diff --git a/src/controller/auth.ts b/src/controller/auth.ts
index be3d492..66a3b14 100644
--- a/src/controller/auth.ts
+++ b/src/controller/auth.ts
@@ -49,5 +49,5 @@ export const logout = async (token: string) => {
 
     if (session === null) return { code: 2002, message: "Your session token is invalid" };
 
-    await session.delete();
+    await session.deleteOne();
 };
\ No newline at end of file
diff --git a/src/controller/key.ts b/src/controller/key.ts
index 4e28d5c..6e4d5cb 100644
--- a/src/controller/key.ts
+++ b/src/controller/key.ts
@@ -31,5 +31,5 @@ export const deleteKey = async (userId: string, projectId: string, keyId: string
     const key = await AccessKey.findOne({ _id: keyId, projectId: encryptClearField(projectId) });
     if (key === null) return { code: 8002, message: "The provided key could not be found" };
 
-    key.delete();
+    key.deleteOne();
 };
\ No newline at end of file
diff --git a/src/controller/member.ts b/src/controller/member.ts
index 8ccb041..e9f041a 100644
--- a/src/controller/member.ts
+++ b/src/controller/member.ts
@@ -75,5 +75,5 @@ export const deleteMember = async (userId: string, projectId: string, configurat
     });
     if (member === null) return { code: 1002, message: "The provided member is not part of this project" };
 
-    await member.delete();
+    await member.deleteOne();
 };
diff --git a/src/controller/projects.ts b/src/controller/projects.ts
index 00101a8..5299b13 100644
--- a/src/controller/projects.ts
+++ b/src/controller/projects.ts
@@ -62,7 +62,7 @@ export const deleteProject = async (id: string, userId: string) => {
 
     // TODO: Delete all licenses, groups, permissions, ..
 
-    await project?.delete();
+    await project?.deleteOne();
 };
 
 export const patchProject = async (id: string, userId: string, config: {