diff --git a/Dockerfile b/Dockerfile
index 30f0138..0ebc104 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -10,5 +10,5 @@ RUN apt-get -y update \
     && apt-get -y install libvips-dev \
     && pecl install vips \
     && echo 'extension="vips.so"' > /usr/local/etc/php/conf.d/20-vips.ini
+RUN echo 'ffi.enable = "true"' >> /usr/local/etc/php/conf.d/20-vips.ini
 
-COPY ./php.ini /usr/local/etc/php/php-vips.ini
diff --git a/php.ini b/php.ini
deleted file mode 100644
index bc849bf..0000000
--- a/php.ini
+++ /dev/null
@@ -1 +0,0 @@
-ffi.enable = "true"