diff --git a/apps/api-gateway/package.json b/apps/api-gateway/package.json
index 88f157e..ce8c7e1 100644
--- a/apps/api-gateway/package.json
+++ b/apps/api-gateway/package.json
@@ -24,7 +24,7 @@
     "@shipyard402/run-domain": "workspace:*",
     "@shipyard402/x402-payments": "workspace:*",
     "fastify": "5.11.2",
-    "viem": "2.55.10",
+    "viem": "2.55.16",
     "zod": "3.25.76"
   },
   "devDependencies": {
diff --git a/apps/bnb-x402-target/package.json b/apps/bnb-x402-target/package.json
index bd6b3f0..1c79386 100644
--- a/apps/bnb-x402-target/package.json
+++ b/apps/bnb-x402-target/package.json
@@ -17,7 +17,7 @@
     "@x402/evm": "2.22.0",
     "@x402/fastify": "2.22.0",
     "fastify": "5.11.2",
-    "viem": "2.55.10",
+    "viem": "2.55.16",
     "zod": "3.25.76"
   },
   "devDependencies": {
diff --git a/apps/payment-worker/package.json b/apps/payment-worker/package.json
index b04faaa..abf7d78 100644
--- a/apps/payment-worker/package.json
+++ b/apps/payment-worker/package.json
@@ -21,7 +21,7 @@
     "@shipyard402/goat-network-config": "workspace:*",
     "@shipyard402/payment-reconciliation": "workspace:*",
     "@shipyard402/persistence-postgres": "workspace:*",
-    "viem": "2.55.10",
+    "viem": "2.55.16",
     "zod": "3.25.76"
   },
   "devDependencies": {
diff --git a/apps/x402-demo-target/package.json b/apps/x402-demo-target/package.json
index 7923d09..720bf7a 100644
--- a/apps/x402-demo-target/package.json
+++ b/apps/x402-demo-target/package.json
@@ -19,7 +19,7 @@
     "@shipyard402/protected-delivery-runner": "workspace:*",
     "@shipyard402/x402-payments": "workspace:*",
     "fastify": "5.11.2",
-    "viem": "2.55.10",
+    "viem": "2.55.16",
     "zod": "3.25.76"
   },
   "devDependencies": {
diff --git a/packages/bnb-x402-client/package.json b/packages/bnb-x402-client/package.json
index ef27b05..137c46b 100644
--- a/packages/bnb-x402-client/package.json
+++ b/packages/bnb-x402-client/package.json
@@ -19,7 +19,7 @@
   "dependencies": {
     "@x402/core": "2.22.0",
     "@x402/evm": "2.22.0",
-    "viem": "2.55.10"
+    "viem": "2.55.16"
   },
   "devDependencies": {
     "@types/node": "24.3.0",
diff --git a/packages/bot-chain-adapter/package.json b/packages/bot-chain-adapter/package.json
index 216de23..300ea93 100644
--- a/packages/bot-chain-adapter/package.json
+++ b/packages/bot-chain-adapter/package.json
@@ -21,7 +21,7 @@
     "@shipyard402/goat-chain-reader": "workspace:*",
     "@shipyard402/x402-payments": "workspace:*",
     "ethers": "6.17.0",
-    "viem": "2.55.10"
+    "viem": "2.55.16"
   },
   "devDependencies": {
     "@types/node": "24.3.0",
diff --git a/packages/goat-chain-reader/package.json b/packages/goat-chain-reader/package.json
index a2ce8df..698d383 100644
--- a/packages/goat-chain-reader/package.json
+++ b/packages/goat-chain-reader/package.json
@@ -19,7 +19,7 @@
   "dependencies": {
     "@shipyard402/goat-network-config": "workspace:*",
     "@shipyard402/payment-reconciliation": "workspace:*",
-    "viem": "2.55.10"
+    "viem": "2.55.16"
   },
   "devDependencies": {
     "@types/node": "24.3.0",
diff --git a/packages/x402-payments/package.json b/packages/x402-payments/package.json
index c98bc94..78ae3cd 100644
--- a/packages/x402-payments/package.json
+++ b/packages/x402-payments/package.json
@@ -20,7 +20,7 @@
     "@shipyard402/bot-chain-network-config": "workspace:*",
     "@shipyard402/goat-network-config": "workspace:*",
     "ethers": "6.17.0",
-    "viem": "2.55.10"
+    "viem": "2.55.16"
   },
   "devDependencies": {
     "@types/node": "24.3.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 2012ca6..6e9d37e 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -81,8 +81,8 @@ importers:
         specifier: 5.11.2
         version: 5.11.2
       viem:
-        specifier: 2.55.10
-        version: 2.55.10(typescript@5.9.3)(zod@3.25.76)
+        specifier: 2.55.16
+        version: 2.55.16(typescript@5.9.3)(zod@3.25.76)
       zod:
         specifier: 3.25.76
         version: 3.25.76
@@ -115,8 +115,8 @@ importers:
         specifier: 5.11.2
         version: 5.11.2
       viem:
-        specifier: 2.55.10
-        version: 2.55.10(typescript@5.9.3)(zod@3.25.76)
+        specifier: 2.55.16
+        version: 2.55.16(typescript@5.9.3)(zod@3.25.76)
       zod:
         specifier: 3.25.76
         version: 3.25.76
@@ -219,8 +219,8 @@ importers:
         specifier: workspace:*
         version: link:../../packages/persistence-postgres
       viem:
-        specifier: 2.55.10
-        version: 2.55.10(typescript@5.9.3)(zod@3.25.76)
+        specifier: 2.55.16
+        version: 2.55.16(typescript@5.9.3)(zod@3.25.76)
       zod:
         specifier: 3.25.76
         version: 3.25.76
@@ -317,8 +317,8 @@ importers:
         specifier: 5.11.2
         version: 5.11.2
       viem:
-        specifier: 2.55.10
-        version: 2.55.10(typescript@5.9.3)(zod@3.25.76)
+        specifier: 2.55.16
+        version: 2.55.16(typescript@5.9.3)(zod@3.25.76)
       zod:
         specifier: 3.25.76
         version: 3.25.76
@@ -345,8 +345,8 @@ importers:
         specifier: 2.22.0
         version: 2.22.0(typescript@5.9.3)
       viem:
-        specifier: 2.55.10
-        version: 2.55.10(typescript@5.9.3)(zod@3.25.76)
+        specifier: 2.55.16
+        version: 2.55.16(typescript@5.9.3)(zod@3.25.76)
     devDependencies:
       '@types/node':
         specifier: 24.3.0
@@ -373,8 +373,8 @@ importers:
         specifier: 6.17.0
         version: 6.17.0
       viem:
-        specifier: 2.55.10
-        version: 2.55.10(typescript@5.9.3)(zod@3.25.76)
+        specifier: 2.55.16
+        version: 2.55.16(typescript@5.9.3)(zod@3.25.76)
     devDependencies:
       '@types/node':
         specifier: 24.3.0
@@ -433,8 +433,8 @@ importers:
         specifier: workspace:*
         version: link:../payment-reconciliation
       viem:
-        specifier: 2.55.10
-        version: 2.55.10(typescript@5.9.3)(zod@3.25.76)
+        specifier: 2.55.16
+        version: 2.55.16(typescript@5.9.3)(zod@3.25.76)
     devDependencies:
       '@types/node':
         specifier: 24.3.0
@@ -698,8 +698,8 @@ importers:
         specifier: 6.17.0
         version: 6.17.0
       viem:
-        specifier: 2.55.10
-        version: 2.55.10(typescript@5.9.3)(zod@3.25.76)
+        specifier: 2.55.16
+        version: 2.55.16(typescript@5.9.3)(zod@3.25.76)
     devDependencies:
       '@types/node':
         specifier: 24.3.0
@@ -1574,6 +1574,10 @@ packages:
     resolution: {integrity: sha512-k11yZxZg+t+gWvBbIswW0yoJlu8cHOC7dhunwOzoWH/mXGBiYyR4YY6hAEK/3EUs4UpB8la1RfdRpeGsFHkWsA==}
     engines: {node: ^14.21.3 || >=16}
 
+  '@noble/curves@1.9.7':
+    resolution: {integrity: sha512-gbKGcRUYIjA3/zCCNaWDciTMFI0dCkvou3TL8Zmy5Nc7sJ47a0jtOeZoTaMxkuqRo9cRhjOdZJXegxYE5FN/xw==}
+    engines: {node: ^14.21.3 || >=16}
+
   '@noble/hashes@1.3.2':
     resolution: {integrity: sha512-MVC8EAQp7MvEcm30KWENFjgR+Mkmf+D189XJTkFIlwohU5hcBbn1ZkKq7KVTi2Hme3PMGF390DaL52beVrIihQ==}
     engines: {node: '>= 16'}
@@ -3786,8 +3790,8 @@ packages:
     resolution: {integrity: sha512-BNGbWLfd0eUPabhkXUVm0j8uuvREyTh5ovRa/dyow/BqAbZJyC+5fU+IzQOzmAKzYqYRAISoRhdQr3eIZ/PXqg==}
     engines: {node: '>= 0.8'}
 
-  viem@2.55.10:
-    resolution: {integrity: sha512-Q9Ba+/ma81U2M5o5P2AQ7Ux8rTIwmCZvUcr8rKdQ22bV0IBFHllM2m5gWDP8hFaUN2nH2oW3QG44amRazflYNQ==}
+  viem@2.55.16:
+    resolution: {integrity: sha512-bKs/0PNIkiaG45ZM0ERddHSVtku7hvyebK2i3bMLuyJQevh15tpDh3MiE3PhLjx5kxGrvizaXQw67gWc9Jl7fQ==}
     peerDependencies:
       typescript: '>=5.0.4'
     peerDependenciesMeta:
@@ -4668,6 +4672,10 @@ snapshots:
     dependencies:
       '@noble/hashes': 1.8.0
 
+  '@noble/curves@1.9.7':
+    dependencies:
+      '@noble/hashes': 1.8.0
+
   '@noble/hashes@1.3.2': {}
 
   '@noble/hashes@1.8.0': {}
@@ -4770,7 +4778,7 @@ snapshots:
 
   '@scure/bip32@1.7.0':
     dependencies:
-      '@noble/curves': 1.9.1
+      '@noble/curves': 1.9.7
       '@noble/hashes': 1.8.0
       '@scure/base': 1.2.6
 
@@ -4786,12 +4794,12 @@ snapshots:
       '@noble/hashes': 1.8.0
       apg-js: 4.4.0
 
-  '@signinwithethereum/siwe@4.2.0(ethers@6.17.0)(viem@2.55.10(typescript@5.9.3)(zod@3.25.76))':
+  '@signinwithethereum/siwe@4.2.0(ethers@6.17.0)(viem@2.55.16(typescript@5.9.3)(zod@3.25.76))':
     dependencies:
       '@signinwithethereum/siwe-parser': 4.2.0
     optionalDependencies:
       ethers: 6.17.0
-      viem: 2.55.10(typescript@5.9.3)(zod@3.25.76)
+      viem: 2.55.16(typescript@5.9.3)(zod@3.25.76)
 
   '@sindresorhus/merge-streams@4.0.0': {}
 
@@ -4943,7 +4951,7 @@ snapshots:
   '@x402/evm@2.22.0(typescript@5.9.3)':
     dependencies:
       '@x402/core': 2.22.0
-      viem: 2.55.10(typescript@5.9.3)(zod@3.25.76)
+      viem: 2.55.16(typescript@5.9.3)(zod@3.25.76)
       zod: 3.25.76
     transitivePeerDependencies:
       - bufferutil
@@ -4952,14 +4960,14 @@ snapshots:
 
   '@x402/extensions@2.22.0(ethers@6.17.0)(typescript@5.9.3)':
     dependencies:
-      '@noble/curves': 1.9.1
+      '@noble/curves': 1.9.7
       '@scure/base': 1.2.6
-      '@signinwithethereum/siwe': 4.2.0(ethers@6.17.0)(viem@2.55.10(typescript@5.9.3)(zod@3.25.76))
+      '@signinwithethereum/siwe': 4.2.0(ethers@6.17.0)(viem@2.55.16(typescript@5.9.3)(zod@3.25.76))
       '@x402/core': 2.22.0
       ajv: 8.20.0
       jose: 5.10.0
       tweetnacl: 1.0.3
-      viem: 2.55.10(typescript@5.9.3)(zod@3.25.76)
+      viem: 2.55.16(typescript@5.9.3)(zod@3.25.76)
       zod: 3.25.76
     transitivePeerDependencies:
       - bufferutil
@@ -6859,7 +6867,7 @@ snapshots:
 
   vary@1.1.2: {}
 
-  viem@2.55.10(typescript@5.9.3)(zod@3.25.76):
+  viem@2.55.16(typescript@5.9.3)(zod@3.25.76):
     dependencies:
       '@noble/curves': 1.9.1
       '@noble/hashes': 1.8.0