diff --git a/Dockerfile b/Dockerfile
index 1182324..7c46f9c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@
 #
 # it exposes the data/ and secrets/ volumes in app root
 #
-FROM openresty/openresty:alpine-fat
+FROM openresty/openresty:1.25.3.2-5-alpine-fat
 
 RUN apk add --no-cache git make gcc g++ musl-dev libffi-dev openssl-dev sqlite-dev libsodium libsodium-dev imagemagick-dev openssl
 WORKDIR /app