diff --git a/nbs/Mkdocs.ipynb b/nbs/Mkdocs.ipynb
index 7252e56..4bb8495 100644
--- a/nbs/Mkdocs.ipynb
+++ b/nbs/Mkdocs.ipynb
@@ -3853,8 +3853,6 @@
     }
    ],
    "source": [
-    "# | notest\n",
-    "\n",
     "@contextmanager\n",
     "def set_numpy_experimental_dtype_env_var():\n",
     "    if sys.version_info >= (3,9):\n",
diff --git a/settings.ini b/settings.ini
index 6d2a21a..aaa4d7e 100644
--- a/settings.ini
+++ b/settings.ini
@@ -70,7 +70,7 @@ dev_requirements = \
     pre-commit==2.21.0 \
     detect-secrets==1.4.0 \
     pandas>=1.3.5,<2.0.0 \
-    numpy>=1.21.6
+    numpy==1.21.6
     
 
 console_scripts = nbdev_mkdocs=nbdev_mkdocs._cli:_app