diff --git a/nix/sources.json b/nix/sources.json
index 9d3ad7d..b1099da 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -1,14 +1,14 @@
 {
     "cardano-node": {
-        "branch": "refs/tags/1.33.0",
+        "branch": "refs/tags/1.34.0",
         "description": "The core component that is used to participate in a Cardano decentralised blockchain.",
         "homepage": "https://cardano.org",
         "owner": "input-output-hk",
         "repo": "cardano-node",
-        "rev": "814df2c146f5d56f8c35a681fe75e85b905aed5d",
-        "sha256": "1hr00wqzmcyc3x0kp2hyw78rfmimf6z4zd4vv85b9zv3nqbjgrik",
+        "rev": "c23d5d319cd3276575c6ac32458516232e8d2c48",
+        "sha256": "1hnn21snprbs8c57y6rfqgkv3vxh96s6cbfydh83blgw31gfhxfq",
         "type": "tarball",
-        "url": "https://github.com/input-output-hk/cardano-node/archive/814df2c146f5d56f8c35a681fe75e85b905aed5d.tar.gz",
+        "url": "https://github.com/input-output-hk/cardano-node/archive/c23d5d319cd3276575c6ac32458516232e8d2c48.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "daedalus": {