diff --git a/protocol/package.json b/protocol/package.json
index 616f09b..1ae8191 100644
--- a/protocol/package.json
+++ b/protocol/package.json
@@ -6,7 +6,7 @@
   "license": "AGPL-3.0",
   "devDependencies": {
     "@nomiclabs/hardhat-ethers": "^2.0.0",
-    "@nomiclabs/hardhat-etherscan": "^2.0.1",
+    "@nomiclabs/hardhat-etherscan": "^2.1.3",
     "@nomiclabs/hardhat-waffle": "^2.0.0",
     "@openzeppelin/contracts": "^3.2.0",
     "@typechain/ethers-v5": "^4.0.0",
diff --git a/protocol/yarn.lock b/protocol/yarn.lock
index 31df057..8dfd992 100644
--- a/protocol/yarn.lock
+++ b/protocol/yarn.lock
@@ -442,14 +442,15 @@
   resolved "https://registry.yarnpkg.com/@nomiclabs/hardhat-ethers/-/hardhat-ethers-2.0.0.tgz#ebab032b3aed03945ea560f56bb67aec56a30cbc"
   integrity sha512-fIi6XP9PgKqwSNVcLDr6S5hvGlc21PendaLD5eGdXEXc9aYQ0OJX8Mk3evs+p78x7W9n9U3ZcKtTiGc1+YScDw==
 
-"@nomiclabs/hardhat-etherscan@^2.0.1":
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/@nomiclabs/hardhat-etherscan/-/hardhat-etherscan-2.0.1.tgz#576c162b0c2b8f5913b3853f4591e98ccc1c2e4d"
-  integrity sha512-5xPh5xhLXO1tDO0VTc4qlqqgv2m1bL+pXLSFibUVJ2EzzXHKn1C4ioHmYgseIkoNC3iG19cSJ7gRcQz4u54pGQ==
+"@nomiclabs/hardhat-etherscan@^2.1.3":
+  version "2.1.3"
+  resolved "https://registry.yarnpkg.com/@nomiclabs/hardhat-etherscan/-/hardhat-etherscan-2.1.3.tgz#ba52e5cb526f6c477e5e97e07c72a42232773c92"
+  integrity sha512-0Ic5dLBWASeX3e8tR5cdfoSQw8fTp2Bw49RGUN1pSJuxKIQAOWq5MI9qC1Bd51xK/AsdRSnHDxoVYK1+FC1s1w==
   dependencies:
     "@ethersproject/abi" "^5.0.2"
     "@ethersproject/address" "^5.0.2"
     cbor "^5.0.2"
+    debug "^4.1.1"
     fs-extra "^7.0.1"
     node-fetch "^2.6.0"
     semver "^6.3.0"
@@ -966,6 +967,13 @@ aws4@^1.8.0:
   resolved "https://registry.yarnpkg.com/aws4/-/aws4-1.10.1.tgz#e1e82e4f3e999e2cfd61b161280d16a111f86428"
   integrity sha512-zg7Hz2k5lI8kb7U32998pRRFin7zJlkfezGJjUc2heaD4Pw2wObakCDVzkKztTm/Ln7eiVvYsjqak0Ed4LkMDA==
 
+axios@^0.21.0:
+  version "0.21.1"
+  resolved "https://registry.yarnpkg.com/axios/-/axios-0.21.1.tgz#22563481962f4d6bde9a76d516ef0e5d3c09b2b8"
+  integrity sha512-dKQiRHxGD9PPRIUNIWvZhPTPpl1rf/OxTYKsqKUDjBwYylTvV7SjSHJb9ratfyzM6wCdLCOYLzs73qpg5c4iGA==
+  dependencies:
+    follow-redirects "^1.10.0"
+
 babel-code-frame@^6.26.0:
   version "6.26.0"
   resolved "https://registry.yarnpkg.com/babel-code-frame/-/babel-code-frame-6.26.0.tgz#63fd43f7dc1e3bb7ce35947db8fe369a3f58c74b"
@@ -3254,6 +3262,11 @@ flow-stoplight@^1.0.0:
   resolved "https://registry.yarnpkg.com/flow-stoplight/-/flow-stoplight-1.0.0.tgz#4a292c5bcff8b39fa6cc0cb1a853d86f27eeff7b"
   integrity sha1-SiksW8/4s5+mzAyxqFPYbyfu/3s=
 
+follow-redirects@^1.10.0:
+  version "1.14.1"
+  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.14.1.tgz#d9114ded0a1cfdd334e164e6662ad02bfd91ff43"
+  integrity sha512-HWqDgT7ZEkqRzBvc2s64vSZ/hfOceEol3ac/7tKwzuvEyWx3/4UegXh5oBOIotkGsObyk3xznnSRVADBgWSQVg==
+
 follow-redirects@^1.12.1:
   version "1.13.0"
   resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.13.0.tgz#b42e8d93a2a7eea5ed88633676d6597bc8e384db"