diff --git a/packages/signature-v4a/package.json b/packages/signature-v4a/package.json
index 059a244657f..e4bdf8309ac 100644
--- a/packages/signature-v4a/package.json
+++ b/packages/signature-v4a/package.json
@@ -37,7 +37,7 @@
     "@smithy/protocol-http": "workspace:^",
     "concurrently": "7.0.0",
     "downlevel-dts": "0.10.1",
-    "elliptic": "6.5.5",
+    "elliptic": "6.6.1",
     "rimraf": "3.0.2"
   },
   "engines": {
diff --git a/yarn.lock b/yarn.lock
index f70a296d615..af4fb47d1e9 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2850,7 +2850,7 @@ __metadata:
     "@smithy/util-utf8": "workspace:^"
     concurrently: "npm:7.0.0"
     downlevel-dts: "npm:0.10.1"
-    elliptic: "npm:6.5.5"
+    elliptic: "npm:6.6.1"
     rimraf: "npm:3.0.2"
     tslib: "npm:^2.6.2"
   languageName: unknown
@@ -5348,9 +5348,9 @@ __metadata:
   languageName: node
   linkType: hard
 
-"elliptic@npm:6.5.5":
-  version: 6.5.5
-  resolution: "elliptic@npm:6.5.5"
+"elliptic@npm:6.6.1":
+  version: 6.6.1
+  resolution: "elliptic@npm:6.6.1"
   dependencies:
     bn.js: "npm:^4.11.9"
     brorand: "npm:^1.1.0"
@@ -5359,7 +5359,7 @@ __metadata:
     inherits: "npm:^2.0.4"
     minimalistic-assert: "npm:^1.0.1"
     minimalistic-crypto-utils: "npm:^1.0.1"
-  checksum: 10c0/3e591e93783a1b66f234ebf5bd3a8a9a8e063a75073a35a671e03e3b25253b6e33ac121f7efe9b8808890fffb17b40596cc19d01e6e8d1fa13b9a56ff65597c8
+  checksum: 10c0/8b24ef782eec8b472053793ea1e91ae6bee41afffdfcb78a81c0a53b191e715cbe1292aa07165958a9bbe675bd0955142560b1a007ffce7d6c765bcaf951a867
   languageName: node
   linkType: hard