diff --git a/blockchain/package.json b/blockchain/package.json
index 84f12437..36040034 100644
--- a/blockchain/package.json
+++ b/blockchain/package.json
@@ -33,7 +33,7 @@
     "@openzeppelin/test-helpers": "0.5.9",
     "@openzeppelin/upgrades": "2.8.0",
     "@truffle/contract": "4.3.2",
-    "async": "3.2.0",
+    "async": "3.2.2",
     "keccak": "^3.0.1",
     "truffle": "5.1.57",
     "truffle-assertions": "0.9.2",
diff --git a/blockchain/yarn.lock b/blockchain/yarn.lock
index 6d3c85d9..d3cb7d65 100644
--- a/blockchain/yarn.lock
+++ b/blockchain/yarn.lock
@@ -768,10 +768,10 @@ async@1.x:
   resolved "https://registry.yarnpkg.com/async/-/async-1.5.2.tgz#ec6a61ae56480c0c3cb241c95618e20892f9672a"
   integrity sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo=
 
-async@3.2.0:
-  version "3.2.0"
-  resolved "https://registry.yarnpkg.com/async/-/async-3.2.0.tgz#b3a2685c5ebb641d3de02d161002c60fc9f85720"
-  integrity sha512-TR2mEZFVOj2pLStYxLht7TyfuRzaydfpxr3k9RpHIzMgw7A64dzsdqCxH1WJyQdoe8T10nDXd9wnEigmiuHIZw==
+async@3.2.2:
+  version "3.2.2"
+  resolved "https://registry.yarnpkg.com/async/-/async-3.2.2.tgz#2eb7671034bb2194d45d30e31e24ec7e7f9670cd"
+  integrity sha512-H0E+qZaDEfx/FY4t7iLRv1W2fFI6+pyCeTw1uN20AQPiwqwM6ojPxHxdLv4z8hi2DtnW9BOckSspLucW7pIE5g==
 
 asynckit@^0.4.0:
   version "0.4.0"