diff --git a/go.mod b/go.mod
index 708d98a..da8a399 100644
--- a/go.mod
+++ b/go.mod
@@ -1,7 +1,5 @@
 module github.com/lanrat/extsort
 
-go 1.23.0
+go 1.25.0
 
-toolchain go1.24.5
-
-require golang.org/x/sync v0.16.0
+require golang.org/x/sync v0.22.0
diff --git a/go.sum b/go.sum
index 878acfe..6cccfef 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +1,2 @@
-golang.org/x/sync v0.16.0 h1:ycBJEhp9p4vXvUZNszeOq0kGTPghopOL8q0fq3vstxw=
-golang.org/x/sync v0.16.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
+golang.org/x/sync v0.22.0 h1:SZjpbeLmrCk4xhRSZFNZW5gFUeCeFgjekvI/+gfScek=
+golang.org/x/sync v0.22.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=