diff --git a/dockerfile b/dockerfile
index 87d9e59..3a5d51b 100644
--- a/dockerfile
+++ b/dockerfile
@@ -10,21 +10,21 @@ ENV DEBIAN_FRONTEND=noninteractive
 #──────────────────────────────────────────────────────────────
 # Install ALL necessary packages in a single run for minimal image size
 #──────────────────────────────────────────────────────────────
-RUN apt-get update && apt-get install -y --no-install-recommends gnupg lsb-release ca-certificates apt-transport-https software-properties-common wget \
-    # Add the repository for older PHP versions
-    && wget -O /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg \
-    && echo "deb https://packages.sury.org/php/ $(lsb_release -sc) main" > /etc/apt/sources.list.d/php.list \
-    # Update again to fetch packages from the new repository
-    && apt-get update \
-    # Install all packages, specifying PHP 8.1
-    && apt-get install -y --no-install-recommends \
-        apt-utils \
-        slapd ldap-utils gnutls-bin ssl-cert schema2ldif vim mc \
-        apache2 \
-        php8.1 libapache2-mod-php8.1 \
-        php8.1-ldap php8.1-mbstring php8.1-xml php8.1-curl php8.1-intl \
-    # Clean up APT caches to reduce image size
-    && apt-get clean && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y --no-install-recommends gnupg lsb-release ca-certificates apt-transport-https software-properties-common wget curl \
+# Add the Ondřej Surý PHP repository (modern Debian way)
+&& wget -qO- https://packages.sury.org/php/apt.gpg | gpg --dearmor -o /usr/share/keyrings/sury-php-archive-keyring.gpg \
+&& echo "deb [signed-by=/usr/share/keyrings/sury-php-archive-keyring.gpg] https://packages.sury.org/php/ $(lsb_release -sc) main" > /etc/apt/sources.list.d/php.list \
+# Update package lists again to include the new PHP repo
+&& apt-get update \
+# Install all required packages, using PHP 8.1 from the Surý repo
+&& apt-get install -y --no-install-recommends \
+apt-utils \
+slapd ldap-utils gnutls-bin ssl-cert schema2ldif vim mc \
+apache2 \
+php8.1 libapache2-mod-php8.1 \
+php8.1-ldap php8.1-mbstring php8.1-xml php8.1-curl php8.1-intl \
+# Clean up APT caches to keep the image small
+&& apt-get clean && rm -rf /var/lib/apt/lists/*
 
 # Enable required Apache modules
 RUN a2enmod rewrite headers ssl