diff --git a/project.yaml b/project.yaml
index ca3602f..534ab34 100644
--- a/project.yaml
+++ b/project.yaml
@@ -24,7 +24,7 @@ actions:
         log: output/icd10_ons_deaths_log.json
 
   validate_output:
-    run: python:latest python analysis/validate_output.py
+    run: python:v2 python analysis/validate_output.py
     needs:
       - icd10_apcs
       - icd10_ons_deaths