diff --git a/Dockerfile b/Dockerfile
index 0c22870..0a743ba 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,4 +9,5 @@ RUN apt update \
     && mv "$PHP_INI_DIR/php.ini-production" "$PHP_INI_DIR/php.ini" \
     && docker-php-ext-install -j$(nproc) opcache \
     && apt purge -y wget \
+    && apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 78BD65473CB3BD13 \
     && rm -rf /var/lib/apt/lists/*