diff --git a/nix/sources.json b/nix/sources.json
index 0edff55..c6646dd 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -1,14 +1,14 @@
 {
     "cardano-node": {
-        "branch": "refs/tags/1.26.2",
+        "branch": "refs/tags/1.27.0",
         "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": "3531289c9f79eab7ac5d3272ce6e6821504fec4c",
-        "sha256": "17zr2lhnrly6gqb1hxf3cjwfw1iz8s85hhhdiivb5ax7fkrrp8pp",
+        "rev": "8fe46140a52810b6ca456be01d652ca08fe730bf",
+        "sha256": "1c9zc899wlgicrs49i33l0bwb554acsavzh1vcyhnxmpm0dmy8vj",
         "type": "tarball",
-        "url": "https://github.com/input-output-hk/cardano-node/archive/3531289c9f79eab7ac5d3272ce6e6821504fec4c.tar.gz",
+        "url": "https://github.com/input-output-hk/cardano-node/archive/8fe46140a52810b6ca456be01d652ca08fe730bf.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "daedalus": {