diff --git a/.github/workflows/r_command_check.yaml b/.github/workflows/r_command_check.yaml
index 10c23f9..34cf241 100644
--- a/.github/workflows/r_command_check.yaml
+++ b/.github/workflows/r_command_check.yaml
@@ -1,8 +1,13 @@
+# R package checking
+# Workflow derived from https://github.com/r-lib/actions/tree/v2/examples
+
 on:
   push:
-    branches: [main]
+    branches: 
+      - main
   pull_request:
-    branches: [main]
+    branches:
+      - main
 
 name: R-CMD-check
 
@@ -17,17 +22,18 @@ jobs:
       matrix:
         config:
           - {os: macOS-latest,   r: 'release'}
-          - {os: windows-latest, r: 'release'}
-          - {os: ubuntu-latest,   r: 'devel', http-user-agent: 'release'}
-          - {os: ubuntu-latest,   r: 'release'}
-          - {os: ubuntu-latest,   r: 'oldrel-1'}
+          #- {os: windows-latest, r: 'release'}
+          #- {os: ubuntu-latest,  r: 'devel', http-user-agent: 'release'}
+          #- {os: ubuntu-latest,  r: 'release'}
+          #- {os: ubuntu-latest,  r: 'oldrel-1'}
 
     env:
+      R_DEFAULT_INTERNET_TIMEOUT: 300
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
       R_KEEP_PKG_SOURCE: yes
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - uses: r-lib/actions/setup-pandoc@v2
 
@@ -37,6 +43,20 @@ jobs:
           http-user-agent: ${{ matrix.config.http-user-agent }}
           use-public-rspm: true
 
+      - name: Install system dependencies on MacOS
+        if: runner.os == 'macOS'
+        run: |
+          sudo curl --location https://sourceforge.net/projects/mcmc-jags/files/JAGS/4.x/Mac%20OS%20X/JAGS-4.3.1.pkg -o /usr/local/JAGS-latest.pkg
+          sudo installer -pkg /usr/local/JAGS-latest.pkg -target /usr/local/bin/
+
+          
+      - name: Install system dependencies on Windows # the --location flag is needed to allow URI redirection
+        if: runner.os == 'Windows'
+        run: |
+          curl --location https://sourceforge.net/projects/mcmc-jags/files/latest/download -o C:\JAGS-latest.exe
+          C:\JAGS-latest.exe /S
+        shell: cmd
+
       - uses: r-lib/actions/setup-r-dependencies@v2
         with:
           extra-packages: any::rcmdcheck
diff --git a/DESCRIPTION b/DESCRIPTION
index f50db63..8cc4db9 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -10,11 +10,12 @@ License: MIT
 Date: 2023-04-13
 Depends: R (>= 3.3.1)
 Imports:
-  rjags
+  runjags
 Suggests:
   covr,
   knitr,
   rmarkdown,
   testthat
+SystemRequirements: JAGS 4.x.y
 Encoding: UTF-8
 RoxygenNote: 7.2.3
diff --git a/tests/testthat/test-01-xx.R b/tests/testthat/test-01-xx.R
index f7a8103..dc21066 100644
--- a/tests/testthat/test-01-xx.R
+++ b/tests/testthat/test-01-xx.R
@@ -5,3 +5,14 @@ test_that("test", {
   expect_equal(1, 1)
   
 })
+
+message(runjags::findjags())
+message(runjags::runjags.getOption("jagspath"))
+
+message(runjags::testjags())
+
+test_that("test", {
+
+  expect_equal(1, 1)
+  
+})
\ No newline at end of file