diff --git a/.travis.yml b/.travis.yml
index 673bc0a..2734f06 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,9 @@
-dist: xenial
+dist: bionic
+
+language: python
+
+python:
+  - "3.7"
 
 branches:
   only:
diff --git a/Dockerfile b/Dockerfile
index 7ebcc5a..38f62b4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,13 +9,18 @@ COPY requirements.txt .
 RUN \
   export ACCEPT_EULA='Y' && \
   export MYSQL_CONNECTOR='mysql-connector-odbc-8.0.18-linux-glibc2.12-x86-64bit' && \
+  export MYSQL_CONNECTOR_CHECKSUM='f2684bb246db22f2c9c440c4d905dde9' && \
   apt-get update && \
   apt-get install -y curl build-essential unixodbc-dev g++ apt-transport-https && \
+  gpg --keyserver hkp://keys.gnupg.net --recv-keys 5072E1F5 && \
   #
   # Install pyodbc db drivers for MSSQL, PG and MySQL
   curl https://packages.microsoft.com/keys/microsoft.asc | apt-key add - && \
   curl https://packages.microsoft.com/config/debian/9/prod.list > /etc/apt/sources.list.d/mssql-release.list && \
   curl -L -o ${MYSQL_CONNECTOR}.tar.gz https://dev.mysql.com/get/Downloads/Connector-ODBC/8.0/${MYSQL_CONNECTOR}.tar.gz && \
+  curl -L -o ${MYSQL_CONNECTOR}.tar.gz.asc https://downloads.mysql.com/archives/gpg/\?file\=${MYSQL_CONNECTOR}.tar.gz\&p\=10 && \
+  gpg --verify ${MYSQL_CONNECTOR}.tar.gz.asc && \
+  echo "${MYSQL_CONNECTOR_CHECKSUM} ${MYSQL_CONNECTOR}.tar.gz" | md5sum -c - && \
   apt-get update && \
   gunzip ${MYSQL_CONNECTOR}.tar.gz && tar xvf ${MYSQL_CONNECTOR}.tar && \
   cp ${MYSQL_CONNECTOR}/bin/* /usr/local/bin && cp ${MYSQL_CONNECTOR}/lib/* /usr/local/lib && \