diff --git a/modules/programs.nix b/modules/programs.nix
index 581fa79..5c85e91 100644
--- a/modules/programs.nix
+++ b/modules/programs.nix
@@ -92,7 +92,7 @@
       pdfarranger # PDF files: Split, merge, rotate, rearrange, export selected pages
       # Office suite.
       # For spellcheck, see here: https://nixos.wiki/wiki/LibreOffice#Spellcheck
-      libreoffice-fresh
+      unstable.libreoffice-fresh # TODO Switch to stable NixOS again
       zotero # Collect, organize, cite, and share your research sources
       anki-bin # Flashcards.
       transmission-gtk # BitTorrent client
diff --git a/nix/sources.json b/nix/sources.json
index fae0fa6..42d808b 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": "e0c8b90b675ac514ca8ec4d5856e18090d1ce6ac",
-        "sha256": "091zhnz8ylx8n9z4f3vhb4snj12f5ic5006c7qcfcbghrwajnd10",
+        "rev": "251d756a74e67bda25d89327b01a3da19dddabae",
+        "sha256": "0djbzaxlaiy4asbnb6974i9cp26bdsikzhfw25n9sv2fm6f632a4",
         "type": "tarball",
-        "url": "https://github.com/nix-community/NUR/archive/e0c8b90b675ac514ca8ec4d5856e18090d1ce6ac.tar.gz",
+        "url": "https://github.com/nix-community/NUR/archive/251d756a74e67bda25d89327b01a3da19dddabae.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "home-manager": {
@@ -29,10 +29,10 @@
         "homepage": null,
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "0c5b4ecbed5b155b705336aa96d878e55acd8685",
-        "sha256": "1mhbyl6r54p0nccd244f8imcvz52kxfyyxaky165w19lx100azsg",
+        "rev": "7e1ca67996afd8233d9033edd26e442836cc2ad6",
+        "sha256": "03pdf5wrpxwmr37p3xn45vm6cz1m7bzvif2v8xhqpmm09m40zb7j",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/0c5b4ecbed5b155b705336aa96d878e55acd8685.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/7e1ca67996afd8233d9033edd26e442836cc2ad6.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "rust-overlay": {
@@ -41,10 +41,10 @@
         "homepage": "",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "34971069ec33755b2adf2481851f66d8ec9a6bfa",
-        "sha256": "1ys2qhqvdkphsc5kap6agy9dfsvnjdf511gk9y9rv3vairpz2nlh",
+        "rev": "3458f7f946ba61d1a1069aedcc17d7b7616f23cd",
+        "sha256": "1crrpxl6qvc6kspr7q9x94bham6kpvh4d09ajvraajxpz2hcl2wz",
         "type": "tarball",
-        "url": "https://github.com/oxalica/rust-overlay/archive/34971069ec33755b2adf2481851f66d8ec9a6bfa.tar.gz",
+        "url": "https://github.com/oxalica/rust-overlay/archive/3458f7f946ba61d1a1069aedcc17d7b7616f23cd.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "unstable": {
@@ -53,10 +53,10 @@
         "homepage": "",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "af51545ec9a44eadf3fe3547610a5cdd882bc34e",
-        "sha256": "0z730avc6jf9ap6wvyjj4dwlv9djaznyr9an0y24cj0v9plk729x",
+        "rev": "2c15aa59df0017ca140d9ba302412298ab4bf22a",
+        "sha256": "0b39jqms70gi7hy611nlgy9vdcfkfwk505c9dxjmjyl6pbbdn5pn",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/af51545ec9a44eadf3fe3547610a5cdd882bc34e.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/2c15aa59df0017ca140d9ba302412298ab4bf22a.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }