use find_package for GTest
diff --git a/src/Unittests/CMakeLists.txt b/src/Unittests/CMakeLists.txt
index 0d7fb92..73127db 100644
--- a/src/Unittests/CMakeLists.txt
+++ b/src/Unittests/CMakeLists.txt
@@ -73,20 +73,9 @@ if (NOT DEFINED OPENMESH_BUILD_UNIT_TESTS)
 endif()
 
 if (OPENMESH_BUILD_UNIT_TESTS)
-  # Fetch Gtest from github
-  include(FetchContent)
-  FetchContent_Declare(
-    googletest
-    GIT_REPOSITORY https://github.com/google/googletest.git
-    GIT_TAG f8d7d77c06936315286eb55f8de22cd23c188571 # v1.14.0
-    #FIND_PACKAGE_ARGS NAMES GTest
-  )
-  # For Windows: Prevent overriding the parent project's compiler/linker settings
-  set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
-  FetchContent_MakeAvailable(googletest)
-
   enable_testing()
 
+  find_package(GTest CONFIG)
   find_package(Eigen3)
 
   # Set correct include paths so that the compiler can find the headers