diff --git a/README.md b/README.md
index d90e7fb..6718e24 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,4 @@
+<!-- Last updated: 2026-04-21 -->
 # Modal Docker-in-gvisor Snapshot Testing
 
 ## Summary
@@ -23,4 +24,4 @@ Snapshots only succeed when:
 
 Starting dockerd creates persistent state that prevents snapshots, even after process termination and socket cleanup.
 
-The 5-second sleep requirement suggests initialization timing issues when docker-in-gvisor is enabled.
\ No newline at end of file
+The 5-second sleep requirement suggests initialization timing issues when docker-in-gvisor is enabled.