diff --git a/.github/workflows/accessibility.yml b/.github/workflows/accessibility.yml
index 6f1732c7..6cd367e2 100644
--- a/.github/workflows/accessibility.yml
+++ b/.github/workflows/accessibility.yml
@@ -1,7 +1,8 @@
 name: pa11y-accessibility-check
 
 on:
-  pull_request:
+  pull_request_target:
+    types: [opened, synchronize, reopened]
 
 jobs:
   accessibility_assessment_comment:
@@ -11,6 +12,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
         with:
+          ref: ${{ github.event.pull_request.head.sha }}
           fetch-depth: 0
 
       - name: Set up Python 3.11
diff --git a/home_page.md b/home_page.md
index 0e2ccb80..1ccf4a1e 100644
--- a/home_page.md
+++ b/home_page.md
@@ -13,4 +13,4 @@ You can contact the CfRR team at the following email: [codingforreproduciblerese
 
 Please register your interest in a particular course by completing the relevant form on the Workshop Schedule and Signup page available [here](cfrr_program_details/courses_overview.ipynb).
 
-For more details on the structure and use of this website, please go to ['How to use this website'](cfrr_program_details/how_to_use_CfRR.ipynb).
\ No newline at end of file
+For more details on the use of this website, please go to ['How to use this website'](cfrr_program_details/how_to_use_CfRR.ipynb).
\ No newline at end of file