diff --git a/nginx/weko-ams-restricted.conf b/nginx/weko-ams-restricted.conf
index 9d97dc33a2..e48541c8b6 100644
--- a/nginx/weko-ams-restricted.conf
+++ b/nginx/weko-ams-restricted.conf
@@ -20,8 +20,7 @@ server {
 }
 
 server {
-	listen 443;
-	ssl on;
+	listen 443 ssl;
 	ssl_protocols TLSv1.3 TLSv1.2;
 	ssl_certificate /etc/nginx/server.crt;
 	ssl_certificate_key /etc/nginx/server.key;
@@ -453,7 +452,7 @@ server {
 
 	gzip on;
 	gzip_disable "msie6";
-	gzip_http_version 1.1;
+	gzip_http_version 1.0; # 前段のプロキシは既定で HTTP/1.0 で転送してくる
 	gzip_comp_level 5; # or anything between 4-6
 	gzip_min_length 100;
 	gzip_proxied any;
@@ -463,7 +462,6 @@ server {
 		application/json
 		application/ld+json
 		application/manifest+json
-		application/octet-stream
 		application/rss+xml
 		application/vnd.geo+json
 		application/vnd.ms-fontobject
@@ -479,7 +477,6 @@ server {
 		image/x-icon
 		text/cache-manifest
 		text/css
-		text/html
 		text/javascript
 		text/plain
 		text/vcard
diff --git a/nginx/weko-ams.conf b/nginx/weko-ams.conf
index c5b37d07f8..f43fb66ca2 100644
--- a/nginx/weko-ams.conf
+++ b/nginx/weko-ams.conf
@@ -20,8 +20,7 @@ server {
 }
 
 server {
-	listen 443;
-	ssl on;
+	listen 443 ssl;
 	ssl_protocols TLSv1.3 TLSv1.2;
 	ssl_certificate /etc/nginx/server.crt;
 	ssl_certificate_key /etc/nginx/server.key;
@@ -402,7 +401,7 @@ server {
 
 	gzip on;
 	gzip_disable "msie6";
-	gzip_http_version 1.1;
+	gzip_http_version 1.0; # 前段のプロキシは既定で HTTP/1.0 で転送してくる
 	gzip_comp_level 5; # or anything between 4-6
 	gzip_min_length 100;
 	gzip_proxied any;
@@ -412,7 +411,6 @@ server {
 		application/json
 		application/ld+json
 		application/manifest+json
-		application/octet-stream
 		application/rss+xml
 		application/vnd.geo+json
 		application/vnd.ms-fontobject
@@ -428,7 +426,6 @@ server {
 		image/x-icon
 		text/cache-manifest
 		text/css
-		text/html
 		text/javascript
 		text/plain
 		text/vcard
diff --git a/nginx/weko.conf b/nginx/weko.conf
index 907134dcf2..de118b96e6 100644
--- a/nginx/weko.conf
+++ b/nginx/weko.conf
@@ -17,8 +17,7 @@ server {
 }
 
 server {
-	listen 443;
-	ssl on;
+	listen 443 ssl;
 	ssl_protocols TLSv1.3 TLSv1.2;
 	ssl_certificate /etc/nginx/server.crt;
 	ssl_certificate_key /etc/nginx/server.key;
@@ -423,7 +422,7 @@ server {
 
 	gzip on;
 	gzip_disable "msie6";
-	gzip_http_version 1.1;
+	gzip_http_version 1.0; # 前段のプロキシは既定で HTTP/1.0 で転送してくる
 	gzip_comp_level 5; # or anything between 4-6
 	gzip_min_length 100;
 	gzip_proxied any;
@@ -433,7 +432,6 @@ server {
 		application/json
 		application/ld+json
 		application/manifest+json
-		application/octet-stream
 		application/rss+xml
 		application/vnd.geo+json
 		application/vnd.ms-fontobject
@@ -449,7 +447,6 @@ server {
 		image/x-icon
 		text/cache-manifest
 		text/css
-		text/html
 		text/javascript
 		text/plain
 		text/vcard