diff --git a/CHANGELOG.md b/CHANGELOG.md
index 580de4350..2a79273fd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## Unreleased
 
+- Python 3.6.15 and 3.7.12 are now available (CPython) ([#1238](https://github.com/heroku/heroku-buildpack-python/pull/1238)).
 
 ## v198 (2021-08-30)
 
diff --git a/README.md b/README.md
index 354d882fe..1a04500e7 100644
--- a/README.md
+++ b/README.md
@@ -62,5 +62,5 @@ Supported runtime options include:
 
 - `python-3.9.7`
 - `python-3.8.12`
-- `python-3.7.11`
-- `python-3.6.14`
+- `python-3.7.12`
+- `python-3.6.15`
diff --git a/bin/default_pythons b/bin/default_pythons
index b5e3bbab8..4f58cb73f 100755
--- a/bin/default_pythons
+++ b/bin/default_pythons
@@ -7,8 +7,8 @@
 
 LATEST_39="python-3.9.7"
 LATEST_38="python-3.8.12"
-LATEST_37="python-3.7.11"
-LATEST_36="python-3.6.14"
+LATEST_37="python-3.7.12"
+LATEST_36="python-3.6.15"
 LATEST_35="python-3.5.10"
 LATEST_34="python-3.4.10"
 LATEST_27="python-2.7.18"
diff --git a/builds/runtimes/python-3.6.15 b/builds/runtimes/python-3.6.15
new file mode 100755
index 000000000..ad417233a
--- /dev/null
+++ b/builds/runtimes/python-3.6.15
@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+# Build Path: /app/.heroku/python/
+
+source $(dirname $0)/python3
diff --git a/builds/runtimes/python-3.7.12 b/builds/runtimes/python-3.7.12
new file mode 100755
index 000000000..ad417233a
--- /dev/null
+++ b/builds/runtimes/python-3.7.12
@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+# Build Path: /app/.heroku/python/
+
+source $(dirname $0)/python3
diff --git a/spec/fixtures/python_3.6/runtime.txt b/spec/fixtures/python_3.6/runtime.txt
index 03b22563a..6aaad49f7 100644
--- a/spec/fixtures/python_3.6/runtime.txt
+++ b/spec/fixtures/python_3.6/runtime.txt
@@ -1 +1 @@
-python-3.6.14
+python-3.6.15
diff --git a/spec/fixtures/python_3.7/runtime.txt b/spec/fixtures/python_3.7/runtime.txt
index 13806010f..d9c98d799 100644
--- a/spec/fixtures/python_3.7/runtime.txt
+++ b/spec/fixtures/python_3.7/runtime.txt
@@ -1 +1 @@
-python-3.7.11
+python-3.7.12
diff --git a/spec/hatchet/python_version_spec.rb b/spec/hatchet/python_version_spec.rb
index 737a533cb..4589e2d91 100644
--- a/spec/hatchet/python_version_spec.rb
+++ b/spec/hatchet/python_version_spec.rb
@@ -156,13 +156,13 @@
     end
   end
 
-  context 'when runtime.txt contains python-3.6.14' do
+  context 'when runtime.txt contains python-3.6.15' do
     let(:app) { Hatchet::Runner.new('spec/fixtures/python_3.6') }
 
     include_examples 'builds with the requested Python version', LATEST_PYTHON_3_6
   end
 
-  context 'when runtime.txt contains python-3.7.11' do
+  context 'when runtime.txt contains python-3.7.12' do
     let(:app) { Hatchet::Runner.new('spec/fixtures/python_3.7') }
 
     include_examples 'builds with the requested Python version', LATEST_PYTHON_3_7
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index f007f3215..1e1855376 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -9,8 +9,8 @@
 LATEST_PYTHON_2_7 = '2.7.18'
 LATEST_PYTHON_3_4 = '3.4.10'
 LATEST_PYTHON_3_5 = '3.5.10'
-LATEST_PYTHON_3_6 = '3.6.14'
-LATEST_PYTHON_3_7 = '3.7.11'
+LATEST_PYTHON_3_6 = '3.6.15'
+LATEST_PYTHON_3_7 = '3.7.12'
 LATEST_PYTHON_3_8 = '3.8.12'
 LATEST_PYTHON_3_9 = '3.9.7'
 LATEST_PYPY_2_7 = '7.3.2'