diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index f3f1a626a..b1a529883 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -18,7 +18,7 @@ env:
 jobs:
   mac-os-build:
     name: Build Mac OS binaries
-    runs-on: macos-10.15
+    runs-on: macos-11
     steps:
       - name: Git Checkout
         uses: actions/checkout@v2
@@ -79,7 +79,7 @@ jobs:
 
   linux-build:
     name: Build and Publish Linux Binaries and Docker Image
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     needs: [ mac-os-build, windows-build ]
     outputs:
       ziti-version: ${{ steps.get_version.outputs.ziti-version }}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 50e1763c2..f42efa013 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,23 @@
+# Release 0.26.5
+
+## What's New
+
+This build has no functional changes, but does have changes to the build workflow,
+because github is deprecating certain action runners. See
+https://github.blog/changelog/2022-08-09-github-actions-the-ubuntu-18-04-actions-runner-image-is-being-deprecated-and-will-be-removed-by-12-1-22/
+and
+https://github.blog/changelog/2022-07-20-github-actions-the-macos-10-15-actions-runner-image-is-being-deprecated-and-will-be-removed-by-8-30-22/
+for details 
+
+* MacOS builds are now done on the macos-11 github builder
+* Linux builds are now done on the ubuntu-20.04 builder
+
+This changes the oldest supported operating system versions for ziti-controller and ziti-router to those 
+listed above, due to dependencies on system shared libraries that may not be available on older operating 
+system versions.
+
+If this change negatively impacts you, please let us on [Discourse](https://openziti.discourse.group).
+
 # Release 0.26.4
 
 ## What's New