diff --git a/opening-hdf5/src/CMakeLists.txt b/opening-hdf5/src/CMakeLists.txt
index aad0646..07d1489 100644
--- a/opening-hdf5/src/CMakeLists.txt
+++ b/opening-hdf5/src/CMakeLists.txt
@@ -6,7 +6,7 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
-# find_package(netCDF REQUIRED)
+find_package(netCDF REQUIRED)
 
 add_executable(ReadHDF5 main.cpp)