diff --git a/CMakeLists.txt b/CMakeLists.txt
index e1bd077..37625da 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -55,9 +55,11 @@ else()
     message(STATUS "Found pybind11: ${pybind11_INCLUDE_DIRS}/pybind11")
 endif()
 
-find_package(NumPy REQUIRED)
-message(STATUS "Found numpy: ${NUMPY_INCLUDE_DIRS}")
-
+if(NOT NUMPY_INCLUDE_DIRS)
+    set(NUMPY_REQUIRED_VERSION 1.14.0)
+    find_package(NumPy ${NUMPY_REQUIRED_VERSION} REQUIRED)
+    message(STATUS "Found numpy: ${NUMPY_INCLUDE_DIRS}")
+endif()
 # Build
 # =====