diff --git a/.changeset/sweet-turkey-try.md b/.changeset/sweet-turkey-try.md
new file mode 100644
index 000000000..2d0671f2a
--- /dev/null
+++ b/.changeset/sweet-turkey-try.md
@@ -0,0 +1,5 @@
+---
+'@shopify/theme-language-server-common': patch
+---
+
+Added jj to the URI prefixes ignored by hasUnsupportedDocument
diff --git a/packages/theme-language-server-common/src/server/startServer.ts b/packages/theme-language-server-common/src/server/startServer.ts
index 6664d2393..b0ad21d93 100644
--- a/packages/theme-language-server-common/src/server/startServer.ts
+++ b/packages/theme-language-server-common/src/server/startServer.ts
@@ -75,7 +75,9 @@ const hasUnsupportedDocument = (params: any) => {
     'textDocument' in params &&
     'uri' in params.textDocument &&
     typeof params.textDocument.uri === 'string' &&
-    (params.textDocument.uri.startsWith('git:') || params.textDocument.uri.startsWith('output:'))
+    (params.textDocument.uri.startsWith('jj:') ||
+      params.textDocument.uri.startsWith('git:') ||
+      params.textDocument.uri.startsWith('output:'))
   );
 };