diff --git a/php-worker/Dockerfile b/php-worker/Dockerfile
index 350c40d..e72f51a 100644
--- a/php-worker/Dockerfile
+++ b/php-worker/Dockerfile
@@ -101,7 +101,11 @@ RUN if [ ${INSTALL_AMQP} = true ]; then \
 ARG INSTALL_GEARMAN=false
 
 RUN if [ ${INSTALL_GEARMAN} = true ]; then \
-    docker-php-ext-install gearman \
+    sed -i "\$ahttp://dl-cdn.alpinelinux.org/alpine/edge/main" /etc/apk/repositories && \
+    sed -i "\$ahttp://dl-cdn.alpinelinux.org/alpine/edge/community" /etc/apk/repositories && \
+    sed -i "\$ahttp://dl-cdn.alpinelinux.org/alpine/edge/testing" /etc/apk/repositories && \
+    apk --update add php7-gearman && \
+    sh -c 'echo "extension=/usr/lib/php7/modules/gearman.so" > /usr/local/etc/php/conf.d/gearman.ini' \
 ;fi
 
 # Install Cassandra drivers: