diff --git a/19_training_and_deploying_at_scale.ipynb b/19_training_and_deploying_at_scale.ipynb
index 54c8579..430821e 100644
--- a/19_training_and_deploying_at_scale.ipynb
+++ b/19_training_and_deploying_at_scale.ipynb
@@ -1329,7 +1329,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "converter.optimizations = [tf.lite.Optimize.OPTIMIZE_FOR_SIZE]"
+    "converter.optimizations = [tf.lite.Optimize.DEFAULT]"
    ]
   },
   {
@@ -1337,13 +1337,6 @@
    "execution_count": 49,
    "metadata": {},
    "outputs": [
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      "WARNING:absl:Optimization option OPTIMIZE_FOR_SIZE is deprecated, please use optimizations=[Optimize.DEFAULT] instead.\n"
-     ]
-    },
     {
      "name": "stdout",
      "output_type": "stream",
@@ -1356,8 +1349,6 @@
      "output_type": "stream",
      "text": [
       "INFO:tensorflow:Assets written to: /var/folders/wy/h39t6kb11pnbb0pzhksd_fqh0000gq/T/tmp6ffbc1qs/assets\n",
-      "WARNING:absl:Optimization option OPTIMIZE_FOR_SIZE is deprecated, please use optimizations=[Optimize.DEFAULT] instead.\n",
-      "WARNING:absl:Optimization option OPTIMIZE_FOR_SIZE is deprecated, please use optimizations=[Optimize.DEFAULT] instead.\n",
       "WARNING:absl:Buffer deduplication procedure will be skipped when flatbuffer library is not properly loaded\n",
       "2022-04-10 09:26:30.319286: W tensorflow/compiler/mlir/lite/python/tf_tfl_flatbuffer_helpers.cc:357] Ignored output_format.\n",
       "2022-04-10 09:26:30.319301: W tensorflow/compiler/mlir/lite/python/tf_tfl_flatbuffer_helpers.cc:360] Ignored drop_control_dependency.\n",