diff --git a/lib/ProjectManager.js b/lib/ProjectManager.js
index d68c0273..096ea3eb 100644
--- a/lib/ProjectManager.js
+++ b/lib/ProjectManager.js
@@ -60,9 +60,9 @@ class ProjectManager
         const template =
 `{
     "uris": [
-        "file://${mainFolder}"
+        "file://${mainFolder.replace(/\\/g, '\\\\')}"
     ],
-    "indexDatabaseUri": "${indexDatabaseUri}",
+    "indexDatabaseUri": "${indexDatabaseUri.replace(/\\/g, '\\\\')}",
     "phpVersion": 7.3,
     "excludedPathExpressions": [],
     "fileExtensions": [