diff --git a/.github/workflows/render.yml b/.github/workflows/render.yml
index 9c067ec..b295c9c 100644
--- a/.github/workflows/render.yml
+++ b/.github/workflows/render.yml
@@ -73,8 +73,9 @@ jobs:
       - name: Get R and OS version
         id: get-version
         run: |
-          cat("##[set-output name=os-version;]", sessionInfo()$running, "\n", sep = "")
-          cat("##[set-output name=r-version;]", R.Version()$version.string, sep = "")
+          make_cmd <- function(name, value, var) sprintf("echo \"{%s}={%s}\" >> $%s", name, value, var)
+          system(make_cmd("os-version", sessionInfo()$running, GITHUB_OUTPUT))
+          system(make_cmd("r-version", R.Version()$version.string, $GITHUB_OUTPUT))
         shell: Rscript {0}
         
       - name: Restore Renv package cache
@@ -99,7 +100,7 @@ jobs:
 
       - name: Install Python dependencies
         run: |
-          pip install pandas datetime seaborn matplotlib
+          pip install pandas datetime seaborn matplotlib numpy
 
       - name: Render Quarto Project
         uses: quarto-dev/quarto-actions/render@v2
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..aa945c9
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,17 @@
+contourpy==1.2.0
+cycler==0.12.1
+DateTime==5.4
+fonttools==4.47.2
+kiwisolver==1.4.5
+matplotlib==3.8.2
+numpy==1.26.3
+packaging==23.2
+pandas==2.2.0
+pillow==10.2.0
+pyparsing==3.1.1
+python-dateutil==2.8.2
+pytz==2023.3.post1
+seaborn==0.13.1
+six==1.16.0
+tzdata==2023.4
+zope.interface==6.1