diff --git a/Dockerfile b/Dockerfile
index 780fb1a..0fd7929 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -15,7 +15,7 @@ RUN apt-get update && apt-get install -y \
     zip \
     && docker-php-ext-configure gd --with-freetype --with-jpeg \
     && docker-php-ext-install intl zip pdo pdo_mysql mbstring gd \
-    && apt-get clean
+    && apt-get clean && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /var/www/html