diff --git a/parser.nix b/parser.nix
index c9520bf..43252e4 100644
--- a/parser.nix
+++ b/parser.nix
@@ -13,10 +13,12 @@ in
     src = fetchFromGitHub {
       owner = "demostf";
       repo = "parser";
-      rev = "v0.5.1";
-      hash = "sha256-H6ypYeZRxaMP/qRZoO2bp7OzmePMNUaBbcswsa0b9Hs=";
+      rev = "2449c9666019a99b791f84d3c0c38b6b7c71ad20";
+      hash = "sha256-V0rm9pVfZUGPrD3raOJ7O6EQkbxVG6cIquWvdFkGPgM=";
     };
 
+    doCheck = false;
+
     cargoLock = {
       lockFile = ./parser-Cargo.lock;
       outputHashes = {