diff --git a/backend/test_certificate_signer/Dockerfile b/backend/test_certificate_signer/Dockerfile
index 2db0f36b8..7b5d55196 100644
--- a/backend/test_certificate_signer/Dockerfile
+++ b/backend/test_certificate_signer/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:lts-alpine
+FROM node:20.15.1-alpine3.20
 WORKDIR /app
 ENV PATH /app/node_modules/.bin:$PATH
 ENV CERTIFICATE_NAMESPACE "https://cowin.gov.in/credentials/testCertificate/v1"