diff --git a/docs/source/installation.rst b/docs/source/installation.rst
index 6b8f7fcd..dea3ae1d 100644
--- a/docs/source/installation.rst
+++ b/docs/source/installation.rst
@@ -7,7 +7,7 @@ Requirements
 ^^^^^^^^^^^^
 
 Requirements:
-    * Python_ >= 3.7
+    * Python_ >= 3.9
     * pytorch_ >= 1.9
     * numpy_
 Optional Dependencies:
diff --git a/hippynn/layers/pairs/dispatch.py b/hippynn/layers/pairs/dispatch.py
index 55ddc187..ea5a5f43 100644
--- a/hippynn/layers/pairs/dispatch.py
+++ b/hippynn/layers/pairs/dispatch.py
@@ -6,8 +6,6 @@
 import numpy as np
 from scipy.spatial import KDTree
 import torch
-import os
-from datetime import datetime
 
 from .open import PairMemory