diff --git a/demo/spinwalk_example.ipynb b/demo/spinwalk_example.ipynb
index 1852596..3697902 100644
--- a/demo/spinwalk_example.ipynb
+++ b/demo/spinwalk_example.ipynb
@@ -41,7 +41,7 @@
     },
     {
       "cell_type": "code",
-      "execution_count": 3,
+      "execution_count": null,
       "metadata": {
         "colab": {
           "base_uri": "https://localhost:8080/"
@@ -121,7 +121,7 @@
         "\n",
         "# clone SpinWalk\n",
         "rm -rf SpinWalk\n",
-        "git clone --depth 1 -b dev https://github.com/aghaeifar/SpinWalk.git &> /dev/null\n",
+        "git clone --depth 1 https://github.com/aghaeifar/SpinWalk.git &> /dev/null\n",
         "\n",
         "# build it\n",
         "cd SpinWalk\n",
@@ -132,7 +132,7 @@
     },
     {
       "cell_type": "code",
-      "execution_count": 4,
+      "execution_count": null,
       "metadata": {
         "id": "Fvn4Asv3Fw8g",
         "outputId": "ef844c44-f0c2-4665-aea0-02ca8993e96e",
@@ -199,7 +199,7 @@
     },
     {
       "cell_type": "code",
-      "execution_count": 5,
+      "execution_count": null,
       "metadata": {
         "id": "ya6sYfOkFw8g",
         "outputId": "b15487f3-ec62-449e-b16f-cb9803ac3822",
@@ -240,7 +240,7 @@
     },
     {
       "cell_type": "code",
-      "execution_count": 6,
+      "execution_count": null,
       "metadata": {
         "colab": {
           "base_uri": "https://localhost:8080/"
@@ -321,7 +321,7 @@
     },
     {
       "cell_type": "code",
-      "execution_count": 7,
+      "execution_count": null,
       "metadata": {
         "id": "-r29zDMGFw8h",
         "outputId": "52b4f048-557e-45dc-f6c3-44f2b7d0ad91",
@@ -391,7 +391,7 @@
     },
     {
       "cell_type": "code",
-      "execution_count": 8,
+      "execution_count": null,
       "metadata": {
         "id": "GijlHXvgUD9V",
         "outputId": "3424fdc6-1358-4543-e948-3d4fdcbe22f5",
@@ -434,7 +434,7 @@
     },
     {
       "cell_type": "code",
-      "execution_count": 9,
+      "execution_count": null,
       "metadata": {
         "id": "SIp2KTeaFw8i",
         "outputId": "28d63735-a344-463b-dd6b-03b7a0633d4e",
@@ -521,7 +521,7 @@
     },
     {
       "cell_type": "code",
-      "execution_count": 10,
+      "execution_count": null,
       "metadata": {
         "colab": {
           "base_uri": "https://localhost:8080/"
@@ -628,7 +628,7 @@
     },
     {
       "cell_type": "code",
-      "execution_count": 11,
+      "execution_count": null,
       "metadata": {
         "colab": {
           "base_uri": "https://localhost:8080/"
@@ -669,7 +669,7 @@
     },
     {
       "cell_type": "code",
-      "execution_count": 12,
+      "execution_count": null,
       "metadata": {
         "id": "KLe5Bgo4Rg2n",
         "outputId": "ac1f0479-140f-4e20-bf56-f87bf79912e5",
@@ -697,7 +697,7 @@
     },
     {
       "cell_type": "code",
-      "execution_count": 13,
+      "execution_count": null,
       "metadata": {
         "id": "MecOOSwyOWS2"
       },
@@ -745,7 +745,7 @@
     },
     {
       "cell_type": "code",
-      "execution_count": 14,
+      "execution_count": null,
       "metadata": {
         "id": "h424CsngbtwS",
         "outputId": "ece1f93c-ba66-4a98-8fb7-58871f324605",