diff --git a/package.json b/package.json
index 87cf525..e9d5449 100644
--- a/package.json
+++ b/package.json
@@ -58,7 +58,7 @@
     "nock": "^13.1.0",
     "prettier": "^2.3.1",
     "pretty-quick": "^3.1.1",
-    "ts-jest": "27.0.3",
+    "ts-jest": "^26.5.6",
     "typescript": "^4.3.4"
   },
   "husky": {
diff --git a/yarn.lock b/yarn.lock
index e05e479..e3817be 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1535,17 +1535,6 @@
     "@types/yargs" "^15.0.0"
     chalk "^4.0.0"
 
-"@jest/types@^27.0.2":
-  version "27.0.2"
-  resolved "https://registry.npmjs.org/@jest/types/-/types-27.0.2.tgz#e153d6c46bda0f2589f0702b071f9898c7bbd37e"
-  integrity sha512-XpjCtJ/99HB4PmyJ2vgmN7vT+JLP7RW1FBT9RgnMFS4Dt7cvIyBee8O3/j98aUZ34ZpenPZFqmaaObWSeL65dg==
-  dependencies:
-    "@types/istanbul-lib-coverage" "^2.0.0"
-    "@types/istanbul-reports" "^3.0.0"
-    "@types/node" "*"
-    "@types/yargs" "^16.0.0"
-    chalk "^4.0.0"
-
 "@nodelib/fs.scandir@2.1.5":
   version "2.1.5"
   resolved "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.5.tgz#7619c2eb21b25483f6d167548b4cfd5a7488c3d5"
@@ -2183,13 +2172,6 @@
   dependencies:
     "@types/yargs-parser" "*"
 
-"@types/yargs@^16.0.0":
-  version "16.0.3"
-  resolved "https://registry.npmjs.org/@types/yargs/-/yargs-16.0.3.tgz#4b6d35bb8e680510a7dc2308518a80ee1ef27e01"
-  integrity sha512-YlFfTGS+zqCgXuXNV26rOIeETOkXnGQXP/pjjL9P0gO/EP9jTmc7pUBhx+jVEIxpq41RX33GQ7N3DzOSfZoglQ==
-  dependencies:
-    "@types/yargs-parser" "*"
-
 "@typescript-eslint/eslint-plugin@^4.5.0":
   version "4.27.0"
   resolved "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-4.27.0.tgz#0b7fc974e8bc9b2b5eb98ed51427b0be529b4ad0"
@@ -3684,11 +3666,6 @@ ci-info@^2.0.0:
   resolved "https://registry.npmjs.org/ci-info/-/ci-info-2.0.0.tgz#67a9e964be31a51e15e5010d58e6f12834002f46"
   integrity sha512-5tK7EtrZ0N+OLFMthtqOj4fI2Jeb88C4CAZPu25LDVUgXJ0A3Js4PMGqrn0JU1W0Mh1/Z8wZzYPxqUrXeBboCQ==
 
-ci-info@^3.1.1:
-  version "3.2.0"
-  resolved "https://registry.npmjs.org/ci-info/-/ci-info-3.2.0.tgz#2876cb948a498797b5236f0095bc057d0dca38b6"
-  integrity sha512-dVqRX7fLUm8J6FgHJ418XuIgDLZDkYcDFTeL6TA2gt5WlIZUQrrH6EZrNClwT/H0FateUsZkGIOPRrLbP+PR9A==
-
 cipher-base@^1.0.0, cipher-base@^1.0.1, cipher-base@^1.0.3:
   version "1.0.4"
   resolved "https://registry.npmjs.org/cipher-base/-/cipher-base-1.0.4.tgz#8760e4ecc272f4c363532f926d874aae2c1397de"
@@ -6733,13 +6710,6 @@ is-ci@^2.0.0:
   dependencies:
     ci-info "^2.0.0"
 
-is-ci@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.npmjs.org/is-ci/-/is-ci-3.0.0.tgz#c7e7be3c9d8eef7d0fa144390bd1e4b88dc4c994"
-  integrity sha512-kDXyttuLeslKAHYL/K28F2YkM3x5jvFPEw3yXbRptXydjD9rpLEz+C5K5iutY9ZiUu6AP41JdvRQwF4Iqs4ZCQ==
-  dependencies:
-    ci-info "^3.1.1"
-
 is-color-stop@^1.0.0:
   version "1.1.0"
   resolved "https://registry.npmjs.org/is-color-stop/-/is-color-stop-1.1.0.tgz#cfff471aee4dd5c9e158598fbe12967b5cdad345"
@@ -7472,7 +7442,7 @@ jest-snapshot@^26.6.0, jest-snapshot@^26.6.2:
     pretty-format "^26.6.2"
     semver "^7.3.2"
 
-jest-util@^26.6.0, jest-util@^26.6.2:
+jest-util@^26.1.0, jest-util@^26.6.0, jest-util@^26.6.2:
   version "26.6.2"
   resolved "https://registry.npmjs.org/jest-util/-/jest-util-26.6.2.tgz#907535dbe4d5a6cb4c47ac9b926f6af29576cbc1"
   integrity sha512-MDW0fKfsn0OI7MS7Euz6h8HNDXVQ0gaM9uW6RjfDmd1DAFcaxX9OqIakHIqhbnmF08Cf2DLDG+ulq8YQQ0Lp0Q==
@@ -7484,18 +7454,6 @@ jest-util@^26.6.0, jest-util@^26.6.2:
     is-ci "^2.0.0"
     micromatch "^4.0.2"
 
-jest-util@^27.0.0:
-  version "27.0.2"
-  resolved "https://registry.npmjs.org/jest-util/-/jest-util-27.0.2.tgz#fc2c7ace3c75ae561cf1e5fdb643bf685a5be7c7"
-  integrity sha512-1d9uH3a00OFGGWSibpNYr+jojZ6AckOMCXV2Z4K3YXDnzpkAaXQyIpY14FOJPiUmil7CD+A6Qs+lnnh6ctRbIA==
-  dependencies:
-    "@jest/types" "^27.0.2"
-    "@types/node" "*"
-    chalk "^4.0.0"
-    graceful-fs "^4.2.4"
-    is-ci "^3.0.0"
-    picomatch "^2.2.3"
-
 jest-validate@^26.6.2:
   version "26.6.2"
   resolved "https://registry.npmjs.org/jest-validate/-/jest-validate-26.6.2.tgz#23d380971587150467342911c3d7b4ac57ab20ec"
@@ -12175,15 +12133,15 @@ tryer@^1.0.1:
   resolved "https://registry.npmjs.org/tryer/-/tryer-1.0.1.tgz#f2c85406800b9b0f74c9f7465b81eaad241252f8"
   integrity sha512-c3zayb8/kWWpycWYg87P71E1S1ZL6b6IJxfb5fvsUgsf0S2MVGaDhDXXjDMpdCpfWXqptc+4mXwmiy1ypXqRAA==
 
-ts-jest@27.0.3:
-  version "27.0.3"
-  resolved "https://registry.npmjs.org/ts-jest/-/ts-jest-27.0.3.tgz#808492f022296cde19390bb6ad627c8126bf93f8"
-  integrity sha512-U5rdMjnYam9Ucw+h0QvtNDbc5+88nxt7tbIvqaZUhFrfG4+SkWhMXjejCLVGcpILTPuV+H3W/GZDZrnZFpPeXw==
+ts-jest@^26.5.6:
+  version "26.5.6"
+  resolved "https://registry.npmjs.org/ts-jest/-/ts-jest-26.5.6.tgz#c32e0746425274e1dfe333f43cd3c800e014ec35"
+  integrity sha512-rua+rCP8DxpA8b4DQD/6X2HQS8Zy/xzViVYfEs2OQu68tkCuKLV0Md8pmX55+W24uRIyAsf/BajRfxOs+R2MKA==
   dependencies:
     bs-logger "0.x"
     buffer-from "1.x"
     fast-json-stable-stringify "2.x"
-    jest-util "^27.0.0"
+    jest-util "^26.1.0"
     json5 "2.x"
     lodash "4.x"
     make-error "1.x"