diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 380bd65..82427b3 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -19,7 +19,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        go-version: ['1.25.x']
+        go-version: ['1.26.x']
     runs-on: ${{ matrix.os }}
 
     steps:
@@ -60,7 +60,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.25.x'
+          go-version: '1.26.x'
           cache: true
 
       - name: Run golangci-lint
@@ -86,7 +86,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.25.x'
+          go-version: '1.26.x'
           cache: true
 
       - name: Run govulncheck
@@ -105,7 +105,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version: '1.25.x'
+          go-version: '1.26.x'
           cache: true
 
       - name: Build for multiple platforms
diff --git a/CLAUDE.md b/CLAUDE.md
index b45bdad..b727fd6 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -5,11 +5,11 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 ## Project Overview
 
 **Pingheat** is a cross-platform terminal application that visualizes network latency as a real-time scrolling heatmap.
-It optionally exports Prometheus metrics and targets Go 1.25+ on Linux, macOS, and Windows.
+It optionally exports Prometheus metrics and targets Go 1.26+ on Linux, macOS, and Windows.
 
 ## Development Dependencies
 
-**Required:** Go 1.25+, Git
+**Required:** Go 1.26+, Git
 
 **Optional:**
 
diff --git a/README.md b/README.md
index 14bbb38..20cd448 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 A cross-platform terminal application that visualizes network latency as a real-time scrolling heatmap, with optional Prometheus metrics export.
 
-![Go Version](https://img.shields.io/badge/Go-1.25+-00ADD8?logo=go)
+![Go Version](https://img.shields.io/badge/Go-1.26+-00ADD8?logo=go)
 ![Platform](https://img.shields.io/badge/Platform-Linux%20%7C%20macOS%20%7C%20Windows-blue)
 ![License](https://img.shields.io/badge/License-MIT-green)
 [![codecov](https://codecov.io/gh/pbv7/pingheat/branch/main/graph/badge.svg)](https://codecov.io/gh/pbv7/pingheat)
@@ -21,7 +21,7 @@ A cross-platform terminal application that visualizes network latency as a real-
 
 **Required:**
 
-- Go 1.25+ - [https://go.dev/dl/](https://go.dev/dl/)
+- Go 1.26+ - [https://go.dev/dl/](https://go.dev/dl/)
 - Git
 
 **Optional (for development):**
diff --git a/go.mod b/go.mod
index cc54ab4..f208854 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/pbv7/pingheat
 
-go 1.25.7
+go 1.26.4
 
 require (
 	github.com/charmbracelet/bubbletea v1.3.10