diff --git a/proxy/Dockerfile b/proxy/Dockerfile
index 2783b1ac39..ac306952eb 100644
--- a/proxy/Dockerfile
+++ b/proxy/Dockerfile
@@ -11,6 +11,6 @@ FROM gcr.io/distroless/base-debian10:debug
 
 COPY --from=builder /work/proxy /
 
-HEALTHCHECK CMD [ "wget", "spider", "http://localhost:4180/pbprox/ping" ]
+HEALTHCHECK CMD [ "wget", "--spider", "http://localhost:4180/pbprox/ping" ]
 
 ENTRYPOINT ["/proxy"]