diff --git a/README.md b/README.md
index 03f025e..9a3c4e8 100644
--- a/README.md
+++ b/README.md
@@ -94,7 +94,7 @@ Remove old generations from EFI:
 sudo /run/current-system/bin/switch-to-configuration boot
 ```
 
-## Add Home Manager with niv
+## Dependency management with niv
 
 niv:
 
@@ -110,6 +110,20 @@ niv:
 >
 > https://github.com/mikeroyal/NixOS-Guide
 
+Initialize:
+
+```shell
+niv init
+```
+
+Change the tracking branch of nixpkgs from unstable to 23.05:
+
+```shell
+niv modify nixpkgs --branch nixos-23.05
+```
+
+## Add Home Manager with niv
+
 Home Manager:
 
 > [Home Manager] allows declarative configuration of user specific (non-global) packages and dotfiles.
diff --git a/nix/sources.json b/nix/sources.json
index df52b1d..f00e99d 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -5,10 +5,10 @@
         "homepage": "https://nur.nix-community.org/",
         "owner": "nix-community",
         "repo": "NUR",
-        "rev": "85d19938ef33d82db0207c39f11f5947d5a5215e",
-        "sha256": "0vxjj8czwcg2vz42r5jknaxg1z6jhq1djf6zs5rq70mhsb041v3x",
+        "rev": "5341c93b5fc3dd3c920e23e09c65c924b65e0be7",
+        "sha256": "027scf623kc20pyrbsg3lrvrqch3jx6n5y865pym8nzms0kwn8pf",
         "type": "tarball",
-        "url": "https://github.com/nix-community/NUR/archive/85d19938ef33d82db0207c39f11f5947d5a5215e.tar.gz",
+        "url": "https://github.com/nix-community/NUR/archive/5341c93b5fc3dd3c920e23e09c65c924b65e0be7.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "home-manager": {
@@ -17,22 +17,22 @@
         "homepage": "https://nix-community.github.io/home-manager/",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "5bac4a1c06cd77cf8fc35a658ccb035a6c50cd2c",
-        "sha256": "1lhkqlizabh107mgj9b3fsfzz6cwpcmplkwspqqavwqr9dlmlwc4",
+        "rev": "9787dffff5d315c9593d3f9fb0f9bf2097e1b57b",
+        "sha256": "0n047422nnk5f0z6s8jkvdhq3qy7lyjc6fv3dk12gb6chsx2457h",
         "type": "tarball",
-        "url": "https://github.com/nix-community/home-manager/archive/5bac4a1c06cd77cf8fc35a658ccb035a6c50cd2c.tar.gz",
+        "url": "https://github.com/nix-community/home-manager/archive/9787dffff5d315c9593d3f9fb0f9bf2097e1b57b.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "nixpkgs": {
-        "branch": "nixos-unstable",
+        "branch": "nixos-23.05",
         "description": "Nix Packages collection",
         "homepage": null,
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "db9208ab987cdeeedf78ad9b4cf3c55f5ebd269b",
-        "sha256": "0y0npijdqbjmcm3jssinsg32y24l7p6419awwxix6r30m8swc8v3",
+        "rev": "e5f018cf150e29aac26c61dac0790ea023c46b24",
+        "sha256": "18jlakvhnbvaxgggimw1qpikdwdkz9yhwiv4hmns4sr2ab7lrg27",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/db9208ab987cdeeedf78ad9b4cf3c55f5ebd269b.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/e5f018cf150e29aac26c61dac0790ea023c46b24.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }