diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bb3d87d..cd4058f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,7 +13,6 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        go-version: ['1.25']
     runs-on: ${{ matrix.os }}
 
     steps:
@@ -24,7 +23,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@b7ad1dad31e06c5925ef5d2fc7ad053ef454303e # v7.0.0
         with:
-          go-version: ${{ matrix.go-version }}
+          go-version-file: go.mod
 
       - name: Build
         run: go build -v ./...
@@ -42,7 +41,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@b7ad1dad31e06c5925ef5d2fc7ad053ef454303e # v7.0.0
         with:
-          go-version: '1.25'
+          go-version-file: go.mod
 
       - name: golangci-lint
         run: go tool golangci-lint run ./...
diff --git a/.github/workflows/swagger.yml b/.github/workflows/swagger.yml
index 625f944..38c42c3 100644
--- a/.github/workflows/swagger.yml
+++ b/.github/workflows/swagger.yml
@@ -19,7 +19,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@b7ad1dad31e06c5925ef5d2fc7ad053ef454303e # v7.0.0
         with:
-          go-version: '1.25'
+          go-version-file: go.mod
 
       - name: Install swag
         run: go install github.com/swaggo/swag/cmd/swag@latest
diff --git a/Dockerfile b/Dockerfile
index 9c51d30..9a64c5a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM --platform=$BUILDPLATFORM golang:1.26.5-alpine AS builder
+FROM --platform=$BUILDPLATFORM golang:1.26.6-alpine AS builder
 
 WORKDIR /src
 
diff --git a/README.md b/README.md
index 01012e2..ab42766 100644
--- a/README.md
+++ b/README.md
@@ -1024,7 +1024,7 @@ The proxy will recreate the database on next start.
 
 Requirements:
 
-- Go 1.25 or later
+- Go (the project version is declared in `go.mod`)
 
 ```bash
 git clone https://github.com/git-pkgs/proxy.git
diff --git a/go.mod b/go.mod
index 3449818..8c7165a 100644
--- a/go.mod
+++ b/go.mod
@@ -2,6 +2,8 @@ module github.com/git-pkgs/proxy
 
 go 1.25.6
 
+toolchain go1.26.6
+
 require (
 	github.com/BurntSushi/toml v1.6.0
 	github.com/CycloneDX/cyclonedx-go v0.11.0