diff --git a/python/setup.py b/python/setup.py
index 6fffe59..e853565 100644
--- a/python/setup.py
+++ b/python/setup.py
@@ -15,7 +15,7 @@
     install_requires=[
         "flake8~=3.8",
         "matplotlib~=3.3",
-        "numpy~=1.18",
+        "numpy~=1.22",
         "pylint~=2.5",
         "pytest~=6.0",
         "pytest-xdist~=1.34",
diff --git a/requirements.txt b/requirements.txt
index 474b475..cc283f9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -23,7 +23,9 @@ importlib-metadata==4.13.0
 matplotlib==3.3.1
 
 # Pin numpy to 1.18.5 due to tensorflow v2.1.1 hard pinning it to that version.
-numpy==1.18.5
+# Pin to 1.22 at least as security issues with 1.18.5; I don't think we use
+# tensorflow here
+numpy==1.22
 pylint==2.5.3
 pytest==6.0.0
 pytest-xdist==1.34.0