diff --git a/Dockerfile-openresty b/Dockerfile-openresty
index 4375705..aba9144 100644
--- a/Dockerfile-openresty
+++ b/Dockerfile-openresty
@@ -1,6 +1,11 @@
-FROM openresty/openresty
+FROM openresty/openresty:latest
 
-RUN apk add --no-cache git curl luarocks \
-  && luarocks install lua-resty-openidc \
-  && luarocks install lua-resty-session \
-  && luarocks install lua-cjson
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+        git \
+        curl \
+        luarocks && \
+    luarocks install lua-resty-openidc && \
+    luarocks install lua-resty-session && \
+    luarocks install lua-cjson && \
+    rm -rf /var/lib/apt/lists/*