diff --git a/src/data/plonk.sol b/src/data/plonk.sol
index 2579282..97194f1 100644
--- a/src/data/plonk.sol
+++ b/src/data/plonk.sol
@@ -136,7 +136,7 @@ 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) {
     
@@ -629,4 +629,4 @@ contract PlonkVerifier {
         }
         
     }
-}
\ No newline at end of file
+}