diff --git a/nix/sources.json b/nix/sources.json
index f3f3dc9..fd6d1ea 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -1,14 +1,14 @@
 {
     "cardano-node": {
-        "branch": "refs/tags/1.34.1",
+        "branch": "refs/tags/1.35.3",
         "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": "73f9a746362695dc2cb63ba757fbcabb81733d23",
-        "sha256": "1hh53whcj5y9kw4qpkiza7rmkniz18r493vv4dzl1a8r5fy3b2bv",
+        "rev": "950c4e222086fed5ca53564e642434ce9307b0b9",
+        "sha256": "020fwimsm24yblr1fmnwx240wj8r3x715p89cpjgnnd8axwf32p0",
         "type": "tarball",
-        "url": "https://github.com/input-output-hk/cardano-node/archive/73f9a746362695dc2cb63ba757fbcabb81733d23.tar.gz",
+        "url": "https://github.com/input-output-hk/cardano-node/archive/950c4e222086fed5ca53564e642434ce9307b0b9.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "daedalus": {