diff --git a/build.env b/build.env
index c2bfe8009..2ac659f1d 100644
--- a/build.env
+++ b/build.env
@@ -19,7 +19,7 @@ BASE_IMAGE=quay.io/ceph/ceph:v18
 CEPH_VERSION=reef
 
 # standard Golang options
-GOLANG_VERSION=1.21.5
+GOLANG_VERSION=1.21.9
 GO111MODULE=on
 
 # commitlint version
diff --git a/go.mod b/go.mod
index ac06b7d44..502d91bfd 100644
--- a/go.mod
+++ b/go.mod
@@ -2,7 +2,7 @@ module github.com/ceph/ceph-csi
 
 go 1.21
 
-toolchain go1.21.5
+toolchain go1.21.9
 
 require (
 	github.com/IBM/keyprotect-go-client v0.12.2