diff --git a/Dockerfile b/Dockerfile
index be99eee..f12f3a1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,7 +6,7 @@ LABEL maintainer="LanCache.Net Team <team@lancache.net>"
 ENV GENERICCACHE_VERSION=2 \
     CACHE_MODE=monolithic \
     WEBUSER=www-data \
-    CACHE_MEM_SIZE=500m \
+    CACHE_INDEX_SIZE=500m \
     CACHE_DISK_SIZE=1000000m \
     CACHE_MAX_AGE=3560d \
     CACHE_SLICE_SIZE=1m \
diff --git a/overlay/etc/nginx/conf.d/20_proxy_cache_path.conf b/overlay/etc/nginx/conf.d/20_proxy_cache_path.conf
index 8b43a8f..d66bdfa 100644
--- a/overlay/etc/nginx/conf.d/20_proxy_cache_path.conf
+++ b/overlay/etc/nginx/conf.d/20_proxy_cache_path.conf
@@ -1 +1 @@
-proxy_cache_path /data/cache/cache levels=2:2 keys_zone=generic:CACHE_MEM_SIZE inactive=200d max_size=CACHE_DISK_SIZE loader_files=1000 loader_sleep=50ms loader_threshold=300ms use_temp_path=off;
+proxy_cache_path /data/cache/cache levels=2:2 keys_zone=generic:CACHE_INDEX_SIZE inactive=200d max_size=CACHE_DISK_SIZE loader_files=1000 loader_sleep=50ms loader_threshold=300ms use_temp_path=off;
diff --git a/overlay/hooks/entrypoint-pre.d/00_deprecation.sh b/overlay/hooks/entrypoint-pre.d/00_deprecation.sh
index 7ec1347..0587cfa 100644
--- a/overlay/hooks/entrypoint-pre.d/00_deprecation.sh
+++ b/overlay/hooks/entrypoint-pre.d/00_deprecation.sh
@@ -7,3 +7,9 @@ if [[ ! -z "${CACHE_DOMAIN_REPO}" ]]; then
 
 fi
 
+if [[ ! -z "${CACHE_INDEX_SIZE}" ]]; then
+	echo " *** CACHE_MEM_SIZE has been deprecated in place of CACHE_INDEX_SIZE"
+	echo " *** Using CACHE_MEM_SIZE as the value"
+	echo " *** Please update your configuration at your earliest convenience"
+	CACHE_INDEX_SIZE=$CACHE_MEM_SIZE
+fi
\ No newline at end of file
diff --git a/overlay/hooks/entrypoint-pre.d/10_setup.sh b/overlay/hooks/entrypoint-pre.d/10_setup.sh
index 4b112e5..404ca6a 100644
--- a/overlay/hooks/entrypoint-pre.d/10_setup.sh
+++ b/overlay/hooks/entrypoint-pre.d/10_setup.sh
@@ -1,12 +1,17 @@
 #!/bin/sh
 set -e
 
+# Handle CACHE_MEM_SIZE deprecation
+if [[ ! -z "${CACHE_MEM_SIZE}" ]]; then
+    CACHE_INDEX_SIZE=${CACHE_MEM_SIZE}
+fi
+
 # Preprocess UPSTREAM_DNS to allow for multiple resolvers using the same syntax as lancache-dns
 UPSTREAM_DNS="$(echo -n "${UPSTREAM_DNS}" | sed 's/[;]/ /g')"
 
 echo "worker_processes ${NGINX_WORKER_PROCESSES};" > /etc/nginx/workers.conf
 sed -i "s/^user .*/user ${WEBUSER};/" /etc/nginx/nginx.conf
-sed -i "s/CACHE_MEM_SIZE/${CACHE_MEM_SIZE}/"  /etc/nginx/conf.d/20_proxy_cache_path.conf
+sed -i "s/CACHE_INDEX_SIZE/${CACHE_INDEX_SIZE}/"  /etc/nginx/conf.d/20_proxy_cache_path.conf
 sed -i "s/CACHE_DISK_SIZE/${CACHE_DISK_SIZE}/" /etc/nginx/conf.d/20_proxy_cache_path.conf
 sed -i "s/CACHE_MAX_AGE/${CACHE_MAX_AGE}/"    /etc/nginx/sites-available/cache.conf.d/root/20_cache.conf
 sed -i "s/slice 1m;/slice ${CACHE_SLICE_SIZE};/" /etc/nginx/sites-available/cache.conf.d/root/20_cache.conf