diff --git a/plot_all_note_durations.ipynb b/plot_all_note_durations.ipynb
index 57458c9..8502333 100644
--- a/plot_all_note_durations.ipynb
+++ b/plot_all_note_durations.ipynb
@@ -71,7 +71,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.5"
+   "version": "3.8.6"
   }
  },
  "nbformat": 4,
diff --git a/plot_calibrate.ipynb b/plot_calibrate.ipynb
index 11f6c32..cd30518 100644
--- a/plot_calibrate.ipynb
+++ b/plot_calibrate.ipynb
@@ -67,7 +67,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.5"
+   "version": "3.8.6"
   }
  },
  "nbformat": 4,
diff --git a/plot_us_db_range.ipynb b/plot_us_db_range.ipynb
index 25099a7..8495363 100644
--- a/plot_us_db_range.ipynb
+++ b/plot_us_db_range.ipynb
@@ -75,7 +75,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.5"
+   "version": "3.8.6"
   }
  },
  "nbformat": 4,