diff --git a/draftlogs/5673_change.md b/draftlogs/5673_change.md
new file mode 100644
index 00000000000..e9a2a968f23
--- /dev/null
+++ b/draftlogs/5673_change.md
@@ -0,0 +1,2 @@
+ - Relax the valType of `constraintrange` in `parcoords` trace [[#5673](https://github.com/plotly/plotly.js/pull/5673)]
+
diff --git a/src/traces/parcoords/attributes.js b/src/traces/parcoords/attributes.js
index 38ec6167c94..3dbe1670d09 100644
--- a/src/traces/parcoords/attributes.js
+++ b/src/traces/parcoords/attributes.js
@@ -96,8 +96,8 @@ module.exports = {
             freeLength: true,
             dimensions: '1-2',
             items: [
-                {valType: 'number', editType: 'plot'},
-                {valType: 'number', editType: 'plot'}
+                {valType: 'any', editType: 'plot'},
+                {valType: 'any', editType: 'plot'}
             ],
             editType: 'plot',
             description: [
diff --git a/tasks/test_mock.js b/tasks/test_mock.js
index 0503ef8796b..82cf6aeabcc 100644
--- a/tasks/test_mock.js
+++ b/tasks/test_mock.js
@@ -162,12 +162,6 @@ function notBlackListed(name) {
         'gl2d_fonts',
         'gl2d_layout_image',
         'gl2d_marker_coloraxis',
-        'gl2d_parcoords_256_colors',
-        'gl2d_parcoords_constraints',
-        'gl2d_parcoords_out-of-range_selected-above-below',
-        'gl2d_parcoords_out-of-range_selected-all',
-        'gl2d_parcoords_out-of-range_selected-below',
-        'gl2d_parcoords_select_first_last_enum',
         'gl2d_pointcloud-basic',
         'gl2d_rgb_dont_accept_alpha_scattergl',
         'gl2d_scatter-marker-line-colorscales',
diff --git a/test/image/mocks/gl2d_parcoords_out-of-range_selected-all.json b/test/image/mocks/gl2d_parcoords_out-of-range_selected-all.json
index b98c6d88d82..225d5092e41 100644
--- a/test/image/mocks/gl2d_parcoords_out-of-range_selected-all.json
+++ b/test/image/mocks/gl2d_parcoords_out-of-range_selected-all.json
@@ -19,10 +19,8 @@
                 {
                     "label": "A",
                     "constraintrange": [
-                        [
-                            2.5,
-                            10
-                        ]
+                        2.5,
+                        10
                     ],
                     "values": [
                         1,
diff --git a/test/plot-schema.json b/test/plot-schema.json
index ea7e33900b8..150029c1f45 100644
--- a/test/plot-schema.json
+++ b/test/plot-schema.json
@@ -37824,11 +37824,11 @@
         "items": [
          {
           "editType": "plot",
-          "valType": "number"
+          "valType": "any"
          },
          {
           "editType": "plot",
-          "valType": "number"
+          "valType": "any"
          }
         ],
         "valType": "info_array"