diff --git a/circle.yml b/circle.yml
index 73fa1cac4..a30789fd4 100644
--- a/circle.yml
+++ b/circle.yml
@@ -1,14 +1,14 @@
 machine:
   php:
-    version: 5.6.17
+    version: 5.6.14
   services:
       - redis
       - docker
 dependencies:
   pre:
     - yes '' | pecl install -f apcu-4.0.10
-    - echo "extension=apcu.so" | sudo tee -a /opt/circleci/php/$(phpenv global)/etc/php.ini
-    - echo "apc.enable_cli = 1" | sudo tee -a /opt/circleci/php/$(phpenv global)/etc/php.ini
+    - echo "extension=apcu.so" >> $(php-config --prefix)/etc/conf.d/apcu.ini
+    - echo "apc.enable_cli = 1" >> $(php-config --prefix)/etc/conf.d/apcu.ini
     - docker pull php
     - docker pull nyanpass/php5.5
 
@@ -27,4 +27,4 @@ test:
     - docker run -it -v `pwd`:/php-client php:7.1-alpine sh -c "curl -s https://getcomposer.org/installer | php && cd /php-client && /composer.phar update --prefer-lowest && vendor/bin/phpunit"
 
     - docker run -it -v `pwd`:/php-client nyanpass/php5.5:5.5-alpine sh -c "curl -s https://getcomposer.org/installer | php && cd /php-client && /composer.phar update && vendor/bin/phpunit"
-    - docker run -it -v `pwd`:/php-client nyanpass/php5.5:5.5-alpine sh -c "curl -s https://getcomposer.org/installer | php && cd /php-client && /composer.phar update --prefer-lowest && vendor/bin/phpunit"
\ No newline at end of file
+    - docker run -it -v `pwd`:/php-client nyanpass/php5.5:5.5-alpine sh -c "curl -s https://getcomposer.org/installer | php && cd /php-client && /composer.phar update --prefer-lowest && vendor/bin/phpunit"