diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..92d36f9
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1712439257,
+        "narHash": "sha256-aSpiNepFOMk9932HOax0XwNxbA38GOUVOiXfUVPOrck=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "ff0dbd94265ac470dda06a657d5fe49de93b4599",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..093224e
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,15 @@
+{
+  description = "Rudric, the keeper of secrets";
+
+  inputs = { nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable"; };
+
+  outputs = { self, nixpkgs }:
+    let
+      system = "x86_64-linux";
+      pkgs = nixpkgs.legacyPackages.${system};
+    in {
+      devShells.${system}.default = pkgs.mkShell {
+        packages = with pkgs; [ cargo rustc rust-analyzer rustfmt sqlite ];
+      };
+    };
+}
diff --git a/src/types/session.rs b/src/types/session.rs
index 9ee95ea..a728c03 100644
--- a/src/types/session.rs
+++ b/src/types/session.rs
@@ -3,7 +3,7 @@ use std::{env, fmt::Display};
 use anyhow::{bail, Context, Result};
 use base64::{engine::general_purpose::STANDARD_NO_PAD as b64, Engine};
 use orion::aead::SecretKey;
-use sqlx::{sqlite::SqliteRow, FromRow, Row, SqlitePool};
+use sqlx::{sqlite::SqliteRow, Execute, FromRow, Row, SqlitePool};
 use time::OffsetDateTime;
 use uuid::Uuid;
 
@@ -91,13 +91,16 @@ impl SessionKey {
     }
 
     pub async fn delete_expired(db: &SqlitePool) -> Result<()> {
-        let now = OffsetDateTime::now_utc().unix_timestamp();
+        let now = OffsetDateTime::now_utc();
 
         sqlx::query!("delete from session_keys where expire_time < ?", now)
             .execute(db)
             .await
             .context("Failed to delete expired session key")?;
 
+        println!("{}",sqlx::query!("delete from session_keys where expire_time < ?", now).sql());
+
+
         Ok(())
     }
 }
@@ -141,6 +144,10 @@ impl SessionToken {
         // The session key ID is prepended to the encrypted timed key.
         let session_token = [session_key.id.as_bytes(), encrypted_timed_key.as_slice()].concat();
 
+        if let Err(e) = SessionKey::delete_expired(db).await {
+            eprintln!("Error deleting expired session tokens: {e}");
+        }
+
         Ok(Self(b64.encode(session_token)))
     }