diff --git a/package-lock.json b/package-lock.json
index 4168bb8..fd047a8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,6 +12,7 @@
         "@transmute/cose": "^0.1.1",
         "@transmute/vc-jwt-sd": "^0.1.3",
         "ajv": "^8.12.0",
+        "ajv-formats": "^3.0.1",
         "jose": "^5.2.0",
         "json-pointer": "^0.6.2",
         "moment": "^2.30.1",
@@ -1990,6 +1991,22 @@
         "url": "https://github.com/sponsors/epoberezkin"
       }
     },
+    "node_modules/ajv-formats": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/ajv-formats/-/ajv-formats-3.0.1.tgz",
+      "integrity": "sha512-8iUql50EUR+uUcdRQ3HDqa6EVyo3docL8g5WJ3FNcWmu62IbkGUue/pEyLBW8VGKKucTPgqeks4fIU1DA4yowQ==",
+      "dependencies": {
+        "ajv": "^8.0.0"
+      },
+      "peerDependencies": {
+        "ajv": "^8.0.0"
+      },
+      "peerDependenciesMeta": {
+        "ajv": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/ansi-escapes": {
       "version": "4.3.2",
       "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-4.3.2.tgz",
@@ -7046,6 +7063,14 @@
         "uri-js": "^4.2.2"
       }
     },
+    "ajv-formats": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/ajv-formats/-/ajv-formats-3.0.1.tgz",
+      "integrity": "sha512-8iUql50EUR+uUcdRQ3HDqa6EVyo3docL8g5WJ3FNcWmu62IbkGUue/pEyLBW8VGKKucTPgqeks4fIU1DA4yowQ==",
+      "requires": {
+        "ajv": "^8.0.0"
+      }
+    },
     "ansi-escapes": {
       "version": "4.3.2",
       "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-4.3.2.tgz",
diff --git a/package.json b/package.json
index 9078607..2248be1 100644
--- a/package.json
+++ b/package.json
@@ -46,6 +46,7 @@
     "@transmute/cose": "^0.1.1",
     "@transmute/vc-jwt-sd": "^0.1.3",
     "ajv": "^8.12.0",
+    "ajv-formats": "^3.0.1",
     "jose": "^5.2.0",
     "json-pointer": "^0.6.2",
     "moment": "^2.30.1",
diff --git a/src/cr1/validator/ajv.ts b/src/cr1/validator/ajv.ts
index 87200bc..9df4d23 100644
--- a/src/cr1/validator/ajv.ts
+++ b/src/cr1/validator/ajv.ts
@@ -1,5 +1,11 @@
 import Ajv from 'ajv/dist/2020'
 
-export const ajv = new Ajv({
+import addFormats from 'ajv-formats'
+
+const ajv = new Ajv({
   strict: false,
 })
+
+addFormats(ajv)
+
+export { ajv }