diff --git a/go.mod b/go.mod
index c3f5476..99b01bd 100644
--- a/go.mod
+++ b/go.mod
@@ -2,4 +2,4 @@ module github.com/acycl/weakmap
 
 go 1.25.0
 
-require golang.org/x/sync v0.20.0
+require golang.org/x/sync v0.22.0
diff --git a/go.sum b/go.sum
index 733d716..6cccfef 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +1,2 @@
-golang.org/x/sync v0.20.0 h1:e0PTpb7pjO8GAtTs2dQ6jYa5BWYlMuX047Dco/pItO4=
-golang.org/x/sync v0.20.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=
+golang.org/x/sync v0.22.0 h1:SZjpbeLmrCk4xhRSZFNZW5gFUeCeFgjekvI/+gfScek=
+golang.org/x/sync v0.22.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=