diff --git a/.github/workflows/check-standard.yaml b/.github/workflows/check-standard.yaml
index 1a35336..cb0f10d 100644
--- a/.github/workflows/check-standard.yaml
+++ b/.github/workflows/check-standard.yaml
@@ -1,5 +1,5 @@
-# Workflow derived from https://github.com/r-lib/actions/tree/master/examples
-# Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
+# Workflow derived from https://github.com/r-lib/actions/blob/v2-branch/examples/check-standard.yaml
+
 on:
   push:
     branches: [main, master]
@@ -30,23 +30,28 @@ jobs:
       R_KEEP_PKG_SOURCE: yes
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - uses: r-lib/actions/setup-pandoc@v2
 
-      # JAGS install from https://github.com/boydorr/SpARKjags/blob/master/.github/workflows/test-build.yaml
+      # JAGS install. Inspired by https://github.com/boydorr/SpARKjags/blob/master/.github/workflows/test-build.yaml
+      # but updated with ignoring certificates and redirects.
       # JAGS is automatically installed on linux via the rjags package.
       - name: Install JAGS (if Windows)
         if: runner.os == 'Windows'
         run: |
-          curl.exe -o wjags.exe --url https://deac-fra.dl.sourceforge.net/project/mcmc-jags/JAGS/4.x/Windows/JAGS-4.3.1.exe
+          curl.exe -o wjags.exe -L0 -k --url https://downloads.sourceforge.net/project/mcmc-jags/JAGS/4.x/Windows/JAGS-4.3.1.exe
           wjags.exe /S
           del wjags.exe
         shell: cmd
 
       - name: Install JAGS (if macOS)
         if: runner.os == 'macOS'
-        run: brew install jags
+        # This worked before R 4.3: brew install jags
+        run: |
+          curl -o wjags.pkg -L0 -k --url https://downloads.sourceforge.net/project/mcmc-jags/JAGS/4.x/Mac%20OS%20X/JAGS-4.3.2.pkg
+          sudo installer -pkg wjags.pkg -target /
+          rm wjags.pkg
 
       # R
       - uses: r-lib/actions/setup-r@v2
diff --git a/README.md b/README.md
index 24a55c8..4d3c0ed 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # mcp: Regression with Multiple Change Points<img src="https://github.com/lindeloev/mcp/raw/docs/man/figures/logo_200px.png" align="right" style="padding: 20px; padding-right: 0px;" />
 
 [![mcp Github Actions status](https://github.com/lindeloev/mcp/actions/workflows/check-standard.yaml/badge.svg)](https://github.com/lindeloev/mcp/actions/workflows/check-standard.yaml)
-[![mcp Coveralls status](https://codecov.io/gh/lindeloev/mcp/branch/master/graph/badge.svg)](https://coveralls.io/github/lindeloev/mcp/)
+[![mcp Coveralls status](https://codecov.io/gh/lindeloev/mcp/branch/main/graph/badge.svg)](https://coveralls.io/github/lindeloev/mcp/)
 [![mcp CRAN status](https://www.r-pkg.org/badges/version/mcp)](https://CRAN.R-project.org/package=mcp)
 [![mcp CRAN downloads](https://cranlogs.r-pkg.org/badges/mcp)](https://cranlogs.r-pkg.org/badges/mcp)