diff --git a/nix/sources.json b/nix/sources.json
index d764dff..c56d02f 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -1,14 +1,14 @@
 {
     "cardano-node": {
-        "branch": "nixos-21.05",
+        "branch": "refs/tags/1.29.0",
         "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": "8358cf886d2346416c23318ca24bc95d0e1529be",
-        "sha256": "0w4c5vahf1r92pgh086l7zn7hdxci4n7xfy2hq5znc7hl5dsnxc1",
+        "rev": "4c59442958072657812c6c0bb8e0b4ab85ce1ba2",
+        "sha256": "0pc26hrgdsf93h3qvp8m76axm4jspzclg6psn14mbaf1mkc1fxmx",
         "type": "tarball",
-        "url": "https://github.com/input-output-hk/cardano-node/archive/8358cf886d2346416c23318ca24bc95d0e1529be.tar.gz",
+        "url": "https://github.com/input-output-hk/cardano-node/archive/4c59442958072657812c6c0bb8e0b4ab85ce1ba2.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "daedalus": {
@@ -29,10 +29,10 @@
         "homepage": null,
         "owner": "input-output-hk",
         "repo": "iohk-nix",
-        "rev": "65d5b5eabf5252c7ece10efdc507f0a5c9b2aa8a",
-        "sha256": "1b2n1c3cygrczhgffq6px42hln0344l88cf0hgq78l7m5w7lysal",
+        "rev": "df1da282f996ec46b33379407df99613a1fbafdd",
+        "sha256": "0vpcyrswxkynn2q37qsrhvf62whk2ijpcwqnamxcchcq6lwfpn0l",
         "type": "tarball",
-        "url": "https://github.com/input-output-hk/iohk-nix/archive/65d5b5eabf5252c7ece10efdc507f0a5c9b2aa8a.tar.gz",
+        "url": "https://github.com/input-output-hk/iohk-nix/archive/df1da282f996ec46b33379407df99613a1fbafdd.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "niv": {