diff --git a/README.md b/README.md
index ac7905f..e80fe03 100644
--- a/README.md
+++ b/README.md
@@ -73,6 +73,9 @@ Help support Gdspy development by [donating via PayPal](https://www.paypal.com/c
 
 ## History of changes
 
+### Version 1.6.8 (Unreleased)
+* Fix in `boolean` for complex geometries that freeze the operation.
+
 ### Version 1.6.7 (Jul 14, 2021)
 * Fixes in `boolean` for bugs with self-intersecting holes and holes horizontal edges.
 * Fix bug in warning message.
diff --git a/gdspy/clipper.cpp b/gdspy/clipper.cpp
index af193a3..f5a599e 100644
--- a/gdspy/clipper.cpp
+++ b/gdspy/clipper.cpp
@@ -4909,7 +4909,7 @@ static PyObject* clip(PyObject *self, PyObject *args)
   Paths subj, clip, result;
   PolyTree solution;
   ClipType oper;
-  Clipper clpr(ioStrictlySimple);
+  Clipper clpr;
 
   if (!PyArg_ParseTuple(args, "OOsd:clip", &polyA, &polyB, &operation, &scaling)) return NULL;
 
@@ -5144,7 +5144,7 @@ static PyObject* chop(PyObject *self, PyObject *args)
   Paths subj(1);
   Paths clip(1, Path(4));
   PolyTree solution;
-  Clipper clpr(ioStrictlySimple);
+  Clipper clpr;
   cInt bb[4];
   cInt pos;
   long num_cuts;
diff --git a/tests/test.gds b/tests/test.gds
index 05c6c5e..6fc1ded 100644
Binary files a/tests/test.gds and b/tests/test.gds differ