diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0e2501f..21fa221 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
     strategy:
       matrix:
         platform: [ubuntu-latest]
-        go-version: [1.20.x, 1.19.x]
+        go-version: [1.21.x, 1.20.x]
 
     runs-on: ${{ matrix.platform }}
 
diff --git a/go.mod b/go.mod
index b02cd82..bbf52c7 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/go-zeromq/zmq4
 
-go 1.19
+go 1.20
 
 require (
 	github.com/go-zeromq/goczmq/v4 v4.2.2