diff --git a/Dockerfile b/Dockerfile
index a6568ee..a8519e8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ghcr.io/linuxserver/baseimage-alpine-nginx:3.12
+FROM ghcr.io/linuxserver/baseimage-alpine-nginx:3.13
 
 # set version label
 ARG BUILD_DATE
@@ -15,14 +15,14 @@ RUN \
 	curl \
 	memcached \
 	nginx \
+	nginx-mod-http-brotli \
+	nginx-mod-http-dav-ext \
 	nginx-mod-http-echo \
 	nginx-mod-http-fancyindex \
 	nginx-mod-http-geoip \
 	nginx-mod-http-geoip2 \
 	nginx-mod-http-headers-more \
 	nginx-mod-http-image-filter \
-	nginx-mod-http-lua \
-	nginx-mod-http-lua-upstream \
 	nginx-mod-http-nchan \
 	nginx-mod-http-perl \
 	nginx-mod-http-redis2 \
@@ -76,7 +76,7 @@ RUN \
  echo "**** configure nginx ****" && \
  rm -f /etc/nginx/conf.d/default.conf && \
  sed -i \
-	's|include /config/nginx/site-confs/\*;|include /config/nginx/site-confs/\*;\n\tlua_load_resty_core off;|g' \
+	's|include /config/nginx/site-confs/\*;|include /config/nginx/site-confs/\*;\n\t#Removed lua. Do not remove this comment|g' \
 	/defaults/nginx.conf
 
 # add local files
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index be7b554..c8b040d 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -1,4 +1,4 @@
-FROM ghcr.io/linuxserver/baseimage-alpine-nginx:arm64v8-3.12
+FROM ghcr.io/linuxserver/baseimage-alpine-nginx:arm64v8-3.13
 
 # set version label
 ARG BUILD_DATE
@@ -15,14 +15,14 @@ RUN \
 	curl \
 	memcached \
 	nginx \
+	nginx-mod-http-brotli \
+	nginx-mod-http-dav-ext \
 	nginx-mod-http-echo \
 	nginx-mod-http-fancyindex \
 	nginx-mod-http-geoip \
 	nginx-mod-http-geoip2 \
 	nginx-mod-http-headers-more \
 	nginx-mod-http-image-filter \
-	nginx-mod-http-lua \
-	nginx-mod-http-lua-upstream \
 	nginx-mod-http-nchan \
 	nginx-mod-http-perl \
 	nginx-mod-http-redis2 \
@@ -76,7 +76,7 @@ RUN \
  echo "**** configure nginx ****" && \
  rm -f /etc/nginx/conf.d/default.conf && \
  sed -i \
-	's|include /config/nginx/site-confs/\*;|include /config/nginx/site-confs/\*;\n\tlua_load_resty_core off;|g' \
+	's|include /config/nginx/site-confs/\*;|include /config/nginx/site-confs/\*;\n\t#Removed lua. Do not remove this comment|g' \
 	/defaults/nginx.conf
 
 # add local files
diff --git a/Dockerfile.armhf b/Dockerfile.armhf
index a431607..38117aa 100644
--- a/Dockerfile.armhf
+++ b/Dockerfile.armhf
@@ -1,4 +1,4 @@
-FROM ghcr.io/linuxserver/baseimage-alpine-nginx:arm32v7-3.12
+FROM ghcr.io/linuxserver/baseimage-alpine-nginx:arm32v7-3.13
 
 # set version label
 ARG BUILD_DATE
@@ -15,14 +15,14 @@ RUN \
 	curl \
 	memcached \
 	nginx \
+	nginx-mod-http-brotli \
+	nginx-mod-http-dav-ext \
 	nginx-mod-http-echo \
 	nginx-mod-http-fancyindex \
 	nginx-mod-http-geoip \
 	nginx-mod-http-geoip2 \
 	nginx-mod-http-headers-more \
 	nginx-mod-http-image-filter \
-	nginx-mod-http-lua \
-	nginx-mod-http-lua-upstream \
 	nginx-mod-http-nchan \
 	nginx-mod-http-perl \
 	nginx-mod-http-redis2 \
@@ -76,7 +76,7 @@ RUN \
  echo "**** configure nginx ****" && \
  rm -f /etc/nginx/conf.d/default.conf && \
  sed -i \
-	's|include /config/nginx/site-confs/\*;|include /config/nginx/site-confs/\*;\n\tlua_load_resty_core off;|g' \
+	's|include /config/nginx/site-confs/\*;|include /config/nginx/site-confs/\*;\n\t#Removed lua. Do not remove this comment|g' \
 	/defaults/nginx.conf
 
 # add local files
diff --git a/README.md b/README.md
index f5293c7..f2b48c1 100644
--- a/README.md
+++ b/README.md
@@ -223,6 +223,7 @@ Once registered you can define the dockerfile to use with `-f Dockerfile.aarch64
 
 ## Versions
 
+* **09.02.21:** - Rebasing to alpine 3.13. Add nginx mods brotli and dav-ext. Remove nginx mods lua and lua-upstream (due to regression over the last couple of years).
 * **08.09.20:** - Add php7-xsl.
 * **01.06.20:** - Rebasing to alpine 3.12.
 * **18.04.20:** - Fix unwanted shutdown of the container.
diff --git a/readme-vars.yml b/readme-vars.yml
index 13cd837..f576931 100644
--- a/readme-vars.yml
+++ b/readme-vars.yml
@@ -40,6 +40,7 @@ app_setup_block: |
 
 # changelog
 changelogs:
+  - { date: "09.02.21:", desc: "Rebasing to alpine 3.13. Add nginx mods brotli and dav-ext. Remove nginx mods lua and lua-upstream (due to regression over the last couple of years)." }
   - { date: "08.09.20:", desc: "Add php7-xsl." }
   - { date: "01.06.20:", desc: "Rebasing to alpine 3.12." }
   - { date: "18.04.20:", desc: "Fix unwanted shutdown of the container." }
diff --git a/root/etc/cont-init.d/40-config b/root/etc/cont-init.d/40-config
index 1d1473e..2a7ea15 100644
--- a/root/etc/cont-init.d/40-config
+++ b/root/etc/cont-init.d/40-config
@@ -4,6 +4,12 @@
 mkdir -p \
 	/config/geoip2db
 
+# remove lua bits from nginx.conf if not done before
+if ! grep -q '#Removed lua' /config/nginx/nginx.conf; then 
+  echo "Removing lua specific info from nginx.conf"
+  sed -i 's|\tlua_load_resty_core off;|\t#Removed lua. Do not remove this comment|g' /config/nginx/nginx.conf
+fi
+
 # create GeoIP2 folder symlink
 [[ -d /var/lib/libmaxminddb ]] && [[ ! -L /var/lib/libmaxminddb ]] && \
   rm -rf /var/lib/libmaxminddb