diff --git a/Dockerfile b/Dockerfile
index 0dd6172..5ac04d7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,4 +12,6 @@ FROM scratch
 COPY --from=builder /checker-email-keys /checker-email-keys
 USER 65534:65534
 EXPOSE 8080
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+  CMD ["/checker-email-keys", "-healthcheck"]
 ENTRYPOINT ["/checker-email-keys"]
diff --git a/go.mod b/go.mod
index d3155f3..d6f2629 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module git.happydns.org/checker-email-keys
 go 1.25.0
 
 require (
-	git.happydns.org/checker-sdk-go v1.4.0
+	git.happydns.org/checker-sdk-go v1.5.0
 	github.com/ProtonMail/go-crypto v1.1.0-alpha.0
 	github.com/miekg/dns v1.1.72
 )
diff --git a/go.sum b/go.sum
index a091007..ee33948 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,5 @@
-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=
 github.com/ProtonMail/go-crypto v1.1.0-alpha.0 h1:nHGfwXmFvJrSR9xu8qL7BkO4DqTHXE9N5vPhgY2I+j0=
 github.com/ProtonMail/go-crypto v1.1.0-alpha.0/go.mod h1:rA3QumHc/FZ8pAHreoekgiAbzpNsfQAosU5td4SnOrE=
 github.com/cloudflare/circl v1.3.7 h1:qlCDlTPz2n9fu58M0Nh1J/JzcFpfgkFHHX3O35r5vcU=