diff --git a/src/primaite/notebooks/Action-masking.ipynb b/src/primaite/notebooks/Action-masking.ipynb
index 0e067b26..8811bb15 100644
--- a/src/primaite/notebooks/Action-masking.ipynb
+++ b/src/primaite/notebooks/Action-masking.ipynb
@@ -6,6 +6,8 @@
    "source": [
     "# Action Masking\n",
     "\n",
+    "© Crown-owned copyright 2024, Defence Science and Technology Laboratory UK\n",
+    "\n",
     "PrimAITE environments support action masking. The action mask shows which of the agent's actions are applicable with the current environment state. For example, a node can only be turned on if it is currently turned off."
    ]
   },
@@ -210,7 +212,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.12"
+   "version": "3.10.8"
   }
  },
  "nbformat": 4,