diff --git a/Dockerfile b/Dockerfile
index ed44d7b..03e8bf7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,9 +1,11 @@
 FROM quay.io/thallian/confd-env:latest
 
+ENV OPENRESTY_VERSION 1.11.2.2
+
 RUN addgroup syncer
 RUN adduser -h /app -D -G syncer syncer
 
-RUN apk --no-cache add tar redis make git openssl perl gcc musl-dev pcre pcre-dev openssl-dev lua lua-dev unzip zlib zlib-dev curl luarocks libgcc
+RUN apk --no-cache add tar redis make git libressl perl gcc musl-dev pcre pcre-dev openssl-dev lua lua-dev unzip zlib zlib-dev curl luarocks libgcc
 
 WORKDIR /app
 
@@ -13,7 +15,7 @@ RUN luarocks-5.1 install redis-lua
 RUN luarocks-5.1 install busted
 
 RUN mkdir /app/openresty
-RUN wget -qO- https://openresty.org/download/openresty-1.9.15.1.tar.gz | tar -xz -C /app/openresty --strip 1
+RUN wget -qO- https://openresty.org/download/openresty-$OPENRESTY_VERSION.tar.gz | tar -xz -C /app/openresty --strip 1
 
 WORKDIR /app/openresty
 RUN ./configure --prefix=/opt/openresty && make && make install