diff --git a/package.json b/package.json
index 3e69f9b..8126d03 100644
--- a/package.json
+++ b/package.json
@@ -13,14 +13,14 @@
     "io-ts-reporters": "^1.2.2"
   },
   "devDependencies": {
-    "@types/express": "^4.17.7",
+    "@types/express": "^4.17.12",
     "express": "^4.17.1",
     "io-ts": "^2.2.10",
     "io-ts-types": "^0.5.10",
     "typescript": "^4.0.2"
   },
   "peerDependencies": {
-    "@types/express": "^4.17.7",
+    "@types/express": "^4.17.12",
     "express": "^4.17.1",
     "io-ts": "^2.2.10",
     "io-ts-types": "^0.5.10"
diff --git a/yarn.lock b/yarn.lock
index 45c9d25..c2dd2ea 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -17,22 +17,22 @@
   dependencies:
     "@types/node" "*"
 
-"@types/express-serve-static-core@*":
-  version "4.17.9"
-  resolved "https://registry.yarnpkg.com/@types/express-serve-static-core/-/express-serve-static-core-4.17.9.tgz#2d7b34dcfd25ec663c25c85d76608f8b249667f1"
-  integrity sha512-DG0BYg6yO+ePW+XoDENYz8zhNGC3jDDEpComMYn7WJc4mY1Us8Rw9ax2YhJXxpyk2SF47PQAoQ0YyVT1a0bEkA==
+"@types/express-serve-static-core@*", "@types/express-serve-static-core@^4.17.18":
+  version "4.17.20"
+  resolved "https://registry.yarnpkg.com/@types/express-serve-static-core/-/express-serve-static-core-4.17.20.tgz#44caee029f2c26c46711da5e845cdc12167ad72d"
+  integrity sha512-8qqFN4W53IEWa9bdmuVrUcVkFemQWnt5DKPQ/oa8xKDYgtjCr2OO6NX5TIK49NLFr3mPYU2cLh92DQquC3oWWQ==
   dependencies:
     "@types/node" "*"
     "@types/qs" "*"
     "@types/range-parser" "*"
 
-"@types/express@^4.17.7":
-  version "4.17.7"
-  resolved "https://registry.yarnpkg.com/@types/express/-/express-4.17.7.tgz#42045be6475636d9801369cd4418ef65cdb0dd59"
-  integrity sha512-dCOT5lcmV/uC2J9k0rPafATeeyz+99xTt54ReX11/LObZgfzJqZNcW27zGhYyX+9iSEGXGt5qLPwRSvBZcLvtQ==
+"@types/express@^4.17.12":
+  version "4.17.12"
+  resolved "https://registry.yarnpkg.com/@types/express/-/express-4.17.12.tgz#4bc1bf3cd0cfe6d3f6f2853648b40db7d54de350"
+  integrity sha512-pTYas6FrP15B1Oa0bkN5tQMNqOcVXa9j4FTFtO8DWI9kppKib+6NJtfTOOLcwxuuYvcX2+dVG6et1SxW/Kc17Q==
   dependencies:
     "@types/body-parser" "*"
-    "@types/express-serve-static-core" "*"
+    "@types/express-serve-static-core" "^4.17.18"
     "@types/qs" "*"
     "@types/serve-static" "*"