diff --git a/lavamoat/browserify/beta/policy.json b/lavamoat/browserify/beta/policy.json
index d5c71923eebf..ef74e34b1609 100644
--- a/lavamoat/browserify/beta/policy.json
+++ b/lavamoat/browserify/beta/policy.json
@@ -2296,16 +2296,27 @@
       "packages": {
         "@metamask/base-controller": true,
         "@metamask/controller-utils": true,
-        "@metamask/eth-sig-util": true,
         "@metamask/keyring-controller": true,
         "@metamask/logging-controller": true,
         "@metamask/message-manager>jsonschema": true,
+        "@metamask/signature-controller>@metamask/eth-sig-util": true,
         "@metamask/utils": true,
         "browserify>buffer": true,
         "uuid": true,
         "webpack>events": true
       }
     },
+    "@metamask/signature-controller>@metamask/eth-sig-util": {
+      "packages": {
+        "@ethereumjs/tx>@ethereumjs/util": true,
+        "@ethereumjs/tx>ethereum-cryptography": true,
+        "@metamask/abi-utils": true,
+        "@metamask/eth-sig-util>tweetnacl": true,
+        "@metamask/utils": true,
+        "@metamask/utils>@scure/base": true,
+        "browserify>buffer": true
+      }
+    },
     "@metamask/smart-transactions-controller": {
       "globals": {
         "URLSearchParams": true,
diff --git a/lavamoat/browserify/flask/policy.json b/lavamoat/browserify/flask/policy.json
index d5c71923eebf..ef74e34b1609 100644
--- a/lavamoat/browserify/flask/policy.json
+++ b/lavamoat/browserify/flask/policy.json
@@ -2296,16 +2296,27 @@
       "packages": {
         "@metamask/base-controller": true,
         "@metamask/controller-utils": true,
-        "@metamask/eth-sig-util": true,
         "@metamask/keyring-controller": true,
         "@metamask/logging-controller": true,
         "@metamask/message-manager>jsonschema": true,
+        "@metamask/signature-controller>@metamask/eth-sig-util": true,
         "@metamask/utils": true,
         "browserify>buffer": true,
         "uuid": true,
         "webpack>events": true
       }
     },
+    "@metamask/signature-controller>@metamask/eth-sig-util": {
+      "packages": {
+        "@ethereumjs/tx>@ethereumjs/util": true,
+        "@ethereumjs/tx>ethereum-cryptography": true,
+        "@metamask/abi-utils": true,
+        "@metamask/eth-sig-util>tweetnacl": true,
+        "@metamask/utils": true,
+        "@metamask/utils>@scure/base": true,
+        "browserify>buffer": true
+      }
+    },
     "@metamask/smart-transactions-controller": {
       "globals": {
         "URLSearchParams": true,
diff --git a/lavamoat/browserify/main/policy.json b/lavamoat/browserify/main/policy.json
index d5c71923eebf..ef74e34b1609 100644
--- a/lavamoat/browserify/main/policy.json
+++ b/lavamoat/browserify/main/policy.json
@@ -2296,16 +2296,27 @@
       "packages": {
         "@metamask/base-controller": true,
         "@metamask/controller-utils": true,
-        "@metamask/eth-sig-util": true,
         "@metamask/keyring-controller": true,
         "@metamask/logging-controller": true,
         "@metamask/message-manager>jsonschema": true,
+        "@metamask/signature-controller>@metamask/eth-sig-util": true,
         "@metamask/utils": true,
         "browserify>buffer": true,
         "uuid": true,
         "webpack>events": true
       }
     },
+    "@metamask/signature-controller>@metamask/eth-sig-util": {
+      "packages": {
+        "@ethereumjs/tx>@ethereumjs/util": true,
+        "@ethereumjs/tx>ethereum-cryptography": true,
+        "@metamask/abi-utils": true,
+        "@metamask/eth-sig-util>tweetnacl": true,
+        "@metamask/utils": true,
+        "@metamask/utils>@scure/base": true,
+        "browserify>buffer": true
+      }
+    },
     "@metamask/smart-transactions-controller": {
       "globals": {
         "URLSearchParams": true,
diff --git a/lavamoat/browserify/mmi/policy.json b/lavamoat/browserify/mmi/policy.json
index 230d55331aae..14f20df0c065 100644
--- a/lavamoat/browserify/mmi/policy.json
+++ b/lavamoat/browserify/mmi/policy.json
@@ -2388,16 +2388,27 @@
       "packages": {
         "@metamask/base-controller": true,
         "@metamask/controller-utils": true,
-        "@metamask/eth-sig-util": true,
         "@metamask/keyring-controller": true,
         "@metamask/logging-controller": true,
         "@metamask/message-manager>jsonschema": true,
+        "@metamask/signature-controller>@metamask/eth-sig-util": true,
         "@metamask/utils": true,
         "browserify>buffer": true,
         "uuid": true,
         "webpack>events": true
       }
     },
+    "@metamask/signature-controller>@metamask/eth-sig-util": {
+      "packages": {
+        "@ethereumjs/tx>@ethereumjs/util": true,
+        "@ethereumjs/tx>ethereum-cryptography": true,
+        "@metamask/abi-utils": true,
+        "@metamask/eth-sig-util>tweetnacl": true,
+        "@metamask/utils": true,
+        "@metamask/utils>@scure/base": true,
+        "browserify>buffer": true
+      }
+    },
     "@metamask/smart-transactions-controller": {
       "globals": {
         "URLSearchParams": true,
diff --git a/package.json b/package.json
index 63f00531d939..ff14f6220131 100644
--- a/package.json
+++ b/package.json
@@ -356,7 +356,7 @@
     "@metamask/safe-event-emitter": "^3.1.1",
     "@metamask/scure-bip39": "^2.0.3",
     "@metamask/selected-network-controller": "^18.0.2",
-    "@metamask/signature-controller": "^20.0.0",
+    "@metamask/signature-controller": "^20.1.0",
     "@metamask/smart-transactions-controller": "^13.0.0",
     "@metamask/snaps-controllers": "^9.11.1",
     "@metamask/snaps-execution-environments": "^6.9.1",
diff --git a/yarn.lock b/yarn.lock
index c2382bcab48d..79fac2cfd8b0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5289,6 +5289,20 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@metamask/eth-sig-util@npm:^8.0.0":
+  version: 8.0.0
+  resolution: "@metamask/eth-sig-util@npm:8.0.0"
+  dependencies:
+    "@ethereumjs/util": "npm:^8.1.0"
+    "@metamask/abi-utils": "npm:^2.0.4"
+    "@metamask/utils": "npm:^9.0.0"
+    "@scure/base": "npm:~1.1.3"
+    ethereum-cryptography: "npm:^2.1.2"
+    tweetnacl: "npm:^1.0.3"
+  checksum: 10/5de92bc59df31bcf417ecbdfd2b47f15c21b29454f45108513c55d9c005b7cb51373e9d254bd97533603ab7c7758fdf8fc5159612f366b05f92ebe5beb6d75d8
+  languageName: node
+  linkType: hard
+
 "@metamask/eth-simple-keyring@npm:^6.0.5":
   version: 6.0.5
   resolution: "@metamask/eth-simple-keyring@npm:6.0.5"
@@ -6143,13 +6157,13 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@metamask/signature-controller@npm:^20.0.0":
-  version: 20.0.0
-  resolution: "@metamask/signature-controller@npm:20.0.0"
+"@metamask/signature-controller@npm:^20.1.0":
+  version: 20.1.0
+  resolution: "@metamask/signature-controller@npm:20.1.0"
   dependencies:
     "@metamask/base-controller": "npm:^7.0.1"
     "@metamask/controller-utils": "npm:^11.3.0"
-    "@metamask/eth-sig-util": "npm:^7.0.1"
+    "@metamask/eth-sig-util": "npm:^8.0.0"
     "@metamask/utils": "npm:^9.1.0"
     jsonschema: "npm:^1.2.4"
     lodash: "npm:^4.17.21"
@@ -6158,7 +6172,7 @@ __metadata:
     "@metamask/approval-controller": ^7.0.0
     "@metamask/keyring-controller": ^17.0.0
     "@metamask/logging-controller": ^6.0.0
-  checksum: 10/5647e362b4478d9cdb9f04027d7bad950efbe310496fc0347a92649a084bb92fc92a7fc5f911f8835e0d6b4e7ed6cf572594a79a57a31240948b87dd2267cdf8
+  checksum: 10/0e79d554e01cd1af6edd4543b848c51d93701296c71569d5c7d3814f7b500d2ef52f9776ba777b55a6dc65c2e9803e72fc4f82eeb89a81585416b7bb36b776a2
   languageName: node
   linkType: hard
 
@@ -25999,7 +26013,7 @@ __metadata:
     "@metamask/safe-event-emitter": "npm:^3.1.1"
     "@metamask/scure-bip39": "npm:^2.0.3"
     "@metamask/selected-network-controller": "npm:^18.0.2"
-    "@metamask/signature-controller": "npm:^20.0.0"
+    "@metamask/signature-controller": "npm:^20.1.0"
     "@metamask/smart-transactions-controller": "npm:^13.0.0"
     "@metamask/snaps-controllers": "npm:^9.11.1"
     "@metamask/snaps-execution-environments": "npm:^6.9.1"