diff --git a/.github/workflows/build-book.yaml b/.github/workflows/build-book.yaml
index 61635ac..c9ef0d5 100644
--- a/.github/workflows/build-book.yaml
+++ b/.github/workflows/build-book.yaml
@@ -33,7 +33,7 @@ jobs:
         shell: Rscript {0}
         run: |
           cmdstanr::check_cmdstan_toolchain(fix = TRUE)
-          cmdstanr::install_cmdstan()
+          cmdstanr::install_cmdstan(version = "2.32.2")
 
       - uses: quarto-dev/quarto-actions/setup@v2