diff --git a/src/html/usage.rs b/src/html/usage.rs
index 5ea89472..b40ceadc 100644
--- a/src/html/usage.rs
+++ b/src/html/usage.rs
@@ -21,7 +21,8 @@ thread_local! {
 }
 
 lazy_static! {
-  static ref IDENTIFIER_RE: Regex = Regex::new(r"[^a-zA-Z$_]").unwrap();
+  static ref IDENTIFIER_RE: Regex =
+    Regex::new(r"^[0-9]|[^a-zA-Z0-9$_]").unwrap();
 }
 
 fn render_css_for_usage(name: &str) -> String {
diff --git a/tests/snapshots/html_test__html_doc_files_multiple-66.snap b/tests/snapshots/html_test__html_doc_files_multiple-66.snap
index 0f556760..9f797e0b 100644
--- a/tests/snapshots/html_test__html_doc_files_multiple-66.snap
+++ b/tests/snapshots/html_test__html_doc_files_multiple-66.snap
@@ -105,8 +105,8 @@ Variables</h2></div><div class="namespaceSection"><div id="namespace_default" cl
 </section>
 </main><div class="toc">
     <div><div class="usageContent">
-    <h3>Usage</h3><div class="markdown"><pre class="highlight"><code class="language-typescript">import * as bar from &quot;foo&quot;;
-</code><button class="context_button" data-copy="import * as bar from &quot;foo&quot;;
+    <h3>Usage</h3><div class="markdown"><pre class="highlight"><code class="language-typescript">import * as bar123 from &quot;foo&quot;;
+</code><button class="context_button" data-copy="import * as bar123 from &quot;foo&quot;;
 "><svg class="copy" width="15" height="15" viewBox="0 0 15 15" fill="none" xmlns="http://www.w3.org/2000/svg">
 <rect x="2" y="2" width="7" height="7" fill="none"/>
 <rect x="6" y="6" width="7" height="7" fill="none"/>
diff --git a/tests/snapshots/html_test__html_doc_files_multiple-67.snap b/tests/snapshots/html_test__html_doc_files_multiple-67.snap
index 06a96583..dbec701d 100644
--- a/tests/snapshots/html_test__html_doc_files_multiple-67.snap
+++ b/tests/snapshots/html_test__html_doc_files_multiple-67.snap
@@ -87,8 +87,8 @@ Type</h2></div><div class="space-y-8"><div class=" docEntry" id="variable_defaul
     </article></main>
 <div class="toc">
     <div><div class="usageContent">
-    <h3>Usage</h3><div class="markdown"><pre class="highlight"><code class="language-typescript">import bar from &quot;foo&quot;;
-</code><button class="context_button" data-copy="import bar from &quot;foo&quot;;
+    <h3>Usage</h3><div class="markdown"><pre class="highlight"><code class="language-typescript">import bar123 from &quot;foo&quot;;
+</code><button class="context_button" data-copy="import bar123 from &quot;foo&quot;;
 "><svg class="copy" width="15" height="15" viewBox="0 0 15 15" fill="none" xmlns="http://www.w3.org/2000/svg">
 <rect x="2" y="2" width="7" height="7" fill="none"/>
 <rect x="6" y="6" width="7" height="7" fill="none"/>
diff --git a/tests/snapshots/html_test__symbol_group.snap b/tests/snapshots/html_test__symbol_group.snap
index c4ff5ae0..6fcdfdaa 100644
--- a/tests/snapshots/html_test__symbol_group.snap
+++ b/tests/snapshots/html_test__symbol_group.snap
@@ -8641,7 +8641,7 @@ expression: files
         "usages": [
           {
             "name": "",
-            "content": "<div class=\"markdown\"><pre class=\"highlight\"><code class=\"language-typescript\">import bar from &quot;foo&quot;;\n</code><button class=\"context_button\" data-copy=\"import bar from &quot;foo&quot;;\n\"><svg class=\"copy\" width=\"15\" height=\"15\" viewBox=\"0 0 15 15\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\">\n<rect x=\"2\" y=\"2\" width=\"7\" height=\"7\" fill=\"none\"/>\n<rect x=\"6\" y=\"6\" width=\"7\" height=\"7\" fill=\"none\"/>\n<path d=\"M1.55566 2.7C1.55566 2.03726 2.09292 1.5 2.75566 1.5H8.75566C9.41841 1.5 9.95566 2.03726 9.95566 2.7V5.1H12.3557C13.0184 5.1 13.5557 5.63726 13.5557 6.3V12.3C13.5557 12.9627 13.0184 13.5 12.3557 13.5H6.35566C5.69292 13.5 5.15566 12.9627 5.15566 12.3V9.9H2.75566C2.09292 9.9 1.55566 9.36274 1.55566 8.7V2.7ZM6.35566 9.9V12.3H12.3557V6.3H9.95566V8.7C9.95566 9.36274 9.41841 9.9 8.75566 9.9H6.35566ZM8.75566 8.7V2.7H2.75566V8.7H8.75566Z\" fill=\"#232323\"/>\n</svg>\n<svg class=\"check\" width=\"15\" height=\"15\" viewBox=\"0 0 24 24\" stroke-width=\"2\" stroke=\"#232323\" fill=\"none\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http://www.w3.org/2000/svg\">\n<path stroke=\"none\" d=\"M0 0h24v24H0z\" fill=\"none\" />\n<path d=\"M5 12l5 5l10 -10\" />\n</svg>\n</button><code></code></pre>\n</div>",
+            "content": "<div class=\"markdown\"><pre class=\"highlight\"><code class=\"language-typescript\">import bar123 from &quot;foo&quot;;\n</code><button class=\"context_button\" data-copy=\"import bar123 from &quot;foo&quot;;\n\"><svg class=\"copy\" width=\"15\" height=\"15\" viewBox=\"0 0 15 15\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\">\n<rect x=\"2\" y=\"2\" width=\"7\" height=\"7\" fill=\"none\"/>\n<rect x=\"6\" y=\"6\" width=\"7\" height=\"7\" fill=\"none\"/>\n<path d=\"M1.55566 2.7C1.55566 2.03726 2.09292 1.5 2.75566 1.5H8.75566C9.41841 1.5 9.95566 2.03726 9.95566 2.7V5.1H12.3557C13.0184 5.1 13.5557 5.63726 13.5557 6.3V12.3C13.5557 12.9627 13.0184 13.5 12.3557 13.5H6.35566C5.69292 13.5 5.15566 12.9627 5.15566 12.3V9.9H2.75566C2.09292 9.9 1.55566 9.36274 1.55566 8.7V2.7ZM6.35566 9.9V12.3H12.3557V6.3H9.95566V8.7C9.95566 9.36274 9.41841 9.9 8.75566 9.9H6.35566ZM8.75566 8.7V2.7H2.75566V8.7H8.75566Z\" fill=\"#232323\"/>\n</svg>\n<svg class=\"check\" width=\"15\" height=\"15\" viewBox=\"0 0 24 24\" stroke-width=\"2\" stroke=\"#232323\" fill=\"none\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http://www.w3.org/2000/svg\">\n<path stroke=\"none\" d=\"M0 0h24v24H0z\" fill=\"none\" />\n<path d=\"M5 12l5 5l10 -10\" />\n</svg>\n</button><code></code></pre>\n</div>",
             "icon": null,
             "additional_css": ""
           }
diff --git a/tests/testdata/multiple/b.ts b/tests/testdata/multiple/b.ts
index 98f877f5..46f7773b 100644
--- a/tests/testdata/multiple/b.ts
+++ b/tests/testdata/multiple/b.ts
@@ -1,5 +1,5 @@
 /**
- * @module bar
+ * @module bar123
  */
 
 export function x(_n = 0) {}