diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index c5a3a42..d0ad94d 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        go-version: [ '1.18', '1.21', '1.22.x' ]
+        go-version: [ '1.21', '1.22.x' ]
 
     steps:
       - uses: actions/checkout@v4
diff --git a/go.mod b/go.mod
index 2a3fa01..276e6ea 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,3 @@
 module github.com/beevik/etree
 
-go 1.18
+go 1.21