diff --git a/source/conf.py b/source/conf.py
index 4d01e73..2fc6dfb 100644
--- a/source/conf.py
+++ b/source/conf.py
@@ -169,4 +169,4 @@ def setup(app):
     app.add_javascript('copybutton.js')
 
 nbsphinx_allow_errors = True
-nbsphinx_timeout = 360
+nbsphinx_timeout = 720
diff --git a/source/dft_nuc_hess.ipynb b/source/dft_nuc_hess.ipynb
index e4faa59..48d4135 100644
--- a/source/dft_nuc_hess.ipynb
+++ b/source/dft_nuc_hess.ipynb
@@ -1748,7 +1748,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.6"
+   "version": "3.7.0"
   }
  },
  "nbformat": 4,