diff --git a/edit/codemirror-default.js b/edit/codemirror-default.js
index 63ec2423..528033fc 100644
--- a/edit/codemirror-default.js
+++ b/edit/codemirror-default.js
@@ -159,9 +159,11 @@
     'padding-inline-start': true,
     'text-align-all': true,
 
+    // miscellaneous
     'contain': true,
     'mask-image': true,
     'mix-blend-mode': true,
+    'overscroll-behavior': true,
     'rotate': true,
     'isolation': true,
     'zoom': true,
diff --git a/vendor-overwrites/csslint/parserlib.js b/vendor-overwrites/csslint/parserlib.js
index 3bbcad0a..480aef97 100644
--- a/vendor-overwrites/csslint/parserlib.js
+++ b/vendor-overwrites/csslint/parserlib.js
@@ -514,6 +514,11 @@ self.parserlib = (() => {
     'overflow-wrap':   'normal | break-word | anywhere',
     'overflow-x':      '<overflow>',
     'overflow-y':      '<overflow>',
+    'overscroll-behavior': '<overscroll>{1,2}',
+    'overscroll-behavior-block': '<overscroll>',
+    'overscroll-behavior-inline': '<overscroll>',
+    'overscroll-behavior-x': '<overscroll>',
+    'overscroll-behavior-y': '<overscroll>',
 
     // P
     'padding':            '<padding-width>{1,4}',
@@ -1062,6 +1067,8 @@ self.parserlib = (() => {
       '<hsl-color>': '[ <number> | <angle> ] <percentage>{2} [ / <nonnegative-number-or-percentage> ]? | ' +
                      '[ <number> | <angle> ] , <percentage>#{2} [ , <nonnegative-number-or-percentage> ]?',
 
+      '<overscroll>': 'contain | none | auto',
+
       '<shadow>': 'inset? && [ <length>{2,4} && <color>? ]',
 
       '<single-timing-function>': 'linear | <cubic-bezier-timing-function> | <step-timing-function> | frames()',