diff --git a/Dockerfile b/Dockerfile
index 52dda62..dc5ffda 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,4 +12,6 @@ FROM scratch
 COPY --from=builder /checker-zonemaster /checker-zonemaster
 USER 65534:65534
 EXPOSE 8080
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+  CMD ["/checker-zonemaster", "-healthcheck"]
 ENTRYPOINT ["/checker-zonemaster"]
diff --git a/go.mod b/go.mod
index e60db84..4835175 100644
--- a/go.mod
+++ b/go.mod
@@ -2,4 +2,4 @@ module git.happydns.org/checker-zonemaster
 
 go 1.25.0
 
-require git.happydns.org/checker-sdk-go v1.3.0
+require git.happydns.org/checker-sdk-go v1.5.0
diff --git a/go.sum b/go.sum
index fe4952c..c389c68 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +1,2 @@
-git.happydns.org/checker-sdk-go v1.3.0 h1:FG2kIhlJCzI0m35EhxSgn4UWc9M4ha6aZTeoChu4l7A=
-git.happydns.org/checker-sdk-go v1.3.0/go.mod h1:aNAcfYFfbhvH9kJhE0Njp5GX0dQbxdRB0rJ0KvSC5nI=
+git.happydns.org/checker-sdk-go v1.5.0 h1:5uD5Cm6xJ+lwnhbJ09iCXGHbYS9zRh+Yh0NeBHkAPBY=
+git.happydns.org/checker-sdk-go v1.5.0/go.mod h1:aNAcfYFfbhvH9kJhE0Njp5GX0dQbxdRB0rJ0KvSC5nI=