diff --git a/docker/Dockerfile.base-ubuntu-18.04 b/docker/Dockerfile.base-ubuntu-18.04
index acc2a0b..2926149 100644
--- a/docker/Dockerfile.base-ubuntu-18.04
+++ b/docker/Dockerfile.base-ubuntu-18.04
@@ -9,8 +9,8 @@ ENV PATH=${GRADLE_HOME}/bin:${PATH}
 COPY ./server/website/requirements.txt /
 
 RUN apt-get update \
-    && apt-get install -y python3.6 python3-pip mysql-client \
-        libmysqlclient-dev python-mysqldb postgresql-client \
+    && apt-get install -y python3.6 python3-pip libssl-dev \
+        mysql-client libmysqlclient-dev python-mysqldb postgresql-client \
         openjdk-11-jdk checkstyle git unzip wget curl \
     && wget https://services.gradle.org/distributions/${GRADLE_VERSION}-bin.zip \
     && unzip ${GRADLE_VERSION}-bin.zip -d /opt \