diff --git a/.drone.yml b/.drone.yml
new file mode 100644
index 0000000..a248aec
--- /dev/null
+++ b/.drone.yml
@@ -0,0 +1,164 @@
+pipeline:
+  gcc5:
+    image: debian:stretch-slim
+    pull: true
+    when:
+      event: [push, pull_request]
+    environment:
+      - LANG=C.utf8
+      - CXX=g++-5
+      - CXXFLAGS=-pipe -O2
+    commands:
+      - rm /etc/apt/apt.conf.d/docker-clean
+      - apt-get update -q
+      - echo "APT::Default-Release \"stretch\";" >> /etc/apt/apt.conf.d/00default_release
+      - echo "deb http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu xenial main" >> /etc/apt/sources.list.d/ubuntu-toolchain-r.list
+      - apt-get install -qy gnupg
+      - gpg --keyserver hkp://keyserver.ubuntu.com --recv-keys 0x60c317803a41ba51845e371a1e9377a2ba9ef27f
+      - gpg --armor --export 0x60c317803a41ba51845e371a1e9377a2ba9ef27f | apt-key add -
+      - apt-get update -q
+      - apt-get install -qy -t xenial g++-5
+      - apt-get install -qy cmake pkg-config
+      - apt-get install -qy libcrypto++-dev libmagick++-dev libxdg-basedir-dev
+      - rm -rf build && mkdir -p build && cd build
+      - cmake -DCMAKE_INSTALL_PREFIX=/usr ..
+      - make VERBOSE=1
+    volumes:
+      - /var/cache/debian-package-cache:/var/cache/apt/archives
+
+  gcc6:
+    image: debian:stretch-slim
+    pull: true
+    environment:
+      - LANG=C.utf8
+      - CXX=g++-6
+      - CXXFLAGS=-pipe -O2
+    commands:
+      - rm /etc/apt/apt.conf.d/docker-clean
+      - apt-get update -q
+      - apt-get install -qy g++-6 cmake pkg-config
+      - apt-get install -qy libcrypto++-dev libmagick++-dev libxdg-basedir-dev
+      - rm -rf build && mkdir -p build && cd build
+      - cmake -DCMAKE_INSTALL_PREFIX=/usr ..
+      - make VERBOSE=1
+    volumes:
+      - /var/cache/debian-package-cache:/var/cache/apt/archives
+
+  gcc7:
+    image: debian:stretch-slim
+    pull: true
+    when:
+      event: [push, pull_request]
+    environment:
+      - LANG=C.utf8
+      - CXX=g++-7
+      - CXXFLAGS=-pipe -O2
+    commands:
+      - rm /etc/apt/apt.conf.d/docker-clean
+      - apt-get update -q
+      - echo "APT::Default-Release \"stretch\";" >> /etc/apt/apt.conf.d/00default_release
+      - echo "deb http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu xenial main" >> /etc/apt/sources.list.d/ubuntu-toolchain-r.list
+      - apt-get install -qy gnupg
+      - gpg --keyserver hkp://keyserver.ubuntu.com --recv-keys 0x60c317803a41ba51845e371a1e9377a2ba9ef27f
+      - gpg --armor --export 0x60c317803a41ba51845e371a1e9377a2ba9ef27f | apt-key add -
+      - apt-get update -q
+      - apt-get install -qy -t xenial g++-7
+      - apt-get install -qy cmake pkg-config
+      - apt-get install -qy libcrypto++-dev libmagick++-dev libxdg-basedir-dev
+      - rm -rf build && mkdir -p build && cd build
+      - cmake -DCMAKE_INSTALL_PREFIX=/usr ..
+      - make VERBOSE=1
+    volumes:
+      - /var/cache/debian-package-cache:/var/cache/apt/archives
+
+  gcc8:
+    image: debian:stretch-slim
+    pull: true
+    when:
+      event: [push, pull_request]
+    environment:
+      - LANG=C.utf8
+      - CXX=g++-8
+      - CXXFLAGS=-pipe -O2
+    commands:
+      - rm /etc/apt/apt.conf.d/docker-clean
+      - apt-get update -q
+      - echo "APT::Default-Release \"stretch\";" >> /etc/apt/apt.conf.d/00default_release
+      - echo "deb http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu xenial main" >> /etc/apt/sources.list.d/ubuntu-toolchain-r.list
+      - apt-get install -qy gnupg
+      - gpg --keyserver hkp://keyserver.ubuntu.com --recv-keys 0x60c317803a41ba51845e371a1e9377a2ba9ef27f
+      - gpg --armor --export 0x60c317803a41ba51845e371a1e9377a2ba9ef27f | apt-key add -
+      - apt-get update -q
+      - apt-get install -qy -t xenial g++-8
+      - apt-get install -qy cmake pkg-config
+      - apt-get install -qy libcrypto++-dev libmagick++-dev libxdg-basedir-dev
+      - rm -rf build && mkdir -p build && cd build
+      - cmake -DCMAKE_INSTALL_PREFIX=/usr ..
+      - make VERBOSE=1
+    volumes:
+      - /var/cache/debian-package-cache:/var/cache/apt/archives
+
+  clang5:
+    image: debian:stretch-slim
+    pull: true
+    when:
+      event: [push, pull_request]
+    environment:
+      - LANG=C.utf8
+      - CXX=clang++-5.0
+      - CXXFLAGS=-pipe -O2
+    commands:
+      - rm /etc/apt/apt.conf.d/docker-clean
+      - echo "APT::Default-Release \"stretch\";" >> /etc/apt/apt.conf.d/00default_release
+      - echo "deb http://deb.debian.org/debian stretch-backports main" >> /etc/apt/sources.list.d/stretch.list
+      - apt-get update -q
+      - apt-get install -qy -t stretch-backports clang-5.0
+      - apt-get install -qy cmake pkg-config
+      - apt-get install -qy libcrypto++-dev libmagick++-dev libxdg-basedir-dev
+      - rm -rf build && mkdir -p build && cd build
+      - cmake -DCMAKE_INSTALL_PREFIX=/usr ..
+      - make VERBOSE=1
+    volumes:
+      - /var/cache/debian-package-cache:/var/cache/apt/archives
+
+  clang6:
+    image: debian:stretch-slim
+    pull: true
+    when:
+      event: [push, pull_request]
+    environment:
+      - LANG=C.utf8
+      - CXX=clang++-6.0
+      - CXXFLAGS=-pipe -O2
+    commands:
+      - rm /etc/apt/apt.conf.d/docker-clean
+      - echo "APT::Default-Release \"stretch\";" >> /etc/apt/apt.conf.d/00default_release
+      - echo "deb http://deb.debian.org/debian stretch-backports main" >> /etc/apt/sources.list.d/stretch.list
+      - apt-get update -q
+      - apt-get install -qy -t stretch-backports clang-6.0
+      - apt-get install -qy cmake pkg-config
+      - apt-get install -qy libcrypto++-dev libmagick++-dev libxdg-basedir-dev
+      - rm -rf build && mkdir -p build && cd build
+      - cmake -DCMAKE_INSTALL_PREFIX=/usr ..
+      - make VERBOSE=1
+    volumes:
+      - /var/cache/debian-package-cache:/var/cache/apt/archives
+
+  gitea_release:
+    image: plugins/gitea-release
+    pull: true
+    when:
+      event: tag
+    base_url: https://schlomp.space
+    secrets: [ gitea_token ]
+    title: ${DRONE_TAG}
+    prerelease: true
+
+  notify:
+    image: drillster/drone-email
+    pull: true
+    host: cryptoparty-celle.de
+    secrets: [ email_username, email_password ]
+    from: drone@tzend.de
+    when:
+      status: [ changed, failure ]
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 20b598e..2ab24dc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,11 @@ project(libravatarserv
 include(GNUInstallDirs)
 find_package(PkgConfig REQUIRED)
 pkg_check_modules(MAGICPP REQUIRED Magick++)
-pkg_check_modules(LIBCRYPTOPP REQUIRED libcryptopp)
+pkg_check_modules(LIBCRYPTOPP libcryptopp)
+if(NOT LIBCRYPTOPP_FOUND)
+    # Debian stretch package installs libcrypto++.pc
+    pkg_check_modules(LIBCRYPTOPP REQUIRED libcrypto++)
+endif()
 pkg_check_modules(LIBXDG_BASEDIR REQUIRED libxdg-basedir)
 
 set(CMAKE_CXX_STANDARD 14)
diff --git a/README.md b/README.md
index 82068aa..6ddc4dc 100644
--- a/README.md
+++ b/README.md
@@ -63,8 +63,8 @@ The avatar directory could look like this:
 
 ### Dependencies
 
-* C++ compiler (tested: [gcc](https://gcc.gnu.org/) 7,
-  [clang](https://llvm.org/) 6)
+* C++ compiler (tested: [gcc](https://gcc.gnu.org/) 5/6/7/8,
+  [clang](https://llvm.org/) 5/6)
 * [cmake](https://cmake.org/) (at least 3.2)
 * [crypto++](https://cryptopp.com) (tested: 7.0)
 * [imagemagick](https://www.imagemagick.org/) (tested: 7.0)