diff --git a/mantisbt/Dockerfile b/mantisbt/Dockerfile
index 40e69c0..c8dcdc6 100644
--- a/mantisbt/Dockerfile
+++ b/mantisbt/Dockerfile
@@ -10,7 +10,8 @@ RUN a2enmod rewrite
 RUN apt-get update && apt-get install -y libpng12-dev libjpeg-dev libpq-dev \
         && rm -rf /var/lib/apt/lists/* \
         && docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr \
-        && docker-php-ext-install gd mysqli mbstring
+        && docker-php-ext-install gd mysqli mbstring \
+        && docker-php-ext-configure mysqli
 
 WORKDIR /var/www/html