diff --git a/modules/caching-materials-manager-browser/package.json b/modules/caching-materials-manager-browser/package.json
index 4fb052133..6b3adb03e 100644
--- a/modules/caching-materials-manager-browser/package.json
+++ b/modules/caching-materials-manager-browser/package.json
@@ -23,7 +23,7 @@
     "@aws-crypto/serialize": "file:../serialize",
     "@aws-crypto/web-crypto-backend": "file:../web-crypto-backend",
     "@aws-sdk/util-base64-browser": "3.1.0",
-    "@aws-sdk/util-utf8-browser": "3.1.0",
+    "@aws-sdk/util-utf8-browser": "3.12.0",
     "tslib": "^1.11.1"
   },
   "sideEffects": false,
diff --git a/modules/decrypt-browser/package.json b/modules/decrypt-browser/package.json
index a21c19e54..6645431f6 100644
--- a/modules/decrypt-browser/package.json
+++ b/modules/decrypt-browser/package.json
@@ -19,7 +19,7 @@
   "dependencies": {
     "@aws-crypto/material-management-browser": "file:../material-management-browser",
     "@aws-crypto/serialize": "file:../serialize",
-    "@aws-sdk/util-utf8-browser": "3.1.0",
+    "@aws-sdk/util-utf8-browser": "3.12.0",
     "tslib": "^1.11.1"
   },
   "sideEffects": false,
diff --git a/modules/encrypt-browser/package.json b/modules/encrypt-browser/package.json
index 8ddd93251..1b0b203b2 100644
--- a/modules/encrypt-browser/package.json
+++ b/modules/encrypt-browser/package.json
@@ -20,7 +20,7 @@
     "@aws-crypto/material-management-browser": "file:../material-management-browser",
     "@aws-crypto/serialize": "file:../serialize",
     "@aws-crypto/web-crypto-backend": "file:../web-crypto-backend",
-    "@aws-sdk/util-utf8-browser": "3.1.0",
+    "@aws-sdk/util-utf8-browser": "3.12.0",
     "tslib": "^1.11.1"
   },
   "sideEffects": false,
diff --git a/modules/integration-browser/package.json b/modules/integration-browser/package.json
index 51670b588..0d4ca9121 100644
--- a/modules/integration-browser/package.json
+++ b/modules/integration-browser/package.json
@@ -20,7 +20,7 @@
     "@aws-crypto/client-browser": "file:../client-browser",
     "@aws-sdk/karma-credential-loader": "3.1.0",
     "@aws-sdk/util-base64-browser": "3.1.0",
-    "@aws-sdk/util-utf8-browser": "3.1.0",
+    "@aws-sdk/util-utf8-browser": "3.12.0",
     "@trust/keyto": "^1.0.1",
     "@types/got": "^9.6.9",
     "@types/stream-to-promise": "^2.2.0",
diff --git a/modules/raw-aes-keyring-browser/package.json b/modules/raw-aes-keyring-browser/package.json
index c40eb6b06..15bad9e35 100644
--- a/modules/raw-aes-keyring-browser/package.json
+++ b/modules/raw-aes-keyring-browser/package.json
@@ -23,7 +23,7 @@
     "@aws-crypto/raw-keyring": "file:../raw-keyring",
     "@aws-crypto/serialize": "file:../serialize",
     "@aws-crypto/web-crypto-backend": "file:../web-crypto-backend",
-    "@aws-sdk/util-utf8-browser": "3.1.0",
+    "@aws-sdk/util-utf8-browser": "3.12.0",
     "tslib": "^1.11.1"
   },
   "sideEffects": false,
diff --git a/package-lock.json b/package-lock.json
index 65034624e..b90325022 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -123,7 +123,7 @@
         "@aws-crypto/serialize": "file:../serialize",
         "@aws-crypto/web-crypto-backend": "file:../web-crypto-backend",
         "@aws-sdk/util-base64-browser": "3.1.0",
-        "@aws-sdk/util-utf8-browser": "3.1.0",
+        "@aws-sdk/util-utf8-browser": "3.12.0",
         "tslib": "^1.11.1"
       }
     },
@@ -183,7 +183,7 @@
       "dependencies": {
         "@aws-crypto/material-management-browser": "file:../material-management-browser",
         "@aws-crypto/serialize": "file:../serialize",
-        "@aws-sdk/util-utf8-browser": "3.1.0",
+        "@aws-sdk/util-utf8-browser": "3.12.0",
         "tslib": "^1.11.1"
       }
     },
@@ -232,7 +232,7 @@
         "@aws-crypto/material-management-browser": "file:../material-management-browser",
         "@aws-crypto/serialize": "file:../serialize",
         "@aws-crypto/web-crypto-backend": "file:../web-crypto-backend",
-        "@aws-sdk/util-utf8-browser": "3.1.0",
+        "@aws-sdk/util-utf8-browser": "3.12.0",
         "tslib": "^1.11.1"
       }
     },
@@ -673,7 +673,7 @@
         "@aws-crypto/client-browser": "file:../client-browser",
         "@aws-sdk/karma-credential-loader": "3.1.0",
         "@aws-sdk/util-base64-browser": "3.1.0",
-        "@aws-sdk/util-utf8-browser": "3.1.0",
+        "@aws-sdk/util-utf8-browser": "3.12.0",
         "@trust/keyto": "^1.0.1",
         "@types/got": "^9.6.9",
         "@types/stream-to-promise": "^2.2.0",
@@ -909,7 +909,7 @@
         "@aws-crypto/raw-keyring": "file:../raw-keyring",
         "@aws-crypto/serialize": "file:../serialize",
         "@aws-crypto/web-crypto-backend": "file:../web-crypto-backend",
-        "@aws-sdk/util-utf8-browser": "3.1.0",
+        "@aws-sdk/util-utf8-browser": "3.12.0",
         "tslib": "^1.11.1"
       }
     },
@@ -1804,9 +1804,9 @@
       }
     },
     "node_modules/@aws-sdk/util-utf8-browser": {
-      "version": "3.1.0",
-      "resolved": "https://registry.npmjs.org/@aws-sdk/util-utf8-browser/-/util-utf8-browser-3.1.0.tgz",
-      "integrity": "sha512-vJP20me+Wc1RJHq+Y+gFD25aWhbQte+Qkyh3SOKQ+YvNaMcaeVwOV7b3Y3ItBuMdutHLJWmbJ2wF6dhhpy1kOA==",
+      "version": "3.12.0",
+      "resolved": "https://registry.npmjs.org/@aws-sdk/util-utf8-browser/-/util-utf8-browser-3.12.0.tgz",
+      "integrity": "sha512-gfchf9e1qbpYgxgEcUV6+KpVBNJjdqLAPMYHLytCLeMh/Mr5NY+xXefnQz0FhAqhz8lJ/vuDvtTWHodSofArEw==",
       "dependencies": {
         "tslib": "^1.8.0"
       }
@@ -26232,7 +26232,7 @@
         "@aws-crypto/serialize": "file:../serialize",
         "@aws-crypto/web-crypto-backend": "file:../web-crypto-backend",
         "@aws-sdk/util-base64-browser": "3.1.0",
-        "@aws-sdk/util-utf8-browser": "3.1.0",
+        "@aws-sdk/util-utf8-browser": "3.12.0",
         "tslib": "^1.11.1"
       },
       "dependencies": {
@@ -26286,7 +26286,7 @@
       "requires": {
         "@aws-crypto/material-management-browser": "file:../material-management-browser",
         "@aws-crypto/serialize": "file:../serialize",
-        "@aws-sdk/util-utf8-browser": "3.1.0",
+        "@aws-sdk/util-utf8-browser": "3.12.0",
         "tslib": "^1.11.1"
       }
     },
@@ -26330,7 +26330,7 @@
         "@aws-crypto/material-management-browser": "file:../material-management-browser",
         "@aws-crypto/serialize": "file:../serialize",
         "@aws-crypto/web-crypto-backend": "file:../web-crypto-backend",
-        "@aws-sdk/util-utf8-browser": "3.1.0",
+        "@aws-sdk/util-utf8-browser": "3.12.0",
         "tslib": "^1.11.1"
       }
     },
@@ -26646,7 +26646,7 @@
         "@aws-crypto/client-browser": "file:../client-browser",
         "@aws-sdk/karma-credential-loader": "3.1.0",
         "@aws-sdk/util-base64-browser": "3.1.0",
-        "@aws-sdk/util-utf8-browser": "3.1.0",
+        "@aws-sdk/util-utf8-browser": "3.12.0",
         "@trust/keyto": "^1.0.1",
         "@types/got": "^9.6.9",
         "@types/stream-to-promise": "^2.2.0",
@@ -26861,7 +26861,7 @@
         "@aws-crypto/raw-keyring": "file:../raw-keyring",
         "@aws-crypto/serialize": "file:../serialize",
         "@aws-crypto/web-crypto-backend": "file:../web-crypto-backend",
-        "@aws-sdk/util-utf8-browser": "3.1.0",
+        "@aws-sdk/util-utf8-browser": "3.12.0",
         "tslib": "^1.11.1"
       }
     },
@@ -27495,9 +27495,9 @@
       }
     },
     "@aws-sdk/util-utf8-browser": {
-      "version": "3.1.0",
-      "resolved": "https://registry.npmjs.org/@aws-sdk/util-utf8-browser/-/util-utf8-browser-3.1.0.tgz",
-      "integrity": "sha512-vJP20me+Wc1RJHq+Y+gFD25aWhbQte+Qkyh3SOKQ+YvNaMcaeVwOV7b3Y3ItBuMdutHLJWmbJ2wF6dhhpy1kOA==",
+      "version": "3.12.0",
+      "resolved": "https://registry.npmjs.org/@aws-sdk/util-utf8-browser/-/util-utf8-browser-3.12.0.tgz",
+      "integrity": "sha512-gfchf9e1qbpYgxgEcUV6+KpVBNJjdqLAPMYHLytCLeMh/Mr5NY+xXefnQz0FhAqhz8lJ/vuDvtTWHodSofArEw==",
       "requires": {
         "tslib": "^1.8.0"
       }