diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,11 +8,7 @@
 
 project(qca)
 
-if(NOT APPLE)
-  cmake_minimum_required(VERSION 2.8.12)
-else()
-  cmake_minimum_required(VERSION 3.0)
-endif()
+cmake_minimum_required(VERSION 3.4)
 
 set(QCA_LIB_MAJOR_VERSION "2")
 set(QCA_LIB_MINOR_VERSION "2")
diff --git a/cmake/modules/QcaMacro.cmake b/cmake/modules/QcaMacro.cmake
--- a/cmake/modules/QcaMacro.cmake
+++ b/cmake/modules/QcaMacro.cmake
@@ -11,15 +11,14 @@
   ENDMACRO(QT4_GET_MOC_INC_DIRS)
 
   MACRO(SETUP_QT5_DIRS)
-    GET_TARGET_PROPERTY(QMAKE_EXECUTABLE ${Qt5Core_QMAKE_EXECUTABLE} LOCATION)
-    EXEC_PROGRAM( ${QMAKE_EXECUTABLE} ARGS "-query QT_INSTALL_LIBS" OUTPUT_VARIABLE QT_LIBRARY_DIR )
-    EXEC_PROGRAM( ${QMAKE_EXECUTABLE} ARGS "-query QT_INSTALL_PREFIX" OUTPUT_VARIABLE QT_PREFIX_DIR )
-    EXEC_PROGRAM( ${QMAKE_EXECUTABLE} ARGS "-query QT_INSTALL_PLUGINS" OUTPUT_VARIABLE QT_PLUGINS_DIR )
-    EXEC_PROGRAM( ${QMAKE_EXECUTABLE} ARGS "-query QT_INSTALL_BINS" OUTPUT_VARIABLE QT_BINARY_DIR )
-    EXEC_PROGRAM( ${QMAKE_EXECUTABLE} ARGS "-query QT_INSTALL_HEADERS" OUTPUT_VARIABLE QT_HEADERS_DIR )
-    EXEC_PROGRAM( ${QMAKE_EXECUTABLE} ARGS "-query QT_INSTALL_DOCS" OUTPUT_VARIABLE QT_DOC_DIR )
-    EXEC_PROGRAM( ${QMAKE_EXECUTABLE} ARGS "-query QT_INSTALL_DATA" OUTPUT_VARIABLE QT_DATA_DIR )
-    EXEC_PROGRAM( ${QMAKE_EXECUTABLE} ARGS "-query QT_HOST_DATA" OUTPUT_VARIABLE QT_ARCHDATA_DIR )
+    EXEC_PROGRAM( $<TARGET_FILE:Qt5::qmake> ARGS "-query QT_INSTALL_LIBS" OUTPUT_VARIABLE QT_LIBRARY_DIR )
+    EXEC_PROGRAM( $<TARGET_FILE:Qt5::qmake> ARGS "-query QT_INSTALL_PREFIX" OUTPUT_VARIABLE QT_PREFIX_DIR )
+    EXEC_PROGRAM( $<TARGET_FILE:Qt5::qmake> ARGS "-query QT_INSTALL_PLUGINS" OUTPUT_VARIABLE QT_PLUGINS_DIR )
+    EXEC_PROGRAM( $<TARGET_FILE:Qt5::qmake> ARGS "-query QT_INSTALL_BINS" OUTPUT_VARIABLE QT_BINARY_DIR )
+    EXEC_PROGRAM( $<TARGET_FILE:Qt5::qmake> ARGS "-query QT_INSTALL_HEADERS" OUTPUT_VARIABLE QT_HEADERS_DIR )
+    EXEC_PROGRAM( $<TARGET_FILE:Qt5::qmake> ARGS "-query QT_INSTALL_DOCS" OUTPUT_VARIABLE QT_DOC_DIR )
+    EXEC_PROGRAM( $<TARGET_FILE:Qt5::qmake> ARGS "-query QT_INSTALL_DATA" OUTPUT_VARIABLE QT_DATA_DIR )
+    EXEC_PROGRAM( $<TARGET_FILE:Qt5::qmake> ARGS "-query QT_HOST_DATA" OUTPUT_VARIABLE QT_ARCHDATA_DIR )
     SET( QT_MKSPECS_DIR "${QT_ARCHDATA_DIR}/mkspecs" )
   ENDMACRO(SETUP_QT5_DIRS)
 ELSE (Qt5Core_FOUND)
@@ -102,13 +101,8 @@
 
 macro(install_pdb TARGET INSTALL_PATH)
   if(MSVC)
-    get_target_property(LOCATION ${TARGET} LOCATION_DEBUG)
-    string(REGEX REPLACE "\\.[^.]*$" ".pdb" LOCATION "${LOCATION}")
-    install(FILES ${LOCATION} DESTINATION ${INSTALL_PATH} CONFIGURATIONS Debug)
-
-    get_target_property(LOCATION ${TARGET} LOCATION_RELWITHDEBINFO)
-    string(REGEX REPLACE "\\.[^.]*$" ".pdb" LOCATION "${LOCATION}")
-    install(FILES ${LOCATION} DESTINATION ${INSTALL_PATH} CONFIGURATIONS RelWithDebInfo)
+    install(FILES $<TARGET_PDB_FILE:${TARGET}> DESTINATION ${INSTALL_PATH} CONFIGURATIONS Debug)
+    install(FILES $<TARGET_PDB_FILE:${TARGET}> DESTINATION ${INSTALL_PATH} CONFIGURATIONS RelWithDebInfo)
   endif(MSVC)
 endmacro(install_pdb)
 
diff --git a/plugins/qca-ossl/CMakeLists.txt b/plugins/qca-ossl/CMakeLists.txt
--- a/plugins/qca-ossl/CMakeLists.txt
+++ b/plugins/qca-ossl/CMakeLists.txt
@@ -56,28 +56,16 @@
     set_property(TARGET qca-ossl PROPERTY SUFFIX ".dylib")
   endif()
 
-  include_directories(${OPENSSL_INCLUDE_DIR})
   target_link_libraries(qca-ossl ${QT_QTCORE_LIBRARY})
   target_link_libraries(qca-ossl ${QCA_LIB_NAME})
-  target_link_libraries(qca-ossl ${OPENSSL_LIBRARIES})
-
-  if(APPLE)
-    target_link_libraries(qca-ossl crypto)
-  endif(APPLE)
-
-  if(WIN32)
-    add_definitions(-DOSSL_097)
-    target_link_libraries(qca-ossl gdi32)
-    target_link_libraries(qca-ossl wsock32)
-    target_link_libraries(qca-ossl ${OPENSSL_EAY_LIBRARIES})
-  endif(WIN32)
+  target_link_libraries(qca-ossl OpenSSL::SSL OpenSSL::Crypto)
 
   if(NOT DEVELOPER_MODE)
     install(TARGETS qca-ossl
             LIBRARY DESTINATION "${QCA_CRYPTO_INSTALL_DIR}"
             ARCHIVE DESTINATION "${QCA_CRYPTO_INSTALL_DIR}"
             RUNTIME DESTINATION "${QCA_CRYPTO_INSTALL_DIR}")
-  
+
     install_pdb(qca-ossl ${QCA_CRYPTO_INSTALL_DIR})
   endif()