diff --git a/.golangci.yml b/.golangci.yml
index c7d4f10..408ccda 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -19,6 +19,7 @@ issues:
         - lll
         - gomnd
         - maintidx
+        - exhaustruct
     - path: _test.go
       text: "fieldalignment: struct ((with .+ pointer bytes)|(of size .+)) could be .+"
 linters:
@@ -31,7 +32,6 @@ linters:
     - contextcheck
     - cyclop
     - decorder
-    - depguard
     - dogsled
     - dupl
     - dupword
diff --git a/go.mod b/go.mod
index daf19ff..06fc4ff 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,3 @@
 module github.com/weborama/uint128
 
-go 1.19
+go 1.21
diff --git a/make_tables.go b/make_tables.go
index e6b0fbc..eb75ecc 100644
--- a/make_tables.go
+++ b/make_tables.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build ignore
+//go:build ignore
 
 // This program generates bits_tables.go.