diff --git a/package.json b/package.json
index 5c1eff24..95c94147 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "echidna": "yarn echidna:build && docker run -v \"$PWD\":/src pool-contracts/echidna"
   },
   "dependencies": {
-    "@openzeppelin/contracts-upgradeable": "3.4.0",
+    "@openzeppelin/contracts-upgradeable": "3.4.2",
     "@pooltogether/fixed-point": "1.0.0-beta.2",
     "@pooltogether/pooltogether-rng-contracts": "1.0.0",
     "@pooltogether/uniform-random-number": "1.0.0-beta.1",
diff --git a/yarn.lock b/yarn.lock
index 586de429..b934dc50 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1299,10 +1299,10 @@
     "@types/sinon-chai" "^3.2.3"
     "@types/web3" "1.0.19"
 
-"@openzeppelin/contracts-upgradeable@3.4.0":
-  version "3.4.0"
-  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts-upgradeable/-/contracts-upgradeable-3.4.0.tgz#7674c73c643a509f1b90c509e3e72fe9aae02aeb"
-  integrity sha512-7wBcbukDqWZt/B1zjb7zyeWq+AC7rx7nGln7/hPxHdKd8PAiiteXd51Cp2KmGP8qaY0/TXh/fQLsA082LWp8Zw==
+"@openzeppelin/contracts-upgradeable@3.4.2":
+  version "3.4.2"
+  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts-upgradeable/-/contracts-upgradeable-3.4.2.tgz#2c2a1b0fa748235a1f495b6489349776365c51b3"
+  integrity sha512-mDlBS17ymb2wpaLcrqRYdnBAmP1EwqhOXMvqWk2c5Q1N1pm5TkiCtXM9Xzznh4bYsQBq0aIWEkFFE2+iLSN1Tw==
 
 "@pooltogether/fixed-point@1.0.0-beta.2":
   version "1.0.0-beta.2"
@@ -3743,11 +3743,6 @@ depd@~1.1.2:
   resolved "https://registry.yarnpkg.com/depd/-/depd-1.1.2.tgz#9bcd52e14c097763e749b274c4346ed2e560b5a9"
   integrity sha1-m81S4UwJd2PnSbJ0xDRu0uVgtak=
 
-deploy-eip-1820@1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/deploy-eip-1820/-/deploy-eip-1820-1.0.0.tgz#59aa3de9cc8d2bcee9d7a1e5d1aff8b0f117d693"
-  integrity sha512-WQG0ANtT8/Wcq77Tva4quphOVWzwlpxvtVPUuLrbkXSuU27LMZ8tEszpelc/1nDudiuj54mVBIXbOgkCMqKOkg==
-
 des.js@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/des.js/-/des.js-1.0.1.tgz#5382142e1bdc53f85d86d53e5f4aa7deb91e0843"