diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index e57fa18..567902e 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go: ['1.18', '1.19', '1.20', '1.21']
+        go: ['1.24', '1.25']
     steps:
     - uses: actions/checkout@v3
 
diff --git a/.github/workflows/validation.yml b/.github/workflows/validation.yml
index e005484..211823e 100644
--- a/.github/workflows/validation.yml
+++ b/.github/workflows/validation.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go: ['1.21']
+        go: ['1.25']
     steps:
     - uses: actions/checkout@v3
 
diff --git a/go.mod b/go.mod
index 6162191..a5f914e 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/vbatts/go-mtree
 
-go 1.17
+go 1.21
 
 require (
 	github.com/davecgh/go-spew v1.1.1