diff --git a/packages/auth/package.json b/packages/auth/package.json
index a452299d08..020acd7cd2 100644
--- a/packages/auth/package.json
+++ b/packages/auth/package.json
@@ -30,7 +30,7 @@
     "@graphql-tools/schema": "^10.0.3",
     "@interledger/http-signature-utils": "2.0.2",
     "@interledger/open-payments": "6.8.0",
-    "@interledger/openapi": "1.2.1",
+    "@interledger/openapi": "2.0.1",
     "@koa/cors": "^5.0.0",
     "@koa/router": "^12.0.0",
     "ajv": "^8.12.0",
diff --git a/packages/auth/src/index.ts b/packages/auth/src/index.ts
index a1daa2868d..c71d04cded 100644
--- a/packages/auth/src/index.ts
+++ b/packages/auth/src/index.ts
@@ -33,7 +33,13 @@ export function initIocContainer(
   container.singleton('logger', async (deps: IocContract<AppServices>) => {
     const config = await deps.use('config')
     const logger = createLogger({
-      level: config.logLevel
+      level: config.logLevel,
+      redact: [
+        'grant.continueToken',
+        'headers.authorization',
+        'accessToken.value',
+        'requestBody.access_token'
+      ]
     })
     return logger
   })
diff --git a/packages/auth/src/shared/gnapErrors.ts b/packages/auth/src/shared/gnapErrors.ts
index d0d6ce4208..947f7eaf94 100644
--- a/packages/auth/src/shared/gnapErrors.ts
+++ b/packages/auth/src/shared/gnapErrors.ts
@@ -1,5 +1,5 @@
 import { AppContext } from '../app'
-
+import { OpenAPIValidatorMiddlewareError } from '@interledger/openapi'
 export enum GNAPErrorCode {
   InvalidRequest = 'invalid_request',
   InvalidClient = 'invalid_client',
@@ -54,17 +54,30 @@ export async function gnapServerErrorMiddleware(
           message: err.message,
           requestBody: ctx.request.body
         },
-        'Received error when handling GNAP request'
+        'Received error when handling Open Payments GNAP request'
       )
 
       ctx.throw(err.status, err.code, {
         error: { code: err.code, description: err.message }
       })
+    } else if (err instanceof OpenAPIValidatorMiddlewareError) {
+      const finalStatus = err.status || 400
+
+      logger.info(
+        {
+          ...baseLog,
+          message: err.message,
+          status: finalStatus
+        },
+        'Received OpenAPI validation error when handling Open Payments GNAP request'
+      )
+
+      ctx.throw(finalStatus, err.message)
     }
 
     logger.error(
       { ...baseLog, err },
-      'Received unhandled error in GNAP request'
+      'Received unhandled error in Open Payments GNAP request'
     )
     ctx.throw(500)
   }
diff --git a/packages/auth/src/signature/middleware.ts b/packages/auth/src/signature/middleware.ts
index 5630e37d50..1b8e63c0c5 100644
--- a/packages/auth/src/signature/middleware.ts
+++ b/packages/auth/src/signature/middleware.ts
@@ -161,6 +161,10 @@ export async function tokenHttpsigMiddleware(
   }
 
   if (!accessToken.grant) {
+    const logger = await ctx.container.use('logger')
+    logger.error(
+      `access token with management id ${ctx.params['id']} has no grant associated with it.`
+    )
     throw new GNAPServerRouteError(
       500,
       GNAPErrorCode.RequestDenied,
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 01f9fdee5f..f5bbe92d16 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -148,8 +148,8 @@ importers:
         specifier: 6.8.0
         version: 6.8.0
       '@interledger/openapi':
-        specifier: 1.2.1
-        version: 1.2.1
+        specifier: 2.0.1
+        version: 2.0.1
       '@koa/cors':
         specifier: ^5.0.0
         version: 5.0.0
@@ -4148,7 +4148,7 @@ packages:
       '@apidevtools/json-schema-ref-parser': 10.1.0
       ajv: 8.12.0
       ajv-formats: 2.1.1(ajv@8.12.0)
-      koa: 2.15.2
+      koa: 2.15.3
       openapi-default-setter: 12.1.3
       openapi-request-coercer: 12.1.3
       openapi-request-validator: 12.1.3
@@ -12628,6 +12628,7 @@ packages:
       vary: 1.1.2
     transitivePeerDependencies:
       - supports-color
+    dev: false
 
   /koa@2.15.3:
     resolution: {integrity: sha512-j/8tY9j5t+GVMLeioLaxweJiKUayFhlGqNTzf2ZGwL0ZCQijd2RLHK0SLW5Tsko8YyyqCZC2cojIb0/s62qTAg==}
@@ -12658,7 +12659,6 @@ packages:
       vary: 1.1.2
     transitivePeerDependencies:
       - supports-color
-    dev: true
 
   /language-subtag-registry@0.3.22:
     resolution: {integrity: sha512-tN0MCzyWnoz/4nHS6uxdlFWoUZT7ABptwKPQ52Ea7URk6vll88bWBVhodtnlfEuCcKWNGoc+uGbw1cwa9IKh/w==}