diff --git a/demos/predator_prey_hunter.ipynb b/demos/predator_prey_hunter.ipynb
index 9099b75..e27eb59 100644
--- a/demos/predator_prey_hunter.ipynb
+++ b/demos/predator_prey_hunter.ipynb
@@ -315,7 +315,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.5"
+   "version": "3.7.0"
   }
  },
  "nbformat": 4,
diff --git a/demos/simple_tracker.ipynb b/demos/simple_tracker.ipynb
index 1d99670..7287320 100644
--- a/demos/simple_tracker.ipynb
+++ b/demos/simple_tracker.ipynb
@@ -466,7 +466,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.5"
+   "version": "3.7.0"
   }
  },
  "nbformat": 4,