diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 28538c3f3c..000109e175 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,4 +1,4 @@
-on: [push, pull_request, merge_group]
+on: [push, pull_request, merge_group, repository_dispatch]
 
 name: Continuous integration
 
@@ -15,6 +15,9 @@ jobs:
           - stable
           - beta
           - nightly
+        liboqs:
+          - pin
+          - main
     env:
       # 20 MiB stack
       RUST_MIN_STACK: 20971520
@@ -24,6 +27,10 @@ jobs:
         with:
           submodules: true
 
+      - name: Update liboqs to latest main
+        if: matrix.liboqs == 'main'
+        run: git submodule update --remote
+
       - name: Set stack size
         if: startsWith(matrix.os, 'windows')
         run: echo "RUSTFLAGS=-C link-arg=/STACK:20971520" >> $env:GITHUB_ENV
@@ -45,7 +52,7 @@ jobs:
 
       - name: Set OPENSSL_ROOT_DIR
         if: startsWith(matrix.os, 'macos')
-        run: echo "OPENSSL_ROOT_DIR=/usr/local/opt/openssl@1.1" >> $GITHUB_ENV
+        run: echo "OPENSSL_ROOT_DIR=$(brew --prefix openssl)" >> $GITHUB_ENV
 
       - name: Install Rust
         run: |