diff --git a/.github/workflows/docker-jepsen.yml b/.github/workflows/docker-jepsen.yml
index 94f161b0..33e02075 100644
--- a/.github/workflows/docker-jepsen.yml
+++ b/.github/workflows/docker-jepsen.yml
@@ -5,7 +5,7 @@ on:
     - cron: '0 0 * * *'
 
 env:
-  GO_VERSION: 1.20.5
+  GO_VERSION: 1.21.3
 
 jobs:
   test:
diff --git a/.github/workflows/docker-tests-8.0.yml b/.github/workflows/docker-tests-8.0.yml
index 1dc20e6d..c5dedb38 100644
--- a/.github/workflows/docker-tests-8.0.yml
+++ b/.github/workflows/docker-tests-8.0.yml
@@ -7,7 +7,7 @@ on:
     branches: [ master ]
 
 env:
-  GO_VERSION: 1.20.5
+  GO_VERSION: 1.21.3
 
 jobs:
   buildimages:
diff --git a/.github/workflows/docker-tests.yml b/.github/workflows/docker-tests.yml
index 4786da12..eff58baf 100644
--- a/.github/workflows/docker-tests.yml
+++ b/.github/workflows/docker-tests.yml
@@ -7,7 +7,7 @@ on:
     branches: [ master ]
 
 env:
-  GO_VERSION: 1.20.5
+  GO_VERSION: 1.21.3
 
 jobs:
   buildimages:
diff --git a/.github/workflows/golangci-lint.yml b/.github/workflows/golangci-lint.yml
index 548defc4..eedffe8d 100644
--- a/.github/workflows/golangci-lint.yml
+++ b/.github/workflows/golangci-lint.yml
@@ -16,7 +16,7 @@ jobs:
     steps:
       - uses: actions/setup-go@v3
         with:
-          go-version: 1.20.5
+          go-version: 1.21.3
       - uses: actions/checkout@v3
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v3
diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
index 0e33c503..43191724 100644
--- a/.github/workflows/unit-tests.yml
+++ b/.github/workflows/unit-tests.yml
@@ -8,7 +8,7 @@ on:
     branches: [ master ]
 
 env:
-  GO_VERSION: 1.20.5
+  GO_VERSION: 1.21.3
 
 jobs:
   unittest:
diff --git a/go.mod b/go.mod
index 26a51205..0d993151 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/yandex/mysync
 
-go 1.18
+go 1.21
 
 require (
 	github.com/cenkalti/backoff/v4 v4.2.1