diff --git a/workspace/Dockerfile-56 b/workspace/Dockerfile-56
index 9b05eae7..8e69967f 100644
--- a/workspace/Dockerfile-56
+++ b/workspace/Dockerfile-56
@@ -62,8 +62,7 @@ RUN if [ ${INSTALL_SOAP} = true ]; then \
   # Install the PHP SOAP extension
   apt-get -y update && \
   add-apt-repository -y ppa:ondrej/php && \
-  apt-get -y install libxml2-dev php5.6-soap && \
-  echo "extension=soap.so" >> /etc/php/5.6/cli/conf.d/40-soap.ini \
+  apt-get -y install libxml2-dev php5.6-soap \
 ;fi
 
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