diff --git a/package.json b/package.json
index 09dd1c0..fb1aa9b 100644
--- a/package.json
+++ b/package.json
@@ -63,7 +63,7 @@
     "rimraf": "3.0.2",
     "scripty": "2.0.0",
     "supertest": "5.0.0",
-    "ts-jest": "26.4.4",
+    "ts-jest": "26.5.4",
     "ts-loader": "8.0.17",
     "ts-node": "9.0.0",
     "tsconfig-paths": "3.9.0",
diff --git a/yarn.lock b/yarn.lock
index f6b03bc..ff1dd5a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1517,7 +1517,7 @@
   dependencies:
     "@types/istanbul-lib-report" "*"
 
-"@types/jest@26.0.22", "@types/jest@26.x":
+"@types/jest@26.0.22":
   version "26.0.22"
   resolved "https://registry.yarnpkg.com/@types/jest/-/jest-26.0.22.tgz#8308a1debdf1b807aa47be2838acdcd91e88fbe6"
   integrity sha512-eeWwWjlqxvBxc4oQdkueW5OF/gtfSceKk4OnOAGlUSwS/liBRtZppbJuz1YkgbrbfGOoeBHun9fOvXnjNwrSOw==
@@ -6150,11 +6150,6 @@ lodash.has@4.5.2:
   resolved "https://registry.yarnpkg.com/lodash.has/-/lodash.has-4.5.2.tgz#d19f4dc1095058cccbe2b0cdf4ee0fe4aa37c862"
   integrity sha1-0Z9NwQlQWMzL4rDN9O4P5Ko3yGI=
 
-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.set@4.3.2:
   version "4.3.2"
   resolved "https://registry.yarnpkg.com/lodash.set/-/lodash.set-4.3.2.tgz#d8757b1da807dde24816b0d6a84bea1a76230b23"
@@ -6200,7 +6195,7 @@ lodash@4.17.20:
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.20.tgz#b44a9b6297bcb698f1c51a3545a2b3b368d59c52"
   integrity sha512-PlhdFcillOINfeV7Ni6oF1TAEayyZBoZ8bcshTHqOYJYlrqzRK5hagpagky5o4HfCzzd1TRkXPMFq6cKk9rGmA==
 
-lodash@^4.17.11, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.19, lodash@^4.17.20, lodash@^4.17.21:
+lodash@4.x, lodash@^4.17.11, lodash@^4.17.14, 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==
@@ -8619,18 +8614,17 @@ ts-invariant@^0.4.0:
   dependencies:
     tslib "^1.9.3"
 
-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@26.5.4:
+  version "26.5.4"
+  resolved "https://registry.yarnpkg.com/ts-jest/-/ts-jest-26.5.4.tgz#207f4c114812a9c6d5746dd4d1cdf899eafc9686"
+  integrity sha512-I5Qsddo+VTm94SukBJ4cPimOoFZsYTeElR2xy6H2TOVs+NsvgYglW8KuQgKoApOKuaU/Ix/vrF9ebFZlb5D2Pg==
   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"