diff --git a/doc/go_spec.html b/doc/go_spec.html
index 183bc7fb37..2b47fb2e83 100644
--- a/doc/go_spec.html
+++ b/doc/go_spec.html
@@ -1,6 +1,6 @@
 <!--{
 	"Title": "The Go Programming Language Specification",
-	"Subtitle": "Language version go1.25 (Feb 25, 2025)",
+	"Subtitle": "Language version go1.25 (Aug 12, 2025)",
 	"Path": "/ref/spec"
 }-->