diff --git a/flake.nix b/flake.nix
index 8384a2c2..42d2580c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -28,7 +28,7 @@
             fenix.packages.${system}.fromToolchainFile
             {
               file = ./rust-toolchain.toml;
-              sha256 = "sha256-7QfkHty6hSrgNM0fspycYkRcB82eEqYa4CoAJ9qA3tU=";
+              sha256 = "sha256-opUgs6ckUQCyDxcB9Wy51pqhd0MPGHUVbwRKKPGiwZU=";
             };
         in
           pkgs.makeRustPlatform {
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index fcc85b9e..744175d5 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,2 +1,2 @@
 [toolchain]
-channel = "1.77"
+channel = "1.78"