diff --git a/PROJECT_PLAN.md b/PROJECT_PLAN.md
index 41e86f5..aacc9af 100644
--- a/PROJECT_PLAN.md
+++ b/PROJECT_PLAN.md
@@ -24,4 +24,7 @@ Does gene X expression correlate with disease severity?
 ## Success Criteria
 - [ ] Reproducible results (fixed random seed)
 - [ ] Publication-ready figures
-- [ ] Statistical significance determined
\ No newline at end of file
+- [ ] Statistical significance determined
+
+## Change log
+4.09.26 Update timeline