diff --git a/.github/workflows/main_ci.yml b/.github/workflows/main_ci.yml
index 892f53dfd..a193cc685 100644
--- a/.github/workflows/main_ci.yml
+++ b/.github/workflows/main_ci.yml
@@ -37,6 +37,7 @@ jobs:
         name: Install MacOS deps
         run: |
           brew install automake
+          brew install libtool
       - name: Install darshan-util
         run: |
           mkdir darshan_install
diff --git a/darshan-util/pydarshan/pyproject.toml b/darshan-util/pydarshan/pyproject.toml
index 9d6abc187..cba614c3e 100644
--- a/darshan-util/pydarshan/pyproject.toml
+++ b/darshan-util/pydarshan/pyproject.toml
@@ -98,6 +98,7 @@ repair-wheel-command = "auditwheel repair -w {dest_dir} {wheel}"
 [tool.cibuildwheel.macos]
 before-all = [
     "brew install automake",
+    "brew install libtool",
     "brew install openblas",
     "brew install lapack",
     "git submodule update --init",