diff --git a/news/win-libcblas.rst b/news/win-libcblas.rst
new file mode 100644
index 0000000..96ada26
--- /dev/null
+++ b/news/win-libcblas.rst
@@ -0,0 +1,23 @@
+**Added:**
+
+* <news item>
+
+**Changed:**
+
+* <news item>
+
+**Deprecated:**
+
+* <news item>
+
+**Removed:**
+
+* <news item>
+
+**Fixed:**
+
+* Add ``libsblas.dll`` to build pypi wheel in windows.
+
+**Security:**
+
+* <news item>
diff --git a/setup.py b/setup.py
index 9a334a8..7c3b12d 100644
--- a/setup.py
+++ b/setup.py
@@ -199,10 +199,18 @@ def create_extensions():
 
 
 # Extensions not included in pyproject.toml
-setup_args = dict(
-    ext_modules=[],
-    cmdclass={"build_ext": CustomBuildExt},
-)
+
+if sys.platform.startswith("win"):
+    setup_args = dict(
+        ext_modules=[],
+        cmdclass={"build_ext": CustomBuildExt},
+        package_data={"diffpy.pdffit2": ["libcblas.dll"]},
+    )
+else:
+    setup_args = dict(
+        ext_modules=[],
+        cmdclass={"build_ext": CustomBuildExt},
+    )
 
 
 if __name__ == "__main__":
diff --git a/src/diffpy/pdffit2/libcblas.dll b/src/diffpy/pdffit2/libcblas.dll
new file mode 100644
index 0000000..66a20b9
Binary files /dev/null and b/src/diffpy/pdffit2/libcblas.dll differ