diff --git a/.github/workflows/R-CDM-check.yml b/.github/workflows/R-CMD-check-macOS.yml
similarity index 51%
rename from .github/workflows/R-CDM-check.yml
rename to .github/workflows/R-CMD-check-macOS.yml
index feb8f5635..1ffba8f70 100644
--- a/.github/workflows/R-CDM-check.yml
+++ b/.github/workflows/R-CMD-check-macOS.yml
@@ -8,7 +8,7 @@
 
 on: [push, pull_request]
 
-name: R-CMD-check
+name: R-CMD-check-macOS
 
 jobs:
   R-CMD-check:
@@ -20,18 +20,9 @@ jobs:
       fail-fast: false
       matrix:
         config:
-#          - {os: macOS-latest,   r: 'devel'}
+          - {os: macOS-latest,   r: '4.1.2'}
+#          - {os: macOS-latest,   r: 'devel'} # Error in library(devtools) : there is no package called ‘devtools’
           - {os: macOS-latest,   r: 'release'}
-#          - {os: windows-latest, r: 'devel'}
-          - {os: windows-latest, r: 'release'}
-#          - {os: ubuntu-latest,  r: 'devel'} # error in "Run r-lib/actions/setup-r@master"
-#          - {os: ubuntu-latest,  r: 'release'} ##[error]Error in library(devtools) : there is no package called ‘devtools’
-#          - {os: ubuntu-18.04,   r: 'release'} ##[error]Error in library(devtools) : there is no package called ‘devtools’
-          - {os: ubuntu-16.04,   r: 'release', rspm: "https://packagemanager.rstudio.com/cran/__linux__/xenial/latest"}
-          - {os: ubuntu-16.04,   r: 'oldrel',  rspm: "https://packagemanager.rstudio.com/cran/__linux__/xenial/latest"}
-          - {os: ubuntu-16.04,   r: '3.5',     rspm: "https://packagemanager.rstudio.com/cran/__linux__/xenial/latest"}
-          - {os: ubuntu-16.04,   r: '3.4',     rspm: "https://packagemanager.rstudio.com/cran/__linux__/xenial/latest"}
-          - {os: ubuntu-16.04,   r: '3.3',     rspm: "https://packagemanager.rstudio.com/cran/__linux__/xenial/latest"}
 
     env:
       R_REMOTES_NO_ERRORS_FROM_WARNINGS: true
@@ -46,22 +37,21 @@ jobs:
           r-version: ${{ matrix.config.r }}
 
       - uses: r-lib/actions/setup-pandoc@master
-      
+
       - name: Install dependencies
-        run: Rscript -e "install.packages(c('devtools', dependencies=TRUE))" -e "install.packages(c('rcmdcheck', 'devtools', 'Rcpp', 'RcppEigen', 'BH', 'testthat'))"
-      
+        run: Rscript -e "install.packages(c('devtools', dependencies=TRUE))" -e "install.packages(c('rcmdcheck', 'devtools', 'Rcpp', 'RcppEigen', 'BH', 'testthat', 'downloader', 'xfun'))";
+
       - name: Check
         env:
           _R_CHECK_CRAN_INCOMING_REMOTE_: false
-        run: cd cran_gen/; 
-             Rscript genCRANpkg.R; 
+        run: cd cran_gen/;
+             Rscript genCRANpkg.R;
              cd cran_package;
-             Rscript -e "library(rcmdcheck)" -e "rcmdcheck::rcmdcheck(args = c('--no-manual', '--as-cran'), error_on = 'warning', check_dir = 'check')"
+             Rscript -e "library(rcmdcheck)" -e "rcmdcheck::rcmdcheck(args = c('--no-manual'), error_on = 'warning', check_dir = 'check')"
 
       - name: Upload check results
         if: failure()
         uses: actions/upload-artifact@master
         with:
           name: ${{ runner.os }}-r${{ matrix.config.r }}-results
-          path: check
-
+          path: check
\ No newline at end of file
diff --git a/.github/workflows/R-CMD-check-ubuntu.yml b/.github/workflows/R-CMD-check-ubuntu.yml
new file mode 100644
index 000000000..e718f10c0
--- /dev/null
+++ b/.github/workflows/R-CMD-check-ubuntu.yml
@@ -0,0 +1,60 @@
+##############################################################################
+# GitHub Actions Workflow to test the R interface of volesti
+#
+# Copyright (c) 2020 Vissarion Fisikopoulos
+#
+# Licensed under GNU LGPL.3, see LICENCE file
+##############################################################################
+
+on: [push, pull_request]
+
+name: R-CMD-check-ubuntu
+
+jobs:
+  R-CMD-check:
+    runs-on: ${{ matrix.config.os }}
+
+    name: ${{ matrix.config.os }} (${{ matrix.config.r }})
+
+    strategy:
+      fail-fast: false
+      matrix:
+        config:
+         - {os: ubuntu-latest,  r: 'devel'}
+         - {os: ubuntu-latest,  r: 'release'}
+         - {os: ubuntu-18.04,   r: 'devel'}
+         - {os: ubuntu-18.04,   r: 'release'}
+
+    env:
+      R_REMOTES_NO_ERRORS_FROM_WARNINGS: true
+      RSPM: ${{ matrix.config.rspm }}
+      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
+
+    steps:
+      - uses: actions/checkout@v2
+      - run: sudo apt-get update || true;
+             sudo apt install build-essential libcurl4-gnutls-dev libxml2-dev libssl-dev libgit2-dev libfontconfig1-dev libharfbuzz-dev libfribidi-dev;
+
+      - uses: r-lib/actions/setup-r@v2
+        with:
+          r-version: ${{ matrix.config.r }}
+
+      - uses: r-lib/actions/setup-pandoc@master
+
+      - name: Install dependencies
+        run: Rscript -e "install.packages(c('testthat', 'pkgload', 'rcmdcheck', 'devtools', 'Rcpp', 'RcppEigen', 'BH', 'downloader', 'xfun', dependencies=TRUE))";
+
+      - name: Check
+        env:
+          _R_CHECK_CRAN_INCOMING_REMOTE_: false
+        run: cd cran_gen/;
+             Rscript genCRANpkg.R;
+             cd cran_package;
+             Rscript -e "library(rcmdcheck)" -e "rcmdcheck::rcmdcheck(args = c('--no-manual'), error_on = 'warning', check_dir = 'check')"
+
+      - name: Upload check results
+        if: failure()
+        uses: actions/upload-artifact@master
+        with:
+          name: ${{ runner.os }}-r${{ matrix.config.r }}-results
+          path: check
\ No newline at end of file
diff --git a/.github/workflows/R-CMD-check-windows.yml b/.github/workflows/R-CMD-check-windows.yml
new file mode 100644
index 000000000..b60d29b6d
--- /dev/null
+++ b/.github/workflows/R-CMD-check-windows.yml
@@ -0,0 +1,56 @@
+##############################################################################
+# GitHub Actions Workflow to test the R interface of volesti
+#
+# Copyright (c) 2020 Vissarion Fisikopoulos
+#
+# Licensed under GNU LGPL.3, see LICENCE file
+##############################################################################
+
+on: [push, pull_request]
+
+name: R-CMD-check-windows
+
+jobs:
+  R-CMD-check:
+    runs-on: ${{ matrix.config.os }}
+
+    name: ${{ matrix.config.os }} (${{ matrix.config.r }})
+
+    strategy:
+      fail-fast: false
+      matrix:
+        config:
+#           - {os: windows-latest, r: 'devel'} # Error in library(devtools) : there is no package called ‘devtools’
+          - {os: windows-latest, r: 'release'}
+
+    env:
+      R_REMOTES_NO_ERRORS_FROM_WARNINGS: true
+      RSPM: ${{ matrix.config.rspm }}
+      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: r-lib/actions/setup-r@master
+        with:
+          r-version: ${{ matrix.config.r }}
+
+      - uses: r-lib/actions/setup-pandoc@master
+
+      - name: Install dependencies
+        run: Rscript -e "install.packages(c('devtools', dependencies=TRUE))" -e "install.packages(c('rcmdcheck', 'devtools', 'Rcpp', 'RcppEigen', 'BH', 'testthat', 'downloader', 'xfun'))"
+
+      - name: Check
+        env:
+          _R_CHECK_CRAN_INCOMING_REMOTE_: false
+        run: cd cran_gen/;
+             Rscript genCRANpkg.R;
+             cd cran_package;
+             Rscript -e "library(rcmdcheck)" -e "rcmdcheck::rcmdcheck(args = c('--no-manual'), error_on = 'warning', check_dir = 'check')"
+
+      - name: Upload check results
+        if: failure()
+        uses: actions/upload-artifact@master
+        with:
+          name: ${{ runner.os }}-r${{ matrix.config.r }}-results
+          path: check
\ No newline at end of file