diff --git a/Dockerfile b/Dockerfile
index f66305b3..02b15643 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,7 +5,7 @@ ENV OJ_ENV production
 ADD . /app
 WORKDIR /app
 
-HEALTHCHECK --interval=5s --retries=3 CMD python2 /app/deploy/health_check.py
+HEALTHCHECK --interval=5s --retries=3 CMD python3 /app/deploy/health_check.py
 
 RUN apk add --update --no-cache build-base nginx openssl curl unzip supervisor jpeg-dev zlib-dev postgresql-dev freetype-dev && \
     pip install --no-cache-dir -r /app/deploy/requirements.txt && \
diff --git a/deploy/health_check.py b/deploy/health_check.py
index f5065a25..472d9e84 100644
--- a/deploy/health_check.py
+++ b/deploy/health_check.py
@@ -1,11 +1,11 @@
-import xmlrpclib
+import xmlrpc.client
 
 if __name__ == "__main__":
     try:
-        server = xmlrpclib.Server("http://localhost:9005/RPC2")
-        info = server.supervisor.getAllProcessInfo()
-        error_states = list(filter(lambda x: x["state"] != 20, info))
-        exit(len(error_states))
+        with xmlrpc.client.ServerProxy("http://localhost:9005/RPC2") as server:
+            info = server.supervisor.getAllProcessInfo()
+            error_states = list(filter(lambda x: x["state"] != 20, info))
+            exit(len(error_states))
     except Exception as e:
         print(e.with_traceback())
         exit(1)