diff --git a/.github/workflows/issue-deduplicator.yml b/.github/workflows/issue-deduplicator.yml
index 05453450e4..72c4d25f15 100644
--- a/.github/workflows/issue-deduplicator.yml
+++ b/.github/workflows/issue-deduplicator.yml
@@ -45,6 +45,7 @@ jobs:
           openai_api_key: ${{ secrets.CODEX_OPENAI_API_KEY }}
           prompt_file: .github/prompts/issue-deduplicator.txt
           require_repo_write: false
+          codex_version: 0.43.0-alpha.16
 
   comment-on-issue:
     name: Comment with potential duplicates
diff --git a/.github/workflows/issue-labeler.yml b/.github/workflows/issue-labeler.yml
index 24b9276db0..8e35d407ec 100644
--- a/.github/workflows/issue-labeler.yml
+++ b/.github/workflows/issue-labeler.yml
@@ -29,6 +29,7 @@ jobs:
           openai_api_key: ${{ secrets.CODEX_OPENAI_API_KEY }}
           prompt_file: .github/prompts/issue-labeler.txt
           require_repo_write: false
+          codex_version: 0.43.0-alpha.16
 
   apply-labels:
     name: Apply labels from Codex output