diff --git a/go.mod b/go.mod
index a230d78..9b3626d 100644
--- a/go.mod
+++ b/go.mod
@@ -2,4 +2,4 @@ module tshaka.dev/diff
 
 go 1.24.0
 
-require golang.org/x/tools v0.39.0
+require golang.org/x/tools v0.40.0
diff --git a/go.sum b/go.sum
index ee24b26..711a6ed 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +1,2 @@
-golang.org/x/tools v0.39.0 h1:ik4ho21kwuQln40uelmciQPp9SipgNDdrafrYA4TmQQ=
-golang.org/x/tools v0.39.0/go.mod h1:JnefbkDPyD8UU2kI5fuf8ZX4/yUeh9W877ZeBONxUqQ=
+golang.org/x/tools v0.40.0 h1:yLkxfA+Qnul4cs9QA3KnlFu0lVmd8JJfoq+E41uSutA=
+golang.org/x/tools v0.40.0/go.mod h1:Ik/tzLRlbscWpqqMRjyWYDisX8bG13FrdXp3o4Sr9lc=