diff --git a/checker/rule.go b/checker/rule.go
index 29ed887..3b0886c 100644
--- a/checker/rule.go
+++ b/checker/rule.go
@@ -32,14 +32,14 @@ func (r *xmppRule) ValidateOptions(opts sdk.CheckerOptions) error {
 	return nil
 }
 
-func (r *xmppRule) Evaluate(ctx context.Context, obs sdk.ObservationGetter, opts sdk.CheckerOptions) sdk.CheckState {
+func (r *xmppRule) Evaluate(ctx context.Context, obs sdk.ObservationGetter, opts sdk.CheckerOptions) []sdk.CheckState {
 	var data XMPPData
 	if err := obs.Get(ctx, ObservationKeyXMPP, &data); err != nil {
-		return sdk.CheckState{
+		return []sdk.CheckState{{
 			Status:  sdk.StatusError,
 			Message: fmt.Sprintf("failed to load XMPP observation: %v", err),
 			Code:    "xmpp.observation_error",
-		}
+		}}
 	}
 
 	issues := append([]Issue(nil), data.Issues...)
@@ -113,26 +113,26 @@ func (r *xmppRule) Evaluate(ctx context.Context, obs sdk.ObservationGetter, opts
 
 	switch worst {
 	case sdk.StatusOK:
-		return sdk.CheckState{
+		return []sdk.CheckState{{
 			Status:  sdk.StatusOK,
 			Message: fmt.Sprintf("XMPP operational (c2s=%v, s2s=%v, %d endpoints)", data.Coverage.WorkingC2S, data.Coverage.WorkingS2S, len(data.Endpoints)),
 			Code:    "xmpp.ok",
 			Meta:    meta,
-		}
+		}}
 	case sdk.StatusWarn:
-		return sdk.CheckState{
+		return []sdk.CheckState{{
 			Status:  sdk.StatusWarn,
 			Message: "XMPP works with warnings: " + joinTop(warnMsgs, 2),
 			Code:    firstWarnCode,
 			Meta:    meta,
-		}
+		}}
 	default:
-		return sdk.CheckState{
+		return []sdk.CheckState{{
 			Status:  sdk.StatusCrit,
 			Message: "XMPP broken: " + joinTop(critMsgs, 2),
 			Code:    firstCritCode,
 			Meta:    meta,
-		}
+		}}
 	}
 }
 
diff --git a/go.mod b/go.mod
index e181a72..436824e 100644
--- a/go.mod
+++ b/go.mod
@@ -3,8 +3,8 @@ module git.happydns.org/checker-xmpp
 go 1.25.0
 
 require (
-	git.happydns.org/checker-sdk-go v1.1.0
-	git.happydns.org/checker-tls v0.1.0
+	git.happydns.org/checker-sdk-go v1.2.0
+	git.happydns.org/checker-tls v0.2.0
 	github.com/miekg/dns v1.1.72
 )
 
diff --git a/go.sum b/go.sum
index 5ff535c..60c7216 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,7 @@
-git.happydns.org/checker-sdk-go v0.0.1 h1:4RxCJr73HWKxjOyU/6NJMO8lXJmH0gMLA68EzTqLbQI=
-git.happydns.org/checker-sdk-go v0.0.1/go.mod h1:aNAcfYFfbhvH9kJhE0Njp5GX0dQbxdRB0rJ0KvSC5nI=
+git.happydns.org/checker-sdk-go v1.2.0 h1:v4MpKAz0W3PwP+bxx3pya8w893sVH5xTD1of1cc0TV8=
+git.happydns.org/checker-sdk-go v1.2.0/go.mod h1:aNAcfYFfbhvH9kJhE0Njp5GX0dQbxdRB0rJ0KvSC5nI=
+git.happydns.org/checker-tls v0.2.0 h1:2dYpcePBylUc3le76fFlLbxraiLpGESmOhx4NfD7REM=
+git.happydns.org/checker-tls v0.2.0/go.mod h1:0ZSG0CTP007SHBPE7qInESVIOcW+xgucHUhHgj6MeZ8=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/miekg/dns v1.1.72 h1:vhmr+TF2A3tuoGNkLDFK9zi36F2LS+hKTRW0Uf8kbzI=