diff --git a/Lib/fontParts/base/base.py b/Lib/fontParts/base/base.py
index dbcadb50..39bc35b4 100644
--- a/Lib/fontParts/base/base.py
+++ b/Lib/fontParts/base/base.py
@@ -335,7 +335,7 @@ def copyData(self: BaseObjectType, source: BaseObjectType) -> None:
             if isinstance(selfValue, BaseObject):
                 selfValue.copyData(sourceValue)
             else:
-                setattr(self, attr, sourceValue)
+                setattr(self, attr, deepcopy(sourceValue))
 
     # ----------
     # Exceptions
diff --git a/Lib/fontParts/test/test_info.py b/Lib/fontParts/test/test_info.py
index 3e10eca7..928ed147 100644
--- a/Lib/fontParts/test/test_info.py
+++ b/Lib/fontParts/test/test_info.py
@@ -95,6 +95,18 @@ def test_update(self):
         self.assertEqual(info1.familyName, "test2")
         self.assertEqual(info1.unitsPerEm, 2000)
 
+    # ----
+    # Copy
+    # ----
+    def test_copy(self):
+        info1 = self.getInfo_generic()
+        info1.postscriptBlueValues = [-10, 0, 50, 60]
+
+        info2 = info1.copy()
+        info2.postscriptBlueValues[0] = -2
+
+        self.assertNotEqual(info1.postscriptBlueValues, info2.postscriptBlueValues)
+
     # -------------
     # Interpolation
     # -------------