diff --git a/flake.nix b/flake.nix
index f359c5e6e087c26b28ad1073763eda4334fe9455..d030b31941c5c1b2079d5d6298e22daaad1bed2d 100644
--- a/flake.nix
+++ b/flake.nix
@@ -27,11 +27,18 @@
 
         devShell = pkgs.mkShell {
           buildInputs = with pkgs; [openssl];
-          nativeBuildInputs = with pkgs; [rustc cargo rustfmt rust-analyzer pkg-config clippy];
+          nativeBuildInputs = with pkgs; [
+            rustc
+            cargo
+            rustfmt
+            rust-analyzer
+            pkg-config
+            clippy
+            cargo-tarpaulin
+          ];
         };
 
         formatter = nixpkgs.legacyPackages.${system}.alejandra;
       }
     );
 }
-