diff --git a/packages/backend-app-api/src/logging/WinstonLogger.test.ts b/packages/backend-app-api/src/logging/WinstonLogger.test.ts
index 06f9cdd4c3..8f60e8dae2 100644
--- a/packages/backend-app-api/src/logging/WinstonLogger.test.ts
+++ b/packages/backend-app-api/src/logging/WinstonLogger.test.ts
@@ -80,7 +80,7 @@ describe('WinstonLogger', () => {
           nested: '[REDACTED] (world) from nested object',
           null: null,
           nullProto: {
-            foo: 'hello foo', // read only prop is not redacted
+            foo: '[REDACTED] foo',
           },
         },
       }),
diff --git a/packages/backend-app-api/src/logging/WinstonLogger.ts b/packages/backend-app-api/src/logging/WinstonLogger.ts
index 3fcb4142b6..cb9d81cdf1 100644
--- a/packages/backend-app-api/src/logging/WinstonLogger.ts
+++ b/packages/backend-app-api/src/logging/WinstonLogger.ts
@@ -86,19 +86,17 @@ export class WinstonLogger implements RootLoggerService {
     let redactionPattern: RegExp | undefined = undefined;
 
     const replace = (obj: TransformableInfo) => {
-      for (const key in obj) {
-        if (Object.hasOwn(obj, key)) {
-          if (typeof obj[key] === 'object') {
-            obj[key] = replace(obj[key] as TransformableInfo);
-          } else if (typeof obj[key] === 'string') {
-            try {
-              obj[key] = obj[key]?.replace(redactionPattern, '[REDACTED]');
-            } catch {
-              /* ignore read only properties */
-            }
-          }
+      const stringifiedFields = JSON.stringify(obj, null);
+      const redacted = JSON.parse(
+        stringifiedFields.replace(redactionPattern!, '[REDACTED]'),
+      );
+
+      for (const key in redacted) {
+        if (obj && Object.hasOwn(obj, key)) {
+          obj[key] = redacted[key];
         }
       }
+
       return obj;
     };
     return {