diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6407f99b1..a0a02e9d0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## [Unreleased]
 
+- Fixed the "Python security update is available" warning being shown when the requested version is newer than the latest version known to the buildpack. ([#1569](https://github.com/heroku/heroku-buildpack-python/pull/1569))
 - Fixed glibc warnings seen when downgrading the stack version. ([#1568](https://github.com/heroku/heroku-buildpack-python/pull/1568))
 - Adjusted compiler options used to build Python for improved parity with the Docker Hub Python images. ([#1566](https://github.com/heroku/heroku-buildpack-python/pull/1566))
 - Excluded `LD_LIBRARY_PATH` and `PYTHONHOME` app config vars when invoking subprocesses during the build. ([#1565](https://github.com/heroku/heroku-buildpack-python/pull/1565))
diff --git a/bin/steps/python b/bin/steps/python
index c7e42f58d..8388602ee 100755
--- a/bin/steps/python
+++ b/bin/steps/python
@@ -32,9 +32,12 @@ function eol_python_version_error() {
 }
 
 function warn_if_patch_update_available() {
-  local current_version="${1}"
+  local requested_version="${1}"
   local latest_patch_version="${2}"
-  if [[ "${current_version}" != "${latest_patch_version}" ]]; then
+  # Extract the patch version component of the version strings (ie: the '5' in '3.10.5').
+  local requested_patch_number="${requested_version##*.}"
+  local latest_patch_number="${latest_patch_version##*.}"
+  if (( requested_patch_number < latest_patch_number )); then
     puts-warn
     puts-warn "A Python security update is available! Upgrade as soon as possible to: ${latest_patch_version}"
     puts-warn "See: https://devcenter.heroku.com/articles/python-runtimes"