diff --git a/notebooks/Synergistic/BrainWeb-single_slice_motion.ipynb b/notebooks/Synergistic/BrainWeb-single_slice_motion.ipynb
index a9126fe8..bbf1a09d 100644
--- a/notebooks/Synergistic/BrainWeb-single_slice_motion.ipynb
+++ b/notebooks/Synergistic/BrainWeb-single_slice_motion.ipynb
@@ -60,8 +60,7 @@
     "# Make sure everything is installed that we need\n",
     "import os\n",
     "sirf_python_executable = os.environ.get('SIRF_PYTHON_EXECUTABLE')\n",
-    "!{sirf_python_executable} -m pip install brainweb nibabel numba --user\n",
-    "# !pip install brainweb nibabel numba --user"
+    "!{sirf_python_executable} -m pip install brainweb nibabel --user\n"
    ]
   },
   {
diff --git a/notebooks/Synergistic/BrainWeb.ipynb b/notebooks/Synergistic/BrainWeb.ipynb
index 11703511..5d8a82d2 100644
--- a/notebooks/Synergistic/BrainWeb.ipynb
+++ b/notebooks/Synergistic/BrainWeb.ipynb
@@ -58,7 +58,7 @@
    "outputs": [],
    "source": [
     "# Make sure everything is installed that we need\n",
-    "!pip install brainweb nibabel numba --user"
+    "!pip install brainweb nibabel --user"
    ]
   },
   {
diff --git a/notebooks/Synergistic/Solutions/Dual_PET_Answer-noMotion.ipynb b/notebooks/Synergistic/Solutions/Dual_PET_Answer-noMotion.ipynb
index 74f4f68a..2ff0a2b3 100644
--- a/notebooks/Synergistic/Solutions/Dual_PET_Answer-noMotion.ipynb
+++ b/notebooks/Synergistic/Solutions/Dual_PET_Answer-noMotion.ipynb
@@ -93,7 +93,6 @@
     "import sys\n",
     "import shutil\n",
     "from tqdm.auto import tqdm, trange\n",
-    "from numba import jit\n",
     "import time\n",
     "import sirf.STIR as pet\n",
     "from sirf.Utilities import examples_data_path\n",
diff --git a/notebooks/Synergistic/Solutions/Dual_PET_Answer-wMotion.ipynb b/notebooks/Synergistic/Solutions/Dual_PET_Answer-wMotion.ipynb
index 350e08f9..771aac3a 100644
--- a/notebooks/Synergistic/Solutions/Dual_PET_Answer-wMotion.ipynb
+++ b/notebooks/Synergistic/Solutions/Dual_PET_Answer-wMotion.ipynb
@@ -92,7 +92,6 @@
     "import os\n",
     "import sys\n",
     "import shutil\n",
-    "from numba import jit\n",
     "import time\n",
     "import sirf.STIR as pet\n",
     "from sirf.Utilities import examples_data_path\n",
diff --git a/notebooks/Synergistic/de_Pierro_MAPEM.ipynb b/notebooks/Synergistic/de_Pierro_MAPEM.ipynb
index 25b64e37..61b21a0e 100644
--- a/notebooks/Synergistic/de_Pierro_MAPEM.ipynb
+++ b/notebooks/Synergistic/de_Pierro_MAPEM.ipynb
@@ -47,6 +47,17 @@
     "# All the normal imports and handy functions"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# If you have python3, you can uncomment this\n",
+    "# and all subsequent mentions of \"@jit\".\n",
+    "# from numba import jit"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,
@@ -60,7 +71,6 @@
     "import sys\n",
     "import shutil\n",
     "from tqdm.auto import tqdm, trange\n",
-    "from numba import jit\n",
     "import time\n",
     "from scipy.ndimage.filters import gaussian_filter\n",
     "import sirf.STIR as pet\n",
@@ -180,7 +190,7 @@
     "\n",
     "# Define function for xreg. \n",
     "# Using jit gets computation time from 90 secs to 2!\n",
-    "@jit\n",
+    "#@jit\n",
     "def compute_xreg(image_array):\n",
     "    sizes=image_array.shape\n",
     "    image_reg= image_array*0 # make a copy first. Will then change values\n",
@@ -193,7 +203,7 @@
     "    return image_reg\n",
     "\n",
     "# define a function that computes the MAP-EM update\n",
-    "@jit\n",
+    "#@jit\n",
     "def compute_MAPEM_update(xEM,xreg, beta):\n",
     "    return (2*xEM)/(numpy.sqrt((1 - beta*xreg)**2 + 4*beta*xEM) + (1 - beta*xreg) + 0.00001)"
    ]