diff --git a/db.kdbx b/db.kdbx
new file mode 100644
index 0000000..a68839d
--- /dev/null
+++ b/db.kdbx
@@ -0,0 +1,25 @@
+{
+  "header": {
+    "version": {
+      "major": 0,
+      "minor": 0
+    }
+  },
+  "groups": [
+    {
+      "name": "Racine",
+      "path": ""
+    }
+  ],
+  "entries": [
+    {
+      "title": "Entry",
+      "username": "",
+      "password": "",
+      "url": "",
+      "notes": "",
+      "groupPath": ""
+    }
+  ],
+  "keyFiles": []
+}
\ No newline at end of file
diff --git a/src/kdbx/store.ts b/src/kdbx/store.ts
index bf47835..96622d3 100644
--- a/src/kdbx/store.ts
+++ b/src/kdbx/store.ts
@@ -7,6 +7,7 @@ export function createEmptySnapshot(): KdbxDatabaseSnapshot {
 		},
 		groups: [{ name: "Racine", path: "" }],
 		entries: [],
+		keyFiles: [],
 	};
 }
 
@@ -15,6 +16,7 @@ export function cloneSnapshot(snapshot: KdbxDatabaseSnapshot): KdbxDatabaseSnaps
 		header: { ...snapshot.header, version: { ...snapshot.header.version } },
 		groups: snapshot.groups.map(cloneGroup),
 		entries: snapshot.entries.map(cloneEntry),
+		keyFiles: snapshot.keyFiles ? [...snapshot.keyFiles] : [],
 	};
 }
 
diff --git a/src/kdbx/types.ts b/src/kdbx/types.ts
index 2ce8db6..b608726 100644
--- a/src/kdbx/types.ts
+++ b/src/kdbx/types.ts
@@ -12,6 +12,8 @@ export type KdbxHeader = {
 	streamStartBytes?: Uint8Array;
 	innerRandomStreamId?: number;
 	kdfParameters?: Record<string, string | number | boolean>;
+	cipherUuid?: Uint8Array;
+	publicCustomData?: Record<string, string>;
 };
 
 export type KdbxEntry = {
@@ -33,4 +35,5 @@ export type KdbxDatabaseSnapshot = {
 	header: KdbxHeader;
 	groups: KdbxGroup[];
 	entries: KdbxEntry[];
+	keyFiles?: string[];
 };
diff --git a/src/keepass.ts b/src/keepass.ts
index cde46f6..492a47c 100644
--- a/src/keepass.ts
+++ b/src/keepass.ts
@@ -1,4 +1,4 @@
-import { readFile } from "node:fs/promises";
+import { readFile, writeFile } from "node:fs/promises";
 import type {
 	KeePassEntry,
 	KeePassEntryInput,
@@ -20,16 +20,15 @@ export class KeePassDatabase {
 	constructor(
 		private path: string,
 		private options: KeePassOpenOptions,
-	) {
-		void path;
-		void options;
-	}
+	) {}
 
 	async listEntries(): Promise<KeePassEntry[]> {
+		await this.ensureLoaded();
 		return cloneSnapshot(this.snapshot).entries;
 	}
 
 	async findEntries(query: KeePassFindQuery): Promise<KeePassEntry[]> {
+		await this.ensureLoaded();
 		return this.snapshot.entries.filter((entry) => {
 			if (query.title && !entry.title.toLowerCase().includes(query.title.toLowerCase())) return false;
 			if (query.username && !entry.username.toLowerCase().includes(query.username.toLowerCase())) return false;
@@ -40,10 +39,12 @@ export class KeePassDatabase {
 	}
 
 	async listGroups(): Promise<KeePassGroup[]> {
+		await this.ensureLoaded();
 		return cloneSnapshot(this.snapshot).groups;
 	}
 
 	async createEntry(entry: KeePassEntryInput): Promise<KeePassEntry> {
+		await this.ensureLoaded();
 		const created: KeePassEntry = {
 			title: entry.title,
 			username: entry.username ?? EMPTY,
@@ -59,6 +60,7 @@ export class KeePassDatabase {
 	}
 
 	async createGroup(group: KeePassGroupInput): Promise<KeePassGroup> {
+		await this.ensureLoaded();
 		const path = group.path ? `${group.path}/${group.name}` : group.name;
 		const created = { name: group.name, path };
 		this.snapshot.groups.push(created);
@@ -67,6 +69,8 @@ export class KeePassDatabase {
 	}
 
 	async save(): Promise<void> {
+		await this.ensureLoaded();
+		await writeFile(this.path, JSON.stringify(this.snapshot, null, 2), "utf8");
 		this.dirty = false;
 	}
 
@@ -76,7 +80,21 @@ export class KeePassDatabase {
 
 	private async ensureLoaded(): Promise<void> {
 		if (this.header) return;
-		this.header = createEmptySnapshot().header;
+
+		try {
+			const buffer = new Uint8Array(await readFile(this.path));
+			const parsed = parseKdbxFile(buffer);
+			this.header = parsed.header;
+			this.snapshot = {
+				header: parsed.header,
+				groups: [{ name: "Racine", path: "" }],
+				entries: [],
+			};
+			return;
+		} catch {
+			this.snapshot = createEmptySnapshot();
+			this.header = this.snapshot.header;
+		}
 	}
 }