diff --git a/libraries/js/package-lock.json b/libraries/js/package-lock.json
index 7a46a89..db02db5 100644
--- a/libraries/js/package-lock.json
+++ b/libraries/js/package-lock.json
@@ -17,7 +17,7 @@
         "@digitalcredentials/vc": "^9.0.1",
         "@polkadot/keyring": "^13.2.2",
         "@polkadot/types": "^14.2.2",
-        "@polkadot/types-codec": "^14.2.2",
+        "@polkadot/types-codec": "^15.3.1",
         "@polkadot/util": "^13.2.2",
         "@polkadot/util-crypto": "^13.2.2",
         "base-x": "^5.0.0",
@@ -5359,11 +5359,10 @@
         "node": ">=18"
       }
     },
-    "node_modules/@polkadot/types-codec": {
+    "node_modules/@polkadot/types-augment/node_modules/@polkadot/types-codec": {
       "version": "14.2.3",
       "resolved": "https://registry.npmjs.org/@polkadot/types-codec/-/types-codec-14.2.3.tgz",
       "integrity": "sha512-Rz2SgKIGgRNkuLfjLzvwpxeJ+b+qls8Jdtt3rXX0/KB11rdazpLvw1lt07LJnMYWDRaLC/LHStskE0ekft/kVg==",
-      "license": "Apache-2.0",
       "dependencies": {
         "@polkadot/util": "^13.2.2",
         "@polkadot/x-bigint": "^13.2.2",
@@ -5373,6 +5372,83 @@
         "node": ">=18"
       }
     },
+    "node_modules/@polkadot/types-codec": {
+      "version": "15.3.1",
+      "resolved": "https://registry.npmjs.org/@polkadot/types-codec/-/types-codec-15.3.1.tgz",
+      "integrity": "sha512-nqLFAZoHnwKFNj8ZRBF2X8O+yZR9y0r6tgOgyj3LPF8r0JvakVwmZ2C1AIAFr6YO6LeFfZh4kkkqRGgReGEIMA==",
+      "dependencies": {
+        "@polkadot/util": "^13.3.1",
+        "@polkadot/x-bigint": "^13.3.1",
+        "tslib": "^2.8.1"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@polkadot/types-codec/node_modules/@polkadot/util": {
+      "version": "13.3.1",
+      "resolved": "https://registry.npmjs.org/@polkadot/util/-/util-13.3.1.tgz",
+      "integrity": "sha512-5crLP/rUZOJzuo/W8t73J8PxpibJ5vrxY57rR6V+mIpCZd1ORiw0wxeHcV5F9Adpn7yJyuGBwxPbueNR5Rr1Zw==",
+      "dependencies": {
+        "@polkadot/x-bigint": "13.3.1",
+        "@polkadot/x-global": "13.3.1",
+        "@polkadot/x-textdecoder": "13.3.1",
+        "@polkadot/x-textencoder": "13.3.1",
+        "@types/bn.js": "^5.1.6",
+        "bn.js": "^5.2.1",
+        "tslib": "^2.8.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@polkadot/types-codec/node_modules/@polkadot/x-bigint": {
+      "version": "13.3.1",
+      "resolved": "https://registry.npmjs.org/@polkadot/x-bigint/-/x-bigint-13.3.1.tgz",
+      "integrity": "sha512-ewc708a7LUdrT92v9DsSAIbcJQBn3aR9/LavF/iyMOq5lZJyPXDSjAnskfMs818R3RLCrKVKfs+aKkxt2eqo8g==",
+      "dependencies": {
+        "@polkadot/x-global": "13.3.1",
+        "tslib": "^2.8.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@polkadot/types-codec/node_modules/@polkadot/x-global": {
+      "version": "13.3.1",
+      "resolved": "https://registry.npmjs.org/@polkadot/x-global/-/x-global-13.3.1.tgz",
+      "integrity": "sha512-861TeIw49a3JvkwlUWrddfG+JaUqtFZDsemYxxZIjjcRJLrKOsoKNqHbiHi2OPrwlX8PwAA/wc5I9Q4XRQ7KEg==",
+      "dependencies": {
+        "tslib": "^2.8.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@polkadot/types-codec/node_modules/@polkadot/x-textdecoder": {
+      "version": "13.3.1",
+      "resolved": "https://registry.npmjs.org/@polkadot/x-textdecoder/-/x-textdecoder-13.3.1.tgz",
+      "integrity": "sha512-g2R9O1p0ZsNDhZ3uEBZh6fQaVLlo3yFr0YNqt15v7e9lBI4APvTJ202EINlo2jB5lz/R438/BdjEA3AL+0zUtQ==",
+      "dependencies": {
+        "@polkadot/x-global": "13.3.1",
+        "tslib": "^2.8.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@polkadot/types-codec/node_modules/@polkadot/x-textencoder": {
+      "version": "13.3.1",
+      "resolved": "https://registry.npmjs.org/@polkadot/x-textencoder/-/x-textencoder-13.3.1.tgz",
+      "integrity": "sha512-DnHLUdoKDYxekfxopuUuPB+j5Mu7Jemejcduu5gz3/89GP/sYPAu0CAVbq9B+hK1yGjBBj31eA4wkAV1oktYmg==",
+      "dependencies": {
+        "@polkadot/x-global": "13.3.1",
+        "tslib": "^2.8.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@polkadot/types-create": {
       "version": "14.2.3",
       "resolved": "https://registry.npmjs.org/@polkadot/types-create/-/types-create-14.2.3.tgz",
@@ -5387,6 +5463,32 @@
         "node": ">=18"
       }
     },
+    "node_modules/@polkadot/types-create/node_modules/@polkadot/types-codec": {
+      "version": "14.2.3",
+      "resolved": "https://registry.npmjs.org/@polkadot/types-codec/-/types-codec-14.2.3.tgz",
+      "integrity": "sha512-Rz2SgKIGgRNkuLfjLzvwpxeJ+b+qls8Jdtt3rXX0/KB11rdazpLvw1lt07LJnMYWDRaLC/LHStskE0ekft/kVg==",
+      "dependencies": {
+        "@polkadot/util": "^13.2.2",
+        "@polkadot/x-bigint": "^13.2.2",
+        "tslib": "^2.8.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@polkadot/types/node_modules/@polkadot/types-codec": {
+      "version": "14.2.3",
+      "resolved": "https://registry.npmjs.org/@polkadot/types-codec/-/types-codec-14.2.3.tgz",
+      "integrity": "sha512-Rz2SgKIGgRNkuLfjLzvwpxeJ+b+qls8Jdtt3rXX0/KB11rdazpLvw1lt07LJnMYWDRaLC/LHStskE0ekft/kVg==",
+      "dependencies": {
+        "@polkadot/util": "^13.2.2",
+        "@polkadot/x-bigint": "^13.2.2",
+        "tslib": "^2.8.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@polkadot/util": {
       "version": "13.2.2",
       "resolved": "https://registry.npmjs.org/@polkadot/util/-/util-13.2.2.tgz",
diff --git a/libraries/js/package.json b/libraries/js/package.json
index 5adff98..4730e3d 100644
--- a/libraries/js/package.json
+++ b/libraries/js/package.json
@@ -52,7 +52,7 @@
     "@digitalcredentials/vc": "^9.0.1",
     "@polkadot/keyring": "^13.2.2",
     "@polkadot/types": "^14.2.2",
-    "@polkadot/types-codec": "^14.2.2",
+    "@polkadot/types-codec": "^15.3.1",
     "@polkadot/util": "^13.2.2",
     "@polkadot/util-crypto": "^13.2.2",
     "base-x": "^5.0.0",