCSHbBtrHxB9d7xyA==
+ts-jest@26.4.2:
+  version "26.4.2"
+  resolved "https://registry.yarnpkg.com/ts-jest/-/ts-jest-26.4.2.tgz#00b6c970bee202ceef7c6e6e9805c4837b22dab8"
+  integrity sha512-0+MynTTzzbuy5rGjzsCKjxHJk5gY906c/FSaqQ3081+G7dp2Yygfa9hVlbrtNNcztffh1mC6Rs9jb/yHpcjsoQ==
   dependencies:
+    "@jest/create-cache-key-function" "^26.5.0"
     "@types/jest" "26.x"
     bs-logger "0.x"
     buffer-from "1.x"
     fast-json-stable-stringify "2.x"
-    jest-util "26.x"
+    jest-util "^26.1.0"
     json5 "2.x"
     lodash.memoize "4.x"
     make-error "1.x"
     mkdirp "1.x"
     semver "7.x"
-    yargs-parser "18.x"
+    yargs-parser "20.x"
 
 ts-node@9.0.0:
   version "9.0.0"
@@ -7587,12 +7595,10 @@ yaml@^1.7.2:
   dependencies:
     "@babel/runtime" "^7.9.2"
 
-yargs-parser@18.x, yargs-parser@^18.1.1:
-  version "18.1.3"
-  resolved "https://registry.yarnpkg.com/yargs-parser/-/yargs-parser-18.1.3.tgz#be68c4975c6b2abf469236b0c870362fab09a7b0"
-  dependencies:
-    camelcase "^5.0.0"
-    decamelize "^1.2.0"
+yargs-parser@20.x:
+  version "20.2.3"
+  resolved "https://registry.yarnpkg.com/yargs-parser/-/yargs-parser-20.2.3.tgz#92419ba867b858c868acf8bae9bf74af0dd0ce26"
+  integrity sha512-emOFRT9WVHw03QSvN5qor9QQT9+sw5vwxfYweivSMHTcAXPefwVae2FjO7JJjj8hCE4CzPOPeFM83VwT29HCww==
 
 yargs-parser@^15.0.1:
   version "15.0.1"
@@ -7602,6 +7608,13 @@ yargs-parser@^15.0.1:
     camelcase "^5.0.0"
     decamelize "^1.2.0"
 
+yargs-parser@^18.1.1:
+  version "18.1.3"
+  resolved "https://registry.yarnpkg.com/yargs-parser/-/yargs-parser-18.1.3.tgz#be68c4975c6b2abf469236b0c870362fab09a7b0"
+  dependencies:
+    camelcase "^5.0.0"
+    decamelize "^1.2.0"
+
 yargs@^14.2.0:
   version "14.2.3"
   resolved "https://registry.yarnpkg.com/yargs/-/yargs-14.2.3.tgz#1a1c3edced1afb2a2fea33604bc6d1d8d688a414"