diff --git a/cdk/package.json b/cdk/package.json
index 5462413..8d382a9 100644
--- a/cdk/package.json
+++ b/cdk/package.json
@@ -27,7 +27,7 @@
     "eslint-plugin-prettier": "^3.1.4",
     "jest": "^26.6.3",
     "prettier": "^2.2.1",
-    "ts-jest": "^26.4.4",
+    "ts-jest": "^26.5.5",
     "ts-node": "^9.1.1",
     "typescript": "~4.1.3"
   },
diff --git a/cdk/yarn.lock b/cdk/yarn.lock
index ea9607c..e502028 100644
--- a/cdk/yarn.lock
+++ b/cdk/yarn.lock
@@ -1289,17 +1289,6 @@
     source-map "^0.6.1"
     write-file-atomic "^3.0.0"
 
-"@jest/types@^26.5.2":
-  version "26.5.2"
-  resolved "https://registry.yarnpkg.com/@jest/types/-/types-26.5.2.tgz#44c24f30c8ee6c7f492ead9ec3f3c62a5289756d"
-  integrity sha512-QDs5d0gYiyetI8q+2xWdkixVQMklReZr4ltw7GFDtb4fuJIBCE6mzj2LnitGqCuAlLap6wPyb8fpoHgwZz5fdg==
-  dependencies:
-    "@types/istanbul-lib-coverage" "^2.0.0"
-    "@types/istanbul-reports" "^3.0.0"
-    "@types/node" "*"
-    "@types/yargs" "^15.0.0"
-    chalk "^4.0.0"
-
 "@jest/types@^26.6.2":
   version "26.6.2"
   resolved "https://registry.yarnpkg.com/@jest/types/-/types-26.6.2.tgz#bef5a532030e1d88a2f5a6d933f84e97226ed48e"
@@ -1410,7 +1399,7 @@
   dependencies:
     "@types/istanbul-lib-report" "*"
 
-"@types/jest@26.x", "@types/jest@^26.0.20":
+"@types/jest@^26.0.20":
   version "26.0.20"
   resolved "https://registry.yarnpkg.com/@types/jest/-/jest-26.0.20.tgz#cd2f2702ecf69e86b586e1f5223a60e454056307"
   integrity sha512-9zi2Y+5USJRxd0FsahERhBwlcvFh6D2GLQnY2FH2BzK8J9s9omvNHIbvABwIluXa0fD8XVKMLTO0aOEuUfACAA==
@@ -3982,19 +3971,7 @@ jest-snapshot@^26.6.2:
     pretty-format "^26.6.2"
     semver "^7.3.2"
 
-jest-util@^26.1.0:
-  version "26.5.2"
-  resolved "https://registry.yarnpkg.com/jest-util/-/jest-util-26.5.2.tgz#8403f75677902cc52a1b2140f568e91f8ed4f4d7"
-  integrity sha512-WTL675bK+GSSAYgS8z9FWdCT2nccO1yTIplNLPlP0OD8tUk/H5IrWKMMRudIQQ0qp8bb4k+1Qa8CxGKq9qnYdg==
-  dependencies:
-    "@jest/types" "^26.5.2"
-    "@types/node" "*"
-    chalk "^4.0.0"
-    graceful-fs "^4.2.4"
-    is-ci "^2.0.0"
-    micromatch "^4.0.2"
-
-jest-util@^26.6.2:
+jest-util@^26.1.0, jest-util@^26.6.2:
   version "26.6.2"
   resolved "https://registry.yarnpkg.com/jest-util/-/jest-util-26.6.2.tgz#907535dbe4d5a6cb4c47ac9b926f6af29576cbc1"
   integrity sha512-MDW0fKfsn0OI7MS7Euz6h8HNDXVQ0gaM9uW6RjfDmd1DAFcaxX9OqIakHIqhbnmF08Cf2DLDG+ulq8YQQ0Lp0Q==
@@ -4305,11 +4282,6 @@ lodash.isplainobject@^4.0.6:
   resolved "https://registry.yarnpkg.com/lodash.isplainobject/-/lodash.isplainobject-4.0.6.tgz#7c526a52d89b45c45cc690b88163be0497f550cb"
   integrity sha1-fFJqUtibRcRcxpC4gWO+BJf1UMs=
 
-lodash.memoize@4.x:
-  version "4.1.2"
-  resolved "https://registry.yarnpkg.com/lodash.memoize/-/lodash.memoize-4.1.2.tgz#bcc6c49a42a2840ed997f323eada5ecd182e0bfe"
-  integrity sha1-vMbEmkKihA7Zl/Mj6tpezRguC/4=
-
 lodash.sortby@^4.7.0:
   version "4.7.0"
   resolved "https://registry.yarnpkg.com/lodash.sortby/-/lodash.sortby-4.7.0.tgz#edd14c824e2cc9c1e0b0a1b42bb5210516a42438"
@@ -4325,7 +4297,7 @@ lodash.union@^4.6.0:
   resolved "https://registry.yarnpkg.com/lodash.union/-/lodash.union-4.6.0.tgz#48bb5088409f16f1821666641c44dd1aaae3cd88"
   integrity sha1-SLtQiECfFvGCFmZkHETdGqrjzYg=
 
-lodash@^4.17.15, lodash@^4.17.19, lodash@^4.17.20, lodash@^4.17.21:
+lodash@4.x, lodash@^4.17.15, lodash@^4.17.19, lodash@^4.17.20, lodash@^4.17.21:
   version "4.17.21"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
   integrity sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==
@@ -5277,23 +5249,18 @@ saxes@^5.0.0:
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.7.1.tgz#a954f931aeba508d307bbf069eff0c01c96116f7"
   integrity sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==
 
-semver@7.x, semver@^7.2.1, semver@^7.3.2:
-  version "7.3.2"
-  resolved "https://registry.yarnpkg.com/semver/-/semver-7.3.2.tgz#604962b052b81ed0786aae84389ffba70ffd3938"
-  integrity sha512-OrOb32TeeambH6UrhtShmF7CRDqhL6/5XpPNp2DuRH6+9QLw/orhp72j87v8Qa1ScDkvrrBNpZcDejAirJmfXQ==
-
-semver@^6.0.0, semver@^6.3.0:
-  version "6.3.0"
-  resolved "https://registry.yarnpkg.com/semver/-/semver-6.3.0.tgz#ee0a64c8af5e8ceea67687b133761e1becbd1d3d"
-  integrity sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==
-
-semver@^7.3.5:
+semver@7.x, semver@^7.2.1, semver@^7.3.2, semver@^7.3.5:
   version "7.3.5"
   resolved "https://registry.yarnpkg.com/semver/-/semver-7.3.5.tgz#0b621c879348d8998e4b0e4be94b3f12e6018ef7"
   integrity sha512-PoeGJYh8HK4BTO/a9Tf6ZG3veo/A7ZVsYrSA6J8ny9nb3B1VrpkuN+z9OE5wfE5p6H4LchYZsegiQgbJD94ZFQ==
   dependencies:
     lru-cache "^6.0.0"
 
+semver@^6.0.0, semver@^6.3.0:
+  version "6.3.0"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-6.3.0.tgz#ee0a64c8af5e8ceea67687b133761e1becbd1d3d"
+  integrity sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==
+
 set-blocking@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/set-blocking/-/set-blocking-2.0.0.tgz#045f9782d011ae9a6803ddd382b24392b3d890f7"
@@ -5790,18 +5757,17 @@ tr46@^2.0.2:
   dependencies:
     punycode "^2.1.1"
 
-ts-jest@^26.4.4:
-  version "26.4.4"
-  resolved "https://registry.yarnpkg.com/ts-jest/-/ts-jest-26.4.4.tgz#61f13fb21ab400853c532270e52cc0ed7e502c49"
-  integrity sha512-3lFWKbLxJm34QxyVNNCgXX1u4o/RV0myvA2y2Bxm46iGIjKlaY0own9gIckbjZJPn+WaJEnfPPJ20HHGpoq4yg==
+ts-jest@^26.5.5:
+  version "26.5.5"
+  resolved "https://registry.yarnpkg.com/ts-jest/-/ts-jest-26.5.5.tgz#e40481b6ee4dd162626ba481a2be05fa57160ea5"
+  integrity sha512-7tP4m+silwt1NHqzNRAPjW1BswnAhopTdc2K3HEkRZjF0ZG2F/e/ypVH0xiZIMfItFtD3CX0XFbwPzp9fIEUVg==
   dependencies:
-    "@types/jest" "26.x"
     bs-logger "0.x"
     buffer-from "1.x"
     fast-json-stable-stringify "2.x"
     jest-util "^26.1.0"
     json5 "2.x"
-    lodash.memoize "4.x"
+    lodash "4.x"
     make-error "1.x"
     mkdirp "1.x"
     semver "7.x"