diff --git a/src/data/impl/LedgerCacheFile.cpp b/src/data/impl/LedgerCacheFile.cpp
index 34f7b71d..a171e791 100644
--- a/src/data/impl/LedgerCacheFile.cpp
+++ b/src/data/impl/LedgerCacheFile.cpp
@@ -115,6 +115,11 @@ LedgerCacheFile::write(DataView dataView)
     auto const hash = file.hash();
     file.write(hash.data(), decltype(hash)::bytes);
 
+    // flush internal buffer explicitly before renaming
+    if (auto const expectedSuccess = file.close(); not expectedSuccess.has_value()) {
+        return expectedSuccess;
+    }
+
     try {
         std::filesystem::rename(newFilePath, path_);
     } catch (std::exception const& e) {
diff --git a/src/data/impl/OutputFile.cpp b/src/data/impl/OutputFile.cpp
index e7837979..5228133a 100644
--- a/src/data/impl/OutputFile.cpp
+++ b/src/data/impl/OutputFile.cpp
@@ -23,6 +23,7 @@
 
 #include <cstddef>
 #include <cstring>
+#include <expected>
 #include <ios>
 #include <string>
 #include <utility>
@@ -59,4 +60,14 @@ OutputFile::hash() const
     return std::move(sum).finalize();
 }
 
+std::expected<void, std::string>
+OutputFile::close()
+{
+    file_.close();
+    if (not file_) {
+        return std::unexpected{"Error closing cache file"};
+    }
+    return {};
+}
+
 }  // namespace data::impl
diff --git a/src/data/impl/OutputFile.hpp b/src/data/impl/OutputFile.hpp
index f0e0c94f..480b85e3 100644
--- a/src/data/impl/OutputFile.hpp
+++ b/src/data/impl/OutputFile.hpp
@@ -25,6 +25,7 @@
 
 #include <cstddef>
 #include <cstring>
+#include <expected>
 #include <fstream>
 #include <string>
 
@@ -60,6 +61,9 @@ public:
     ripple::uint256
     hash() const;
 
+    std::expected<void, std::string>
+    close();
+
 private:
     void
     writeToFile(char const* data, size_t size);