diff --git a/.gitignore b/.gitignore
index ebba938..e05dcad 100644
--- a/.gitignore
+++ b/.gitignore
@@ -108,6 +108,9 @@ dist
 # Stores VSCode versions used for testing VSCode extensions
 .vscode-test
 
+# yarn v1
+.yarnclean
+
 # yarn v2
 .yarn/cache
 .yarn/unplugged
diff --git a/.prettierignore b/.prettierignore
index c27defe..baa9ba5 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -108,6 +108,9 @@ dist
 # Stores VSCode versions used for testing VSCode extensions
 .vscode-test
 
+# yarn v1
+.yarnclean
+
 # yarn v2
 .yarn/cache
 .yarn/unplugged