diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7eae591079..2b7ed2fad9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,7 @@ This was added in [pull request #2164: Enable cookie banner to set link styled a
 - [#2132: Improve vertical alignment of phase banner tag on mobile devices](https://github.com/alphagov/govuk-frontend/pull/2132) – thanks to [@matthewmascord](https://github.com/matthewmascord) for contributing this.
 - [#2157: Use pointer cursor for 'Menu' button in header](https://github.com/alphagov/govuk-frontend/pull/2157) – thanks to [@MalcolmVonMoJ](https://github.com/MalcolmVonMoJ) for contributing this.
 - [#2171: Fix padding on GOV.UK logo affecting hover and focus states](https://github.com/alphagov/govuk-frontend/pull/2171)
+- [#2186: Fix display of warning text in Edge when Windows High Contrast Mode is enabled](https://github.com/alphagov/govuk-frontend/pull/2186)
 
 ## 3.11.0 (Feature release)
 
diff --git a/src/govuk/components/warning-text/_index.scss b/src/govuk/components/warning-text/_index.scss
index 12b5d3fafb..a0d5edb943 100644
--- a/src/govuk/components/warning-text/_index.scss
+++ b/src/govuk/components/warning-text/_index.scss
@@ -43,6 +43,16 @@
     // Prevent the exclamation mark from being included when the warning text
     // is copied, for example.
     user-select: none;
+
+    // Improve rendering in Windows High Contrast Mode (Edge), where a
+    // readability backplate behind the exclamation mark obscures the circle
+    forced-color-adjust: none;
+
+    @media screen and (forced-colors: active) {
+      border-color: windowText;
+      color: windowText;
+      background: transparent;
+    }
   }
 
   .govuk-warning-text__text {