diff --git a/basic/22-zk-snarkjs/circom2/verifier.sol b/basic/22-zk-snarkjs/circom2/verifier.sol
index 524199137..f574cd14d 100644
--- a/basic/22-zk-snarkjs/circom2/verifier.sol
+++ b/basic/22-zk-snarkjs/circom2/verifier.sol
@@ -152,7 +152,7 @@ contract PlonkVerifier {
             
             ///////
             // Computes the inverse of an array of values
-            // See https://vitalik.ca/general/2018/07/21/starks_part_3.html in section where explain fields operations
+            // See https://vitalik.eth.limo/general/2018/07/21/starks_part_3.html in section where explain fields operations
             //////
             function inverseArray(pVals, n) {
     
diff --git a/basic/26-quadratic-vote&gitcoin/README-CN.md b/basic/26-quadratic-vote&gitcoin/README-CN.md
index 9088ca124..12bc6df07 100644
--- a/basic/26-quadratic-vote&gitcoin/README-CN.md
+++ b/basic/26-quadratic-vote&gitcoin/README-CN.md
@@ -79,7 +79,7 @@ cost to the voter = 2^(n-1)
 
 ### financingTool
 
-![quadratic_funding.png](https://vitalik.ca/images/qv-files/quadratic_funding.png)
+![quadratic_funding.png](https://vitalik.eth.limo/images/qv-files/quadratic_funding.png)
 
 每个用户针对某个提案投票都是总金额的开平方
 
@@ -160,7 +160,7 @@ struct UserVote {//每个用户每个提案会有一个实例
 
 ## 参考资料
 
-- [Quadratic Payments: A Primer](https://vitalik.ca/general/2019/12/07/quadratic.html)
+- [Quadratic Payments: A Primer](https://vitalik.eth.limo/general/2019/12/07/quadratic.html)
 - [二次方投票和二次方资助](https://www.matataki.io/p/6113)
 - [视频](https://www.bilibili.com/video/BV1Y5411w77b/)
 - [gitcoin](https://gitcoin.co/blog/gitcoin-grants-quadratic-funding-for-the-world/)
diff --git a/basic/26-quadratic-vote&gitcoin/README.md b/basic/26-quadratic-vote&gitcoin/README.md
index 68d38f0e2..eabd41bba 100644
--- a/basic/26-quadratic-vote&gitcoin/README.md
+++ b/basic/26-quadratic-vote&gitcoin/README.md
@@ -81,7 +81,7 @@ Using both eth and Token for voting is not implemented for now.
 
 ### FinancingTool
 
-![quadratic_funding.png](https://vitalik.ca/images/qv-files/quadratic_funding.png)
+![quadratic_funding.png](https://vitalik.eth.limo/images/qv-files/quadratic_funding.png)
 
 Each user vote on a proposal is the square root of the total amount ().
 
@@ -161,7 +161,7 @@ Case: Each person can donate to multiple proposals within a certain period of ti
 
 ## Reference
 
-- [Quadratic Payments: A Primer (by vitalik)](https://vitalik.ca/general/2019/12/07/quadratic.html)
+- [Quadratic Payments: A Primer (by vitalik)](https://vitalik.eth.limo/general/2019/12/07/quadratic.html)
 - [Quadratic vote and quadratic funde (from zhihu)](https://www.matataki.io/p/6113)
 - [video intro](https://www.bilibili.com/video/BV1Y5411w77b/)
 - [gitcoin](https://gitcoin.co/blog/gitcoin-grants-quadratic-funding-for-the-world/)
diff --git a/defi/RAI/README.md b/defi/RAI/README.md
index 3be3d23ad..4c744cb9a 100644
--- a/defi/RAI/README.md
+++ b/defi/RAI/README.md
@@ -6,7 +6,7 @@ RAI具有非法币锚定、完全去中心化、以及最小化治理的极致
 - site: <https://reflexer.finance/>
 
 V神和Dankrad都有文章介绍RAI的机制：
-- [Two thought experiments to evaluate automated stablecoins](https://vitalik.ca/general/2022/05/25/stable.html)
+- [Two thought experiments to evaluate automated stablecoins](https://vitalik.eth.limo/general/2022/05/25/stable.html)
 - [RAI -- one of the coolest experiments in crypto](https://dankradfeist.de/ethereum/2023/01/31/rai-crypto-experiment.html)
 
 RAI系统的这一套机制，正符合货币主义奠基人、诺贝尔经济学奖获得者米尔顿·弗里德曼理想情况下对美联储的预期。弗里德曼认为，"Abolish the FED.  Replace it with a computer."（这同时也是Reflexer社区的重要Meme）。
diff --git a/nft/SBT/readme.md b/nft/SBT/readme.md
index b393089fe..3b2f28faf 100644
--- a/nft/SBT/readme.md
+++ b/nft/SBT/readme.md
@@ -52,7 +52,7 @@ https://medium.com/infinitism/erc-4337-account-abstraction-without-ethereum-prot
 
 
 ## 参考链接
-- [vitalik文章](https://vitalik.ca/general/2022/01/26/soulbound.html)
+- [vitalik文章](https://vitalik.eth.limo/general/2022/01/26/soulbound.html)
 - [ Decentralized Society: Finding Web3's Soul ](https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4105763)
 - [SBT综述](https://mirror.xyz/0x07599B7E947A4F6240F826F41768F76149F490D5/fbYA4BbpB8zxbFqO2FpyLEFprXMqhSfQQQIo_lU8LGE)
 - [DID总结文章1]（https://docs.qq.com/doc/DVGJFUWN6RGRZdWJo）