diff --git a/nix/sources.json b/nix/sources.json
index ba04d01..67b93f5 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -1,14 +1,14 @@
 {
     "cardano-node": {
-        "branch": "refs/tags/1.30.1",
+        "branch": "refs/tags/1.31.0",
         "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": "0fb43f4e3da8b225f4f86557aed90a183981a64f",
-        "sha256": "0mkir1pg78hp7adxgb8cz6jj4izs07np23fxxnwhkvf0ql92nan7",
+        "rev": "2cbe363874d0261bc62f52185cf23ed492cf4859",
+        "sha256": "0x5j0cynlc9kiyj9w7casax477z3fb74pfsyfl373dn7rv1grg4d",
         "type": "tarball",
-        "url": "https://github.com/input-output-hk/cardano-node/archive/0fb43f4e3da8b225f4f86557aed90a183981a64f.tar.gz",
+        "url": "https://github.com/input-output-hk/cardano-node/archive/2cbe363874d0261bc62f52185cf23ed492cf4859.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "daedalus": {