diff --git a/src/indexer.cc b/src/indexer.cc
index 19b3ea7a..5cbde5e4 100644
--- a/src/indexer.cc
+++ b/src/indexer.cc
@@ -264,7 +264,7 @@ std::string GetDocumentContentInRange(CXTranslationUnit cx_tu,
 }  // namespace
 
 // static
-int IndexFile::kCurrentVersion = 4;
+int IndexFile::kCurrentVersion = 5;
 
 IndexFile::IndexFile(const std::string& path) : id_cache(path), path(path) {
   // TODO: Reconsider if we should still be reusing the same id_cache.