diff --git a/pixelocr/page.py b/pixelocr/page.py
index 30059a1..5db0b72 100644
--- a/pixelocr/page.py
+++ b/pixelocr/page.py
@@ -174,7 +174,7 @@ class Line(PageObject):
         bottom = np.argmin(gradient) + skip
         return self.y + bottom
 
-    @property
+    @cached_property
     @collect_iterable
     def glyphs(self):
         labels, max_label = ndimage.label(self.image.bitmap, CONNECTIVITY8)