diff --git a/Dockerfile b/Dockerfile
index a59d167..d0bf287 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,8 @@ WORKDIR /
 
 # Install composer
 RUN apt-get -y update && apt-get install -y --no-install-recommends git zip
-RUN curl --silent --show-error https://getcomposer.org/installer | php  
+RUN curl --silent --show-error https://getcomposer.org/installer | php && \
+    chmod +x composer.phar && mv composer.phar /usr/local/bin/composer
 
 # Install extensions
 ADD add_extension.sh /add_extension.sh