--- a/setup.py
+++ a/setup.py
@@ -23,7 +23,7 @@
 max_python_version = "3.11"  # exclusive
 min_numpy_build_version = "1.11"
 min_numpy_run_version = "1.18"
-max_numpy_run_version = "1.23"
+max_numpy_run_version = "1.24"
 min_llvmlite_version = "0.39.0dev0"
 max_llvmlite_version = "0.40"
 
@@ -236,9 +236,9 @@
     # Set various flags for use in TBB and openmp. On OSX, also find OpenMP!
     have_openmp = True
     if sys.platform.startswith('win'):
-        cpp11flags = []
-        ompcompileflags = ['-openmp']
-        omplinkflags = []
+        cpp11flags = ['-std=c++11']
+        ompcompileflags = ['-fopenmp']
+        omplinkflags = ['-fopenmp']
     elif sys.platform.startswith('darwin'):
         cpp11flags = ['-std=c++11']
         # This is a bit unusual but necessary...