diff --git a/Dockerfile b/Dockerfile
index 55566cabca20fefdde518afaf72d34bbff8ad59d..1476b3acc0e6a3aaa14dddb5aee9744b0fa96f86 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:buster-slim
+FROM debian:bullseye-slim
 
 MAINTAINER Mathieu Ruellan <mathieu.ruellan@gmail.com>
 
@@ -38,11 +38,11 @@ RUN wget -q -O piwigo.zip http://piwigo.org/download/dlcounter.php?code=$PIWIGO_
     mv /var/www/local /template/ && \
     mkdir -p /var/www/_data/i /config && \
     chown -R www-data:www-data /var/www &&\
-    sed -i "s/max_execution_time = 30/max_execution_time = 300/" /etc/php/7.3/apache2/php.ini &&\
-    sed -i "s/memory_limit = 128M/memory_limit = 512M/" /etc/php/7.3/apache2/php.ini &&\
-    sed -i "s/max_input_time = 60/max_input_time = 180/" /etc/php/7.3/apache2/php.ini &&\
-    sed -i "s/post_max_size = 8M/post_max_size = 100M/" /etc/php/7.3/apache2/php.ini &&\
-    sed -i "s/upload_max_filesize = 2M/upload_max_filesize = 100M/" /etc/php/7.3/apache2/php.ini
+    sed -i "s/max_execution_time = 30/max_execution_time = 300/" /etc/php/7.4/apache2/php.ini &&\
+    sed -i "s/memory_limit = 128M/memory_limit = 512M/" /etc/php/7.4/apache2/php.ini &&\
+    sed -i "s/max_input_time = 60/max_input_time = 180/" /etc/php/7.4/apache2/php.ini &&\
+    sed -i "s/post_max_size = 8M/post_max_size = 100M/" /etc/php/7.4/apache2/php.ini &&\
+    sed -i "s/upload_max_filesize = 2M/upload_max_filesize = 100M/" /etc/php/7.4/apache2/php.ini
 
 VOLUME ["/var/www/galleries", "/var/www/themes", "/var/www/plugins", "/var/www/local", "/var/www/_data/i", "/config"]