# Error: Invalid certificate:

**URL:** <https://forum.dfinity.org/t/error-invalid-certificate/27942>\
**Category:** Motoko\
**Created:** [February 28, 2024, 4:27am UTC](https://forum.dfinity.org/t/error-invalid-certificate/27942 "2024-02-28T04:27:57Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![aordona75](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.dfinity.org/aordona75/32/16020_2.png) [@aordona75](https://forum.dfinity.org/u/aordona75)\
**Post date:** [February 28, 2024, 4:27am UTC](https://forum.dfinity.org/t/error-invalid-certificate/27942/1 "2024-02-28T04:27:57Z")

</div>

I’m new user and below error is what I’m getting. Read a post in regard to similar issue but wasn’t able to follow. Not sure what to do next. TIA

“Uncaught (in promise) Error: Invalid certificate: Invalid signature from replica signed query: no matching node key found”

Below is what i have under the package.json:  
“devDependencies”: {  
“@dfinity/agent”: “1.0.1”,  
“@dfinity/candid”: “1.0.1”,  
“@dfinity/principal”: “1.0.1”,

DFX.jsonL  
“dfx”: “0.9.3”,  
“networks”: {  
“local”: {  
“bind”: “127.0.0.1:8000”,  
“type”: “ephemeral”,  
“replica”:{  
“subnet\_type”:“application”  
}  
}  
},

---

<div class="post-metadata">

**Author:** ![Vivienne](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.dfinity.org/vivienne/32/29170_2.png) [@Vivienne](https://forum.dfinity.org/u/Vivienne)\
**Post date:** [February 28, 2024, 8:23am UTC](https://forum.dfinity.org/t/error-invalid-certificate/27942/2 "2024-02-28T08:23:44Z")

</div>

The dfx version (read: the replica shipped with dfx 0.9.3) is ridiculously out of date. It is missing quite a lot of features that the agent expects. I suggest you update your dfx version and remove the version pin in dfx.json (`"dfx": "0.9.3"`)