diff --git a/Dockerfile b/Dockerfile
index e6578448..d52a345c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -23,7 +23,7 @@ ENV SB_HOSTNAME=0.0.0.0 \
     SB_PORT=3000
 
 EXPOSE 3000
-HEALTHCHECK CMD curl --fail "http://localhost:$SB_PORT$SB_URL_PREFIX/.ping" || exit 1
+HEALTHCHECK CMD curl --fail "http://localhost:$SB_PORT/.instance" || exit 1
 
 COPY silverbullet-${TARGETARCH} /silverbullet
 RUN chmod +x /silverbullet