diff --git a/json/src/com/jetbrains/jsonSchema/JsonSchemaVfsListener.java b/json/src/com/jetbrains/jsonSchema/JsonSchemaVfsListener.java
index cfd9d8525d58..171e4701eddb 100644
--- a/json/src/com/jetbrains/jsonSchema/JsonSchemaVfsListener.java
+++ b/json/src/com/jetbrains/jsonSchema/JsonSchemaVfsListener.java
@@ -75,7 +75,7 @@ public class JsonSchemaVfsListener extends BulkVirtualFileListenerAdapter {
         Collection<VirtualFile> scope = new HashSet<>(myDirtySchemas);
         myDirtySchemas.removeAll(scope);
 
-        Collection<VirtualFile> finalScope = ContainerUtil.filter(scope, file -> myService.isApplicableToFile(file) && myService.isSchemaFile(file));
+        Collection<VirtualFile> finalScope = ReadAction.compute(() -> ContainerUtil.filter(scope, file -> myService.isApplicableToFile(file) && myService.isSchemaFile(file)));
         if (finalScope.isEmpty()) return;
         myProject.getMessageBus().syncPublisher(JSON_SCHEMA_CHANGED).run();