diff --git a/README.md b/README.md
index 9be4b75..99f6108 100644
--- a/README.md
+++ b/README.md
@@ -504,6 +504,14 @@ Context : *global*, *multisite*
 Only valid when `USE_REVERSE_PROXY` is set to *yes*. Set it to *yes* when the corresponding `REVERSE_PROXY_HOST` is a WebSocket server.  
 You can set multiple url/host by adding a suffix number to the variable name like this : `REVERSE_PROXY_WS_1`, `REVERSE_PROXY_WS_2`, `REVERSE_PROXY_WS_3`, ...
 
+`REVERSE_PROXY_HEADERS`  
+Values : *\<list of custom headers separated with a semicolon\>* 
+Examples : Access-Control-Allow-Origin 'https://mydomain.dev'; Custom_Api_Header 'test';
+Default value : ""  
+Context : *global*, *multisite*  
+Only valid when `USE_REVERSE_PROXY` is set to *yes*. Set it to *yes* when the corresponding `REVERSE_PROXY_HOST` is a WebSocket server.  
+You can set multiple url/host by adding a suffix number to the variable name like this : `REVERSE_PROXY_HEADERS_1`, `REVERSE_PROXY_HEADERS_2`, `REVERSE_PROXY_HEADERS_3`, ...
+
 `PROXY_REAL_IP`  
 Values : *yes* | *no*  
 Default value : *no*  
diff --git a/confs/site/reverse-proxy.conf b/confs/site/reverse-proxy.conf
index 89cbc6e..1fb489b 100644
--- a/confs/site/reverse-proxy.conf
+++ b/confs/site/reverse-proxy.conf
@@ -2,4 +2,5 @@ location %REVERSE_PROXY_URL% {
 	proxy_pass %REVERSE_PROXY_HOST%;
 	%REVERSE_PROXY_HEADERS%
 	%REVERSE_PROXY_WS%
+	%REVERSE_PROXY_CUSTOM_HEADERS%
 }
diff --git a/entrypoint/site-config.sh b/entrypoint/site-config.sh
index a0f078c..43e8809 100644
--- a/entrypoint/site-config.sh
+++ b/entrypoint/site-config.sh
@@ -68,11 +68,19 @@ if [ "$USE_REVERSE_PROXY" = "yes" ] ; then
 			value=$(echo "$var" | sed "s/${name}=//")
 			host=$(echo "$name" | sed "s/URL/HOST/")
 			host_value=$(env | grep "^${host}=" | sed "s/${host}=//")
+			custom_headers=$(echo "$name" | sed "s/URL/HEADERS/")
+			custom_headers_value=$(env | grep "^${host}=" | sed "s/${host}=//")
 			ws=$(echo "$name" | sed "s/URL/WS/")
 			ws_value=$(env | grep "^${ws}=" | sed "s/${ws}=//")
 			cp "${NGINX_PREFIX}reverse-proxy.conf" "${NGINX_PREFIX}reverse-proxy-${i}.conf"
 			replace_in_file "${NGINX_PREFIX}reverse-proxy-${i}.conf" "%REVERSE_PROXY_URL%" "$value"
 			replace_in_file "${NGINX_PREFIX}reverse-proxy-${i}.conf" "%REVERSE_PROXY_HOST%" "$host_value"
+			if [ "$custom_headers_value" != "" ] ; then
+			  IFS=';' ;for header_value in $(echo "$custom_headers_value") ; do
+			    replace_in_file "${NGINX_PREFIX}reverse-proxy-${i}.conf" "%REVERSE_PROXY_CUSTOM_HEADERS%" "more_set_headers $header_value;\n%REVERSE_PROXY_CUSTOM_HEADERS%"
+			  done
+			  replace_in_file "${NGINX_PREFIX}reverse-proxy-${i}.conf" "%REVERSE_PROXY_CUSTOM_HEADERS%" ""
+			fi
 			replace_in_file "${NGINX_PREFIX}reverse-proxy-${i}.conf" "%REVERSE_PROXY_HEADERS%" "include ${NGINX_PREFIX}reverse-proxy-headers.conf;"
 			if [ "$ws_value" = "yes" ] ; then
 				replace_in_file "${NGINX_PREFIX}reverse-proxy-${i}.conf" "%REVERSE_PROXY_WS%" "proxy_http_version 1.1;\nproxy_set_header Upgrade \$http_upgrade;\nproxy_set_header Connection \"Upgrade\";\n"