diff --git a/src/lsp/providers/completionProvider.ts b/src/lsp/providers/completionProvider.ts
index 8f47ca6..6dbb1e7 100644
--- a/src/lsp/providers/completionProvider.ts
+++ b/src/lsp/providers/completionProvider.ts
@@ -126,7 +126,7 @@ function provideClassAttributeCompletions(
     end: position,
   })
 
-  const match = findLast(/[\s:]class(?:Name)?=['"`{]/gi, str)
+  const match = findLast(/(?:\b|:)class(?:Name)?=['"`{]/gi, str)
 
   if (match === null) {
     return null
diff --git a/src/lsp/util/find.ts b/src/lsp/util/find.ts
index 6b1bfca..7a09c30 100644
--- a/src/lsp/util/find.ts
+++ b/src/lsp/util/find.ts
@@ -101,7 +101,7 @@ export function findClassListsInHtmlRange(
   range: Range
 ): DocumentClassList[] {
   const text = doc.getText(range)
-  const matches = findAll(/[\s:]class(?:Name)?=['"`{]/g, text)
+  const matches = findAll(/(?:\b|:)class(?:Name)?=['"`{]/g, text)
   const result: DocumentClassList[] = []
 
   matches.forEach((match) => {