diff --git a/README.md b/README.md
index 54268b6..fac4214 100644
--- a/README.md
+++ b/README.md
@@ -127,3 +127,4 @@ For any inquiries or feedback, please contact:
 ---
 
 Thank you for your interest in Pi Open Hub! We hope you find it useful and exciting.
+# Updated on Wed May 21 10:41:53 UTC 2025
diff --git a/package.json b/package.json
index 3d3209a..1a5a007 100644
--- a/package.json
+++ b/package.json
@@ -70,7 +70,8 @@
     "lint-staged": "^15.2.0"
   },
   "engines": {
-    "node": ">=18.0.0"
+    "node": ">=18.0.0",
+    "npm": ">=9.0.0"
   },
   "repository": {
     "type": "git",
diff --git a/requirements.txt b/requirements.txt
index f0461b8..381fafb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,6 +6,7 @@ Flask-SQLAlchemy==3.1.1
 Flask-JWT-Extended==4.5.3
 marshmallow==3.20.1
 Flask-Logging==0.2.0
+Flask-Caching==2.1.0
 
 # Testing libraries
 pytest==7.4.3
diff --git a/src/quantum_optimizer.py b/src/quantum_optimizer.py
index 8fb18d9..74005fa 100644
--- a/src/quantum_optimizer.py
+++ b/src/quantum_optimizer.py
@@ -2,11 +2,11 @@
 
 from qiskit import QuantumCircuit, Aer, transpile
 from qiskit.circuit import Parameter
-from qiskit.algorithms.minimum_eigensolvers import NumPyMinimumEigensolver
-from qiskit.primitives import Sampler, BackendSampler
-from qiskit.circuit.library import RealAmplitudes, EfficientSU2
-from qiskit.quantum_info import SparsePauliOp
-from qiskit_algorithms.optimizers import COBYLA, SPSA, ADAM
+from qiskit.algorithms.minimum_eigensolvers import NumPyMinimumEigensolver, QAOA
+from qiskit.primitives import Sampler, BackendSampler, Estimator
+from qiskit.circuit.library import RealAmplitudes, EfficientSU2, TwoLocal
+from qiskit.quantum_info import SparsePauliOp, Statevector
+from qiskit_algorithms.optimizers import COBYLA, SPSA, ADAM, L_BFGS_B
 import numpy as np
 
 class QuantumOptimizer: