diff --git a/avogadro/lastinstall/CMakeLists.txt b/avogadro/lastinstall/CMakeLists.txt
index 2bf87a6b..527f26e2 100644
--- a/avogadro/lastinstall/CMakeLists.txt
+++ b/avogadro/lastinstall/CMakeLists.txt
@@ -35,14 +35,10 @@ if((APPLE OR WIN32) AND NOT ${CMAKE_VERSION} VERSION_LESS 2.8.8)
 
   # grab OpenSSL for Windows
   if(WIN32)
-    if(EXISTS "${Qt5_Dir}/../../Tools/OpenSSLv3/Win_x64/")
-      set(OPENSSL_ROOT_DIR "${Qt5_Dir}/../../Tools/OpenSSLv3/Win_x64/")
+    find_package(OpenSSL REQUIRED)
+    if (DEFINED OPENSSL_FOUND)
+      set(OPENSSL_ROOT_DIR "${OPENSSL_INCLUDE_DIR}/.." CACHE PATH "OpenSSL root directory")
       message(STATUS "Using OpenSSL from ${OPENSSL_ROOT_DIR}")
-    elseif(DEFINED $ENV{OPENSSL_ROOT_DIR})
-      set(OPENSSL_ROOT_DIR $ENV{OPENSSL_ROOT_DIR})
-      message(STATUS "Using OpenSSL from ${OPENSSL_ROOT_DIR}")
-    endif()
-    if (DEFINED OPENSSL_ROOT_DIR)
       file(GLOB OPENSSL_DLL ${OPENSSL_ROOT_DIR}/bin/*.dll)
       install(FILES ${OPENSSL_DLL} DESTINATION ${INSTALL_RUNTIME_DIR})
     endif()
diff --git a/cmake/AvogadroCPack.cmake b/cmake/AvogadroCPack.cmake
index 6827385d..3b84d087 100644
--- a/cmake/AvogadroCPack.cmake
+++ b/cmake/AvogadroCPack.cmake
@@ -53,16 +53,9 @@ if(INSTALL_BUNDLE_FILES)
 
   # grab OpenSSL for Windows
   if(WIN32)
-    if(EXISTS "${Qt5_Dir}/../../Tools/OpenSSLv3/Win_x64/")
-      set(OPENSSL_ROOT_DIR "${Qt5_Dir}/../../Tools/OpenSSLv3/Win_x64/")
-    elseif(DEFINED $ENV{OPENSSL_ROOT_DIR})
-      set(OPENSSL_ROOT_DIR $ENV{OPENSSL_ROOT_DIR})
-    elseif(EXISTS "D:/a/avogadroapp/Qt/Tools/OpenSSLv3/Win_x64/")
-      set(OPENSSL_ROOT_DIR "D:/a/avogadroapp/Qt/Tools/OpenSSLv3/Win_x64")
-    elseif(EXISTS "D:/a/avogadrolibs/Qt/Tools/OpenSSLv3/Win_x64/")
-      set(OPENSSL_ROOT_DIR "D:/a/avogadrolibs/Qt/Tools/OpenSSLv3/Win_x64")
-    endif()
-    if (DEFINED OPENSSL_ROOT_DIR)
+    find_package(OpenSSL REQUIRED)
+    if (DEFINED OPENSSL_FOUND)
+      set(OPENSSL_ROOT_DIR "${OPENSSL_INCLUDE_DIR}/.." CACHE PATH "OpenSSL root directory")
       message(STATUS "Using OpenSSL from ${OPENSSL_ROOT_DIR}")
       file(GLOB OPENSSL_DLL ${OPENSSL_ROOT_DIR}/bin/*.dll)
       install(FILES ${OPENSSL_DLL} DESTINATION ${INSTALL_RUNTIME_DIR})