diff --git a/.github/workflows/check-licenses.yml b/.github/workflows/check-licenses.yml
index a904b2562..28852f836 100644
--- a/.github/workflows/check-licenses.yml
+++ b/.github/workflows/check-licenses.yml
@@ -17,7 +17,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@main
         with:
-          go-version: 1.21.1
+          go-version: 1.21.3
         id: go
       - name: Code checkout
         uses: actions/checkout@master
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index c16fa98e0..792412847 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -57,7 +57,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.21.1
+          go-version: 1.21.3
           check-latest: true
           cache: true
         if: ${{ matrix.language == 'go' }}
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index a40436511..6a51173ab 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -32,7 +32,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.21.1
+          go-version: 1.21.3
           check-latest: true
           cache: true
 
@@ -56,7 +56,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.21.1
+          go-version: 1.21.3
           check-latest: true
           cache: true
 
@@ -81,7 +81,7 @@ jobs:
         id: go
         uses: actions/setup-go@v3
         with:
-          go-version: 1.21.1
+          go-version: 1.21.3
           check-latest: true
           cache: true
 
diff --git a/app/vmui/Dockerfile-web b/app/vmui/Dockerfile-web
index 02d12697e..c83d8e3a2 100644
--- a/app/vmui/Dockerfile-web
+++ b/app/vmui/Dockerfile-web
@@ -1,4 +1,4 @@
-FROM golang:1.21.1 as build-web-stage
+FROM golang:1.21.3 as build-web-stage
 COPY build /build
 
 WORKDIR /build
diff --git a/deployment/docker/Makefile b/deployment/docker/Makefile
index 8e273ac65..e0031fdfb 100644
--- a/deployment/docker/Makefile
+++ b/deployment/docker/Makefile
@@ -5,7 +5,7 @@ DOCKER_NAMESPACE := victoriametrics
 ROOT_IMAGE ?= alpine:3.18.4
 CERTS_IMAGE := alpine:3.18.4
 
-GO_BUILDER_IMAGE := golang:1.21.1-alpine
+GO_BUILDER_IMAGE := golang:1.21.3-alpine
 BUILDER_IMAGE := local/builder:2.0.0-$(shell echo $(GO_BUILDER_IMAGE) | tr :/ __)-1
 BASE_IMAGE := local/base:1.1.4-$(shell echo $(ROOT_IMAGE) | tr :/ __)-$(shell echo $(CERTS_IMAGE) | tr :/ __)
 
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index dc5774edb..251ebc868 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -15,6 +15,8 @@ The following tip changes can be tested by building VictoriaMetrics components f
 
 ## v1.87.x long-time support release (LTS)
 
+* SECURITY: upgrade Go builder from Go1.21.1 to Go1.21.3. See [the list of issues addressed in Go1.21.2](https://github.com/golang/go/issues?q=milestone%3AGo1.21.2+label%3ACherryPickApproved) and [the list of issues addressed in Go1.21.3](https://github.com/golang/go/issues?q=milestone%3AGo1.21.3+label%3ACherryPickApproved).
+
 * BUGFIX: [storage](https://docs.victoriametrics.com/Single-server-VictoriaMetrics.html): prevent from livelock when [forced merge](https://docs.victoriametrics.com/#forced-merge) is called under high data ingestion. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4987).
 * BUGFIX: [Graphite Render API](https://docs.victoriametrics.com/#graphite-render-api-usage): correctly return `null` instead of `Inf` in JSON query responses. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3783).
 * BUGFIX: [vminsert](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html): fix ingestion via [multitenant url](https://docs.victoriametrics.com/Cluster-VictoriaMetrics.html#multitenancy-via-labels) for opentsdbhttp. See [this issue](https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5061). The bug has been introduced in [v1.87.8](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.87.8).
diff --git a/snap/local/Makefile b/snap/local/Makefile
index 01b62ce8f..b14fe9422 100644
--- a/snap/local/Makefile
+++ b/snap/local/Makefile
@@ -1,4 +1,4 @@
-GO_VERSION ?=1.21.1
+GO_VERSION ?=1.21.3
 SNAP_BUILDER_IMAGE := local/snap-builder:2.0.0-$(shell echo $(GO_VERSION) | tr :/ __)