diff --git a/nix/hermes.nix b/nix/hermes.nix
index bbb2ec7b1..7ce1bc900 100644
--- a/nix/hermes.nix
+++ b/nix/hermes.nix
@@ -9,7 +9,7 @@
 rustPlatform.buildRustPackage rec {
   name = "hermes";
   inherit src;
-  cargoSha256 = "sha256-DBHDJlD2kTUeU0LCG5ZUij+v+lWUYRPGVvUKUYPfYQA=";
+  cargoSha256 = "sha256-Pkdc1XrhMFjuUcMsMfvltOynCIJtfeWmwEBTPz8Exok=";
   cargoBuildFlags = "-p ibc-relayer-cli";
   buildInputs = lib.optionals stdenv.isDarwin [
     darwin.apple_sdk.frameworks.Security
diff --git a/nix/sources.json b/nix/sources.json
index cea7aad03..20aba3331 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -24,27 +24,27 @@
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "ibc-rs": {
-        "branch": "v1.1.0",
+        "branch": "v1.4.0",
         "description": "IBC modules and relayer - Formal specifications and Rust implementation",
         "homepage": "",
         "owner": "informalsystems",
         "repo": "ibc-rs",
-        "rev": "0daa3e16431e748c96a3fa4ad5e9698074e09060",
-        "sha256": "1fp4hz390fd4nlkrkzdmypy9i83i57l21hg7l0d9xi8h1hjginam",
+        "rev": "daad02843a091bbdb3dd608e5f4ce790895c8845",
+        "sha256": "1n90sl5mcw4q6xri9k6rlhavxl43nxaza4ma9qwbhz2sh63sbh1l",
         "type": "tarball",
-        "url": "https://github.com/informalsystems/ibc-rs/archive/0daa3e16431e748c96a3fa4ad5e9698074e09060.tar.gz",
+        "url": "https://github.com/informalsystems/ibc-rs/archive/daad02843a091bbdb3dd608e5f4ce790895c8845.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "nixpkgs": {
-        "branch": "release-22.11",
+        "branch": "master",
         "description": "Nix Packages collection",
         "homepage": "",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "15b75800dce80225b44f067c9012b09de37dfad2",
-        "sha256": "0xmza136qf0hssh2a4dq62w7w1xs6rdfxs314pqxqjvvqibf1qb2",
+        "rev": "90aa73fc8e1550b16d1ebdc436e48d9951f7989b",
+        "sha256": "0jh4npbcqjlszhnaz5mkziv5g1p5ig6wqp68yjxkjllsc7vhsrw6",
         "type": "tarball",
-        "url": "https://github.com/NixOS/nixpkgs/archive/15b75800dce80225b44f067c9012b09de37dfad2.tar.gz",
+        "url": "https://github.com/NixOS/nixpkgs/archive/90aa73fc8e1550b16d1ebdc436e48d9951f7989b.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }