diff --git a/.travis.yml b/.travis.yml
index b044b01..d216122 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,6 +14,18 @@ matrix:
         - cmake -DCMAKE_CXX_COMPILER=$CXX -DCMAKE_C_COMPILER=$CC ..
         - make VERBOSE=1
         - ctest --output-on-failure
+    - name: 'openssl-cmake_old'
+      os: linux
+      compiler: clang
+      before_script:
+        - source ./.travis/install_cmake_old.sh
+        - source ./.travis/install_openssl.sh
+      script:
+        - install -d build
+        - cd build
+        - cmake -DCMAKE_CXX_COMPILER=$CXX -DCMAKE_C_COMPILER=$CC -DRUN_TEST=off -DCMAKE_INSTALL_LIBDIR=lib -DCMAKE_INSTALL_BINDIR=bin ..
+        - make VERBOSE=1
+        - ctest --output-on-failure
     - name: 'boringssl'
       os: linux
       compiler: clang
@@ -28,3 +40,17 @@ matrix:
         - cmake -DCMAKE_CXX_COMPILER=$CXX -DCMAKE_C_COMPILER=$CC -DSXG_BUILD_SHARED=off -DSXG_BUILD_STATIC=on -DRUN_TEST=on -DSXG_WITH_CERT_CHAIN=off -DOPENSSL_CRYPTO_LIBRARY=${BORINGSSL_ROOT}/build/crypto/libcrypto.a -DOPENSSL_ROOT_DIR=${BORINGSSL_ROOT} -DOPENSSL_INCLUDE_DIR=${BORINGSSL_ROOT}/include ..
         - make VERBOSE=1
         - ctest --output-on-failure
+    - name: 'boringssl-cmake_old'
+      os: linux
+      compiler: clang
+      before_script:
+        - source ./.travis/install_cmake_old.sh
+        - source ./.travis/install_go.sh
+        - source ./.travis/install_boringssl.sh
+      script:
+        - go version
+        - install -d build
+        - cd build
+        - cmake -DCMAKE_CXX_COMPILER=$CXX -DCMAKE_C_COMPILER=$CC -DSXG_BUILD_SHARED=off -DSXG_BUILD_STATIC=on -DRUN_TEST=off -DSXG_WITH_CERT_CHAIN=off -DOPENSSL_CRYPTO_LIBRARY=${BORINGSSL_ROOT}/build/crypto/libcrypto.a -DOPENSSL_ROOT_DIR=${BORINGSSL_ROOT} -DOPENSSL_INCLUDE_DIR=${BORINGSSL_ROOT}/include -DCMAKE_INSTALL_LIBDIR=lib -DCMAKE_INSTALL_BINDIR=bin ..
+        - make VERBOSE=1
+        - ctest --output-on-failure
diff --git a/.travis/install_cmake.sh b/.travis/install_cmake.sh
index f93781b..6272d9a 100755
--- a/.travis/install_cmake.sh
+++ b/.travis/install_cmake.sh
@@ -4,10 +4,10 @@ DEPS_DIR="${TRAVIS_BUILD_DIR}/deps"
 mkdir ${DEPS_DIR} && pushd ${DEPS_DIR}
 CMAKE="cmake-3.15.2-Linux-x86_64"
 CMAKE_TAR="${CMAKE}.tar.gz"
-travis_retry wget --no-check-certificate https://github.com/Kitware/CMake/releases/download/v3.15.2/${CMAKE_TAR}
+travis_retry wget --no-check-certificate "https://github.com/Kitware/CMake/releases/download/v3.15.2/${CMAKE_TAR}"
 echo "bf433a0e0674cfb358b127e7120dccaa ${CMAKE_TAR}" > cmake_md5.txt
 md5sum -c cmake_md5.txt
-tar -xf ${CMAKE_TAR}
-mv ${CMAKE} cmake-install
-export PATH=${DEPS_DIR}/cmake-install:${DEPS_DIR}/cmake-install/bin:$PATH
+tar -xf "${CMAKE_TAR}"
+mv "${CMAKE}" cmake-install
+export "PATH=${DEPS_DIR}/cmake-install:${DEPS_DIR}/cmake-install/bin:$PATH"
 popd
diff --git a/.travis/install_cmake_old.sh b/.travis/install_cmake_old.sh
new file mode 100644
index 0000000..f5d6932
--- /dev/null
+++ b/.travis/install_cmake_old.sh
@@ -0,0 +1,13 @@
+#!/bin/sh
+
+DEPS_DIR="${TRAVIS_BUILD_DIR}/deps"
+mkdir ${DEPS_DIR} && pushd ${DEPS_DIR}
+CMAKE="cmake-3.1.0-Linux-x86_64"
+CMAKE_TAR="${CMAKE}.tar.gz"
+travis_retry wget --no-check-certificate "https://github.com/Kitware/CMake/releases/download/v3.1.0/${CMAKE_TAR}"
+echo "9fb313d98eac5eedc654a3164d33becd ${CMAKE_TAR}" > cmake_md5.txt
+md5sum -c cmake_md5.txt
+tar -xf "${CMAKE_TAR}"
+mv "${CMAKE}" cmake-install
+export "PATH=${DEPS_DIR}/cmake-install:${DEPS_DIR}/cmake-install/bin:$PATH"
+popd
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3a8084d..7873170 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -63,8 +63,12 @@ endif ()
 
 # When RUN_TEST is enabled, `target_link_options` used in fuzzing test requires 3.13.
 # When RUN_TEST is disabled, I'm not sure what minimum version is required, but
-# anecdotally it's higher than 3.0.
-cmake_minimum_required (VERSION 3.13)
+# it worked when tested at 3.1.
+if (RUN_TEST)
+  cmake_minimum_required (VERSION 3.13)
+else ()
+  cmake_minimum_required (VERSION 3.1)
+endif ()
 
 set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -std=c++11 -fPIC")
 set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -std=c99 -fPIC -D_POSIX_C_SOURCE=200112L")
diff --git a/README.md b/README.md
index 35ce8c7..4d8d686 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ Simple cmake project.
 ```ShellSession
 $ mkdir build
 $ cd build
-$ cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=path/to/usr
+$ cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=path/to/usr -DCMAKE_INSTALL_LIBDIR=lib -DCMAKE_INSTALL_BINDIR=bin
 $ make sxg
 $ sudo make install
 ```