diff --git a/Dockerfile b/Dockerfile
index ab52673..c4abb45 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,4 +12,6 @@ FROM scratch
 COPY --from=builder /checker-tls /checker-tls
 USER 65534:65534
 EXPOSE 8080
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+  CMD ["/checker-tls", "-healthcheck"]
 ENTRYPOINT ["/checker-tls"]
diff --git a/go.mod b/go.mod
index bde2901..9656a31 100644
--- a/go.mod
+++ b/go.mod
@@ -2,4 +2,4 @@ module git.happydns.org/checker-tls
 
 go 1.25.0
 
-require git.happydns.org/checker-sdk-go v1.4.0
+require git.happydns.org/checker-sdk-go v1.5.0
diff --git a/go.sum b/go.sum
index 072aab1..c389c68 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +1,2 @@
-git.happydns.org/checker-sdk-go v1.4.0 h1:sO8EnF3suhNgYLRsbmCZWJOymH/oNMrOUqj3FEzJArs=
-git.happydns.org/checker-sdk-go v1.4.0/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=