diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 2442bf32..e8294850 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -18,4 +18,4 @@ jobs:
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v9
         with:
-          version: v2.4
+          version: v2.12.2
diff --git a/pkg/output/prometheusserver/prommetric.go b/pkg/output/prometheusserver/prommetric.go
index b848936c..75869921 100644
--- a/pkg/output/prometheusserver/prommetric.go
+++ b/pkg/output/prometheusserver/prommetric.go
@@ -116,7 +116,7 @@ func (p *PromMetric) String() string {
 		}
 		sb.WriteString("],")
 	}
-	sb.WriteString(fmt.Sprintf("value=%f,", p.value))
+	fmt.Fprintf(&sb, "value=%f,", p.value)
 	sb.WriteString("time=")
 	if p.Time != nil {
 		sb.WriteString(p.Time.String())
diff --git a/pkg/reconcilers/configset/reconciler.go b/pkg/reconcilers/configset/reconciler.go
index ea2aca8b..2bab0094 100644
--- a/pkg/reconcilers/configset/reconciler.go
+++ b/pkg/reconcilers/configset/reconciler.go
@@ -408,7 +408,7 @@ func (r *reconciler) determineOverallStatus(_ context.Context, configSet *config
 	var sb strings.Builder
 	for _, targetStatus := range configSet.Status.Targets {
 		if targetStatus.Status == metav1.ConditionFalse {
-			sb.WriteString(fmt.Sprintf("target %s config not ready, msg %s;", targetStatus.Name, targetStatus.Message))
+			fmt.Fprintf(&sb, "target %s config not ready, msg %s;", targetStatus.Name, targetStatus.Message)
 		}
 	}
 	return sb.String()