diff --git a/node_modules/micromark-extension-mdx-jsx/dev/lib/factory-tag.js b/node_modules/micromark-extension-mdx-jsx/dev/lib/factory-tag.js
index 36d8f7f..9f9d6eb 100644
--- a/node_modules/micromark-extension-mdx-jsx/dev/lib/factory-tag.js
+++ b/node_modules/micromark-extension-mdx-jsx/dev/lib/factory-tag.js
@@ -151,6 +151,19 @@ export function factoryTag(
    * @type {State}
    */
   function nameBefore(code) {
+    // Netcatty notes are Markdown: numeric comparisons cannot start JSX tags.
+    // Let micromark roll back this construct and keep the literal text.
+    if (
+      code !== codes.eof &&
+      ((code >= codes.digit0 && code <= codes.digit9) ||
+        code === codes.equalsTo ||
+        code === codes.plusSign ||
+        code === codes.dash ||
+        code === codes.dot)
+    ) {
+      return nok(code)
+    }
+
     // Closing tag.
     if (code === codes.slash) {
       effects.enter(tagClosingMarkerType)
diff --git a/node_modules/micromark-extension-mdx-jsx/lib/factory-tag.js b/node_modules/micromark-extension-mdx-jsx/lib/factory-tag.js
index 6beab7e..b501f5e 100644
--- a/node_modules/micromark-extension-mdx-jsx/lib/factory-tag.js
+++ b/node_modules/micromark-extension-mdx-jsx/lib/factory-tag.js
@@ -108,6 +108,19 @@ export function factoryTag(effects, ok, nok, acorn, acornOptions, addResult, all
    * @type {State}
    */
   function nameBefore(code) {
+    // Netcatty notes are Markdown: numeric comparisons cannot start JSX tags.
+    // Let micromark roll back this construct and keep the literal text.
+    if (
+      code !== null &&
+      ((code >= 48 && code <= 57) ||
+        code === 61 ||
+        code === 43 ||
+        code === 45 ||
+        code === 46)
+    ) {
+      return nok(code);
+    }
+
     // Closing tag.
     if (code === 47) {
       effects.enter(tagClosingMarkerType);