diff --git a/deploy/Dockerfile b/deploy/Dockerfile
index e60ce43..b6c0022 100644
--- a/deploy/Dockerfile
+++ b/deploy/Dockerfile
@@ -12,6 +12,7 @@ RUN install-php-extensions \
     redis \
     mongodb \
     pcntl \
+    gmp \
     zip
 
 COPY . /app