diff --git a/package.json b/package.json
index e28d47043..98b21288e 100644
--- a/package.json
+++ b/package.json
@@ -110,13 +110,13 @@
     "fast-redact": "^3.0.0",
     "on-exit-leak-free": "^1.0.0",
     "pino-abstract-transport": "v0.5.0",
-    "pino-std-serializers": "^4.0.0",
+    "pino-std-serializers": "^5.0.0",
     "process-warning": "^2.0.0",
     "quick-format-unescaped": "^4.0.3",
     "real-require": "^0.1.0",
     "safe-stable-stringify": "^2.1.0",
-    "sonic-boom": "^2.2.1",
-    "thread-stream": "^0.15.1"
+    "sonic-boom": "^3.0.0",
+    "thread-stream": "^1.0.0"
   },
   "tsd": {
     "directory": "test/types"
diff --git a/test/error.test.js b/test/error.test.js
index a0da655ba..0eb0b560c 100644
--- a/test/error.test.js
+++ b/test/error.test.js
@@ -150,22 +150,6 @@ test('stack is omitted if it is not set on err', t => {
   instance[name](err)
 })
 
-test('stack is rendered as any other property if it\'s not a string', t => {
-  t.plan(3)
-  const err = new Error('myerror')
-  err.stack = null
-  const instance = pino(sink(function (chunk, enc, cb) {
-    t.ok(new Date(chunk.time) <= new Date(), 'time is greater than Date.now()')
-    delete chunk.time
-    t.equal(chunk.err.hasOwnProperty('stack'), true)
-    t.equal(chunk.err.stack, null)
-    cb()
-  }))
-
-  instance.level = name
-  instance[name](err)
-})
-
 test('correctly ignores toString on errors', async ({ same }) => {
   const err = new Error('myerror')
   err.toString = () => undefined