diff --git a/examples/demo_mnist_convnet.py b/examples/demo_mnist_convnet.py
index f5f4e3f4d..d1d45a2eb 100644
--- a/examples/demo_mnist_convnet.py
+++ b/examples/demo_mnist_convnet.py
@@ -35,6 +35,8 @@
         layers.MaxPooling2D(pool_size=(2, 2)),
         layers.Conv2D(64, kernel_size=(3, 3), activation="relu"),
         layers.MaxPooling2D(pool_size=(2, 2)),
+        layers.Conv2D(128, kernel_size=(3, 3), activation="relu"),
+        layers.MaxPooling2D(pool_size=(2, 2)),
         layers.Flatten(),
         layers.Dropout(0.5),
         layers.Dense(num_classes, activation="softmax"),
@@ -44,7 +46,7 @@
 model.summary()
 
 model.compile(
-    loss="categorical_crossentropy", optimizer="adam", metrics=["accuracy"]
+    loss="categorical_crossentropy", optimizer=keras_core.optimizers.SGD(learning_rate=0.001), metrics=["accuracy"]
 )
 
 model.fit(