diff --git a/go.mod b/go.mod
index 27f637b..569fc23 100644
--- a/go.mod
+++ b/go.mod
@@ -3,6 +3,6 @@ module github.com/inlets/mixctl
 go 1.25.0
 
 require (
-	golang.org/x/sync v0.20.0
+	golang.org/x/sync v0.21.0
 	gopkg.in/yaml.v3 v3.0.1
 )
diff --git a/go.sum b/go.sum
index 71216de..af9d034 100644
--- a/go.sum
+++ b/go.sum
@@ -1,7 +1,5 @@
-golang.org/x/sync v0.7.0 h1:YsImfSBoP9QPYL0xyKJPq0gcaJdG3rInoqxTWbfQu9M=
-golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-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 v0.21.0 h1:HLII4xRRTtCRkxYp4HNFF0Js/Og6q2i++KXbg0gHCwM=
+golang.org/x/sync v0.21.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
diff --git a/vendor/golang.org/x/sync/errgroup/errgroup.go b/vendor/golang.org/x/sync/errgroup/errgroup.go
index f69fd75..c261a8e 100644
--- a/vendor/golang.org/x/sync/errgroup/errgroup.go
+++ b/vendor/golang.org/x/sync/errgroup/errgroup.go
@@ -109,7 +109,7 @@ func (g *Group) TryGo(f func() error) bool {
 	if g.sem != nil {
 		select {
 		case g.sem <- token{}:
-			// Note: this allows barging iff channels in general allow barging.
+			// Note: this allows barging if and only if channels in general allow barging.
 		default:
 			return false
 		}
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 2a0b82c..6b29c97 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -1,4 +1,4 @@
-# golang.org/x/sync v0.20.0
+# golang.org/x/sync v0.21.0
 ## explicit; go 1.25.0
 golang.org/x/sync/errgroup
 # gopkg.in/yaml.v3 v3.0.1