diff --git a/gokrazy/natlabapp/builddir/tailscale.com/go.mod b/gokrazy/natlabapp/builddir/tailscale.com/go.mod
index da21a1439..53bc11f9b 100644
--- a/gokrazy/natlabapp/builddir/tailscale.com/go.mod
+++ b/gokrazy/natlabapp/builddir/tailscale.com/go.mod
@@ -1,6 +1,6 @@
 module gokrazy/build/tsapp
 
-go 1.23.1
+go 1.25.5
 
 replace tailscale.com => ../../../..
 
diff --git a/gokrazy/tsapp/builddir/tailscale.com/go.mod b/gokrazy/tsapp/builddir/tailscale.com/go.mod
index da21a1439..53bc11f9b 100644
--- a/gokrazy/tsapp/builddir/tailscale.com/go.mod
+++ b/gokrazy/tsapp/builddir/tailscale.com/go.mod
@@ -1,6 +1,6 @@
 module gokrazy/build/tsapp
 
-go 1.23.1
+go 1.25.5
 
 replace tailscale.com => ../../../..