diff --git a/.github/workflows/action.yml b/.github/workflows/action.yml
index 28d2507..77f7acb 100644
--- a/.github/workflows/action.yml
+++ b/.github/workflows/action.yml
@@ -15,12 +15,12 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-20.04]
-        julia-version: ['1.7','1.8']
+        os: [ubuntu-22.04]
+        julia-version: ['1.8']
         julia-arch: [x64]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: julia-actions/setup-julia@latest
         with:
           version: ${{ matrix.julia-version }}
@@ -35,12 +35,12 @@ jobs:
     runs-on: self-hosted
     strategy:
       matrix:
-        os: [ubuntu-20.04]
-        julia-version: ['1.7','1.8']
+        os: [ubuntu-22.04]
+        julia-version: ['1.8']
         julia-arch: [x64]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: julia-actions/setup-julia@latest
         with:
           version: ${{ matrix.julia-version }}
diff --git a/README.md b/README.md
index acc6f60..3a88d02 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ pkg> add ExaTron
 
 This material is based upon work supported by the U.S. Department of Energy, Office of Science, under contract number DE-AC02-06CH11357.
 
-[build-release-img]: https://github.com/exanauts/ExaTron.jl/workflows/Run%20tests/badge.svg?branch=release
+[build-release-img]: https://github.com/exanauts/ExaTron.jl/workflows/Run%20tests/badge.svg?branch=main
 [build-url]: https://github.com/exanauts/ExaTron.jl/actions?query=workflow
 [doi-img]: https://zenodo.org/badge/DOI/10.5281/zenodo.5829757.svg
 [doi-url]: https://doi.org/10.5281/zenodo.5829757