diff --git a/.travis.yml b/.travis.yml
index 8aaae128..9b27ab61 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,7 @@
 sudo: enabled
 
 
-dist: trusty
+dist: xenial
 
 branches:
   only:
@@ -15,6 +15,9 @@ os:
 compiler:
 - gcc
 
+services:
+  - docker
+
 before install:
 - sudo apt-get -qq update
 
@@ -25,6 +28,7 @@ env:
   - ARCH='armv7' ARCH_DIST='linux-armhf' MSSPI='yes' CONFIGURE_OPTIONS='--with-threads=pthread --enable-msspi' CSPMODE='kc1'
   - ARCH='aarch64' ARCH_DIST='linux-arm64' MSSPI='yes' CONFIGURE_OPTIONS='--with-threads=pthread --enable-msspi' CSPMODE='kc1'
   - ARCH='amd64' ARCH_DIST='linux-amd64' MSSPI='yes' CONFIGURE_OPTIONS='--with-threads=pthread --enable-msspi' CSPMODE='kc1'
+  - ARCH='amd64' ARCH_DIST='linux-amd64' BUILD_OS='centos' MSSPI='yes' CONFIGURE_OPTIONS='--with-threads=pthread --enable-msspi' CSPMODE='kc1'
   - ARCH='amd64' CONFIGURE_OPTIONS='--with-threads=pthread'
   - ARCH='amd64' CONFIGURE_OPTIONS='--with-threads=fork'
   - ARCH='amd64' CONFIGURE_OPTIONS='--with-threads=ucontext'
@@ -42,15 +46,24 @@ addons:
 
 install:
 - if [ "$MSSPI" = "yes" ]; then
+    if [ "$BUILD_OS" = "centos" ]; then
+      wget https://$ACCOUNT@update.cryptopro.ru/support/stunnel/dist/csp50/${ARCH_DIST}.tgz &&
+      tar -xvf ${ARCH_DIST}.tgz;
+    else
       wget https://$ACCOUNT@update.cryptopro.ru/support/stunnel/dist/csp50/${ARCH_DIST}_deb.tgz &&
       tar -xvf ${ARCH_DIST}_deb.tgz;
+    fi
   fi
 before_script:
   - if [ "$TRAVIS_OS_NAME" = "osx" ]; then brew update; brew install openssl autoconf-archive expect; fi; true
 
 script:
   - if [ "$ARCH" = "amd64" ]; then
-      bash -ex ./build_amd64.sh;
+      if [ "$BUILD_OS" = "centos" ]; then
+        bash -ex ./build_amd64_centos.sh;
+      else
+        bash -ex ./build_amd64.sh;
+      fi
     elif [ "$ARCH" = "armv7" ]; then
       bash -ex ./build_armv7.sh;
     elif [ "$ARCH" = "aarch64" ]; then
@@ -64,7 +77,7 @@ deploy:
     secure: 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
   skip_cleanup: true
   file:
-    - "src/${TRAVIS_TAG}_${ARCH_DIST}_deb.tar.gz"
+    - "src/${TRAVIS_TAG}_${ARCH_DIST}${BUILD_OS:+[_$BUILD_OS]}.tar.gz"
   on:
     tags: true
     condition: $MSSPI = "yes"
diff --git a/build_amd64.sh b/build_amd64.sh
index 18a132e3..a09a4118 100755
--- a/build_amd64.sh
+++ b/build_amd64.sh
@@ -2,6 +2,7 @@
 
 echo "export CPRO_SUFFIX=amd64" > envvars.sh
 chmod a+x envvars.sh
+. ./envvars.sh
 
 if [ "$MSSPI" = "yes" ]; then
     cd ./linux-amd64_deb
@@ -11,12 +12,8 @@ if [ "$MSSPI" = "yes" ]; then
     cd ../../.. ;
 fi
 
-. ./envvars.sh
-
 autoreconf -fvi && touch src/dhparam.c
-
 ./configure $CONFIGURE_OPTIONS || exit 1
-
 make || exit 1
 
 if [ -z "$MSSPI" ]; then 
@@ -27,7 +24,7 @@ else
         cd tests
         sudo perl test-stunnel-msspi.pl || exit 1
         cd ../src
-        tar -cvzf ${TRAVIS_TAG}_linux-amd64_deb.tar.gz stunnel-msspi
+        tar -cvzf ${TRAVIS_TAG}_linux-amd64.tar.gz stunnel-msspi
         cd ..;
     fi
 fi
diff --git a/build_amd64_centos.sh b/build_amd64_centos.sh
new file mode 100755
index 00000000..0287c509
--- /dev/null
+++ b/build_amd64_centos.sh
@@ -0,0 +1,57 @@
+#! /bin/bash
+
+DOCKER_REPO="fullincomedock/centos:centos6"
+DOCKER_VOLUME="/travis/stunnel"
+
+# Msspi and not-msspi build and test on centos6 in docker.
+if [ "$1" = "in_docker" ]; then
+
+    . /root/.bashrc
+    . ./envvars.sh
+
+    if [ "$MSSPI" = "yes" ]; then
+        cd ./linux-amd64
+        ./install.sh $CSPMODE || exit 1
+        cd ../src/msspi/build_linux
+        make || exit 1
+        cd ../../.. ;
+    fi
+
+    autoreconf -fvi && touch src/dhparam.c
+    LIBS=-lm ./configure $CONFIGURE_OPTIONS || exit 1
+    make || exit 1
+
+    if [ -z "$MSSPI" ]; then 
+        make test || ( for FILE in tests/logs/*.log; do echo "*** $FILE ***"; cat "$FILE"; done; false );
+    else
+        if [ "$MSSPI" = "yes" ]; then
+            mv ./src/stunnel ./src/stunnel-msspi
+            cd tests
+            sudo perl test-stunnel-msspi.pl || exit 1
+            cd ../src
+            tar -cvzf ${TRAVIS_TAG}_linux-amd64${BUILD_OS:+[_$BUILD_OS]}.tar.gz stunnel-msspi
+            cd ..;
+        fi
+    fi
+
+else
+    echo 'DOCKER_OPTS="-H tcp://127.0.0.1:2375 -H unix:///var/run/docker.sock -s devicemapper"' | sudo tee /etc/default/docker > /dev/null
+    sudo service docker restart
+    sleep 5
+
+    echo "export BUILD_OS='${BUILD_OS}'" > envvars.sh
+    echo "export CONFIGURE_OPTIONS='${CONFIGURE_OPTIONS}'" >> envvars.sh
+    echo "export CSPMODE='${CSPMODE}'" >> envvars.sh
+    echo "export MSSPI='${MSSPI}'" >> envvars.sh
+    echo "export CPRO_SUFFIX='amd64'" >> envvars.sh
+    chmod a+x envvars.sh
+
+    sudo docker pull ${DOCKER_REPO}
+    sudo docker run \
+        --rm=true \
+        --user=root \
+        -v `pwd`:${DOCKER_VOLUME}:rw \
+        -w ${DOCKER_VOLUME} \
+        ${DOCKER_REPO} \
+        /bin/bash -c "bash -xe ${DOCKER_VOLUME}/build_amd64_centos.sh in_docker" || exit 1
+fi
diff --git a/build_arm64.sh b/build_arm64.sh
index e3ed2dff..b33d13c4 100755
--- a/build_arm64.sh
+++ b/build_arm64.sh
@@ -142,7 +142,7 @@ else
             cd tests
             perl test-stunnel-msspi.pl || exit 1
             cd ../src
-            tar -cvzf ${TRAVIS_TAG}_linux-arm64_deb.tar.gz stunnel-msspi
+            tar -cvzf ${TRAVIS_TAG}_linux-arm64.tar.gz stunnel-msspi
             cd ..;
         fi
     fi
@@ -150,4 +150,4 @@ else
     exit 0
 fi
 
-mv ${CHROOT_DIR}${TRAVIS_BUILD_DIR}/src/${TRAVIS_TAG}_linux-arm64_deb.tar.gz ./src/
+mv ${CHROOT_DIR}${TRAVIS_BUILD_DIR}/src/${TRAVIS_TAG}_linux-arm64.tar.gz ./src/
diff --git a/build_armv7.sh b/build_armv7.sh
index 0bff3dc0..4ca6d345 100755
--- a/build_armv7.sh
+++ b/build_armv7.sh
@@ -136,7 +136,7 @@ else
             cd tests
             perl test-stunnel-msspi.pl || exit 1
             cd ../src
-            tar -cvzf ${TRAVIS_TAG}_linux-armhf_deb.tar.gz stunnel-msspi
+            tar -cvzf ${TRAVIS_TAG}_linux-armhf.tar.gz stunnel-msspi
             cd ..;
         fi
     fi
@@ -144,4 +144,4 @@ else
     exit 0
 fi
 
-mv ${CHROOT_DIR}${TRAVIS_BUILD_DIR}/src/${TRAVIS_TAG}_linux-armhf_deb.tar.gz ./src/
+mv ${CHROOT_DIR}${TRAVIS_BUILD_DIR}/src/${TRAVIS_TAG}_linux-armhf.tar.gz ./src/