diff --git a/transformer/src/Main.cpp b/transformer/src/Main.cpp
index f7b315c..d1e0535 100644
--- a/transformer/src/Main.cpp
+++ b/transformer/src/Main.cpp
@@ -101,7 +101,7 @@ int main(int argc, char* argv[]) {
 
     bool checkNesting = true;
     app.add_flag(
-        "--check-nesting,!--no-check-nesting",
+        "--check-nesting,!--no-nesting",
         checkNesting,
         "Whether or not to check for nested .7zs. DO NOT SET TO FALSE UNLESS YOU KNOW THE ARCHIVE IS GOOD! "
         "Setting this to false when there is nesting will have unintended consequences. All this option does is "
diff --git a/transformer/src/data/ArchiveParser.cpp b/transformer/src/data/ArchiveParser.cpp
index 3e1005d..cc050a3 100644
--- a/transformer/src/data/ArchiveParser.cpp
+++ b/transformer/src/data/ArchiveParser.cpp
@@ -119,6 +119,7 @@ void ArchiveParser::read(const GlobalContext& conf) {
             continue;
         }
         spdlog::info("Extracting {}/{}", ctx.baseDomain, entryName);
+        ctx.lastModified = archive_entry_mtime(entry);
 
         ctx.currType = DataDumpFileType::UNKNOWN;
         ctx.currTypeStr = "";
diff --git a/transformer/src/data/ArchiveParser.hpp b/transformer/src/data/ArchiveParser.hpp
index 2ebbae9..74e6305 100644
--- a/transformer/src/data/ArchiveParser.hpp
+++ b/transformer/src/data/ArchiveParser.hpp
@@ -3,6 +3,7 @@
 #include "data/GlobalContext.hpp"
 #include <archive.h>
 
+#include <ctime>
 #include <filesystem>
 #include <string>
 #include <vector>
@@ -60,6 +61,11 @@ struct ParserContext {
      * Same as currType, but as a string
      */
     std::string currTypeStr;
+
+    /**
+     * The lastModified time of the archive. Used to preserve timestamps
+     */
+    time_t lastModified;
     
     const GlobalContext& conf;
 };
diff --git a/transformer/src/data/ArchiveWriter.cpp b/transformer/src/data/ArchiveWriter.cpp
index 8a164ed..431b268 100644
--- a/transformer/src/data/ArchiveWriter.cpp
+++ b/transformer/src/data/ArchiveWriter.cpp
@@ -57,7 +57,7 @@ ArchiveWriter::~ArchiveWriter() {
         std::filesystem::remove_all(this->tmpOutputDir);
     } else {
         // TODO: This feels sketch
-        for (auto& file : files) { 
+        for (auto& [file, _] : files) { 
             spdlog::debug("Binary file::Removing {}", (this->tmpOutputDir / file).string());
             std::filesystem::remove(this->tmpOutputDir / file);
         }
@@ -66,12 +66,13 @@ ArchiveWriter::~ArchiveWriter() {
 
 void ArchiveWriter::commit() {
 
-    for (auto& file : this->files) {
+    for (auto& [file, attr] : this->files) {
         spdlog::info("Now committing {} to archive {}", file, this->archiveName.filename().string());
         archive_entry* currEntry = archive_entry_new();
         archive_entry_set_pathname(currEntry, file.c_str());
         archive_entry_set_filetype(currEntry, AE_IFREG);
         archive_entry_set_perm(currEntry, 0644);
+        archive_entry_set_mtime(currEntry, attr.lastModified, 0L);
 
         std::ifstream f(this->tmpOutputDir / file, std::ios_base::binary);
 
@@ -113,10 +114,11 @@ void ArchiveWriter::commit() {
 
     spdlog::info("Committing LICENSE to {}", archiveName.filename().string());
     archive_entry* currEntry = archive_entry_new();
-    archive_entry_set_pathname(currEntry, "LICENSE");
+    archive_entry_set_pathname(currEntry, "LICENSE.txt");
     archive_entry_set_filetype(currEntry, AE_IFREG);
     archive_entry_set_perm(currEntry, 0644);
     archive_entry_set_size(currEntry, (int64_t) MetaFiles::dataDumpLicense.size());
+    archive_entry_set_mtime(currEntry, std::time(nullptr), 0);
 
     SEDDARCHIVE_CHECK_ERROR(a, archive_write_header(a, currEntry));
 
@@ -127,12 +129,12 @@ void ArchiveWriter::commit() {
     archive_entry_free(currEntry);
 }
 
-void ArchiveWriter::open(const std::string& filename) {
+void ArchiveWriter::open(const std::string& filename, const FileAttr& attr) {
     if (!createTempDir) {
         throw std::runtime_error("Can't open() without a tempDir");
     }
     spdlog::debug("Opening file {}", filename);
-    this->files.push_back(filename);
+    this->files[filename] = attr;
 
     writer.clear();
     writer.open(tmpOutputDir / filename);
@@ -158,8 +160,8 @@ void ArchiveWriter::close() {
     writer.close();
 }    
 
-void ArchiveWriter::addBinaryFile(const std::string& filename) {
-    this->files.push_back(filename);
+void ArchiveWriter::addBinaryFile(const std::string& filename, const FileAttr& attr) {
+    this->files[filename] = attr;
 }
 
 }
diff --git a/transformer/src/data/ArchiveWriter.hpp b/transformer/src/data/ArchiveWriter.hpp
index 04c122c..1a8b191 100644
--- a/transformer/src/data/ArchiveWriter.hpp
+++ b/transformer/src/data/ArchiveWriter.hpp
@@ -3,12 +3,17 @@
 #include "archive.h"
 #include "archive_entry.h"
 #include <filesystem>
+#include <map>
 #include <string>
 #include <vector>
 #include <fstream>
 
 namespace sedd {
 
+struct FileAttr {
+    time_t lastModified;
+};
+
 class ArchiveWriter {
 private:
     // Approx. 16MB
@@ -16,7 +21,7 @@ class ArchiveWriter {
     std::filesystem::path archiveName;
     std::filesystem::path tmpOutputDir;
 
-    std::vector<std::string> files;
+    std::map<std::string, FileAttr> files;
     archive* a;
     std::ofstream writer;
 
@@ -38,7 +43,7 @@ class ArchiveWriter {
      * Opens a managed text file for writing. Use write() to write to it, and call
      * close() when writing is completed.
      */
-    void open(const std::string& filename);
+    void open(const std::string& filename, const FileAttr& attr);
 
     /**
      * Writes to the current open()ed file
@@ -56,7 +61,7 @@ class ArchiveWriter {
      * It's entirely the responsibility of the invoking transformer to create the file.
      * The file will be opened and written to the archive when commit() is called.
      */
-    void addBinaryFile(const std::string& filename);
+    void addBinaryFile(const std::string& filename, const FileAttr& attr);
 
     /**
      * Commits the saved files (either added with `addBinaryFile`, or managed text
diff --git a/transformer/src/data/transformers/JSONTransformer.cpp b/transformer/src/data/transformers/JSONTransformer.cpp
index 5506a79..41964db 100644
--- a/transformer/src/data/transformers/JSONTransformer.cpp
+++ b/transformer/src/data/transformers/JSONTransformer.cpp
@@ -13,7 +13,9 @@ namespace sedd {
 void JSONTransformer::beginFile(const ParserContext& ctx) {
     auto filename = DataDumpFileType::toFilename(ctx.currType) + ".json";
     spdlog::debug("Starting new file: {}", filename);
-    this->writer->open(filename);
+    this->writer->open(filename, FileAttr { 
+        ctx.lastModified
+    });
     this->writer->write("[\n");
     started = false;
 }
diff --git a/transformer/src/data/util/ArchiveCache.cpp b/transformer/src/data/util/ArchiveCache.cpp
index f4c4a6b..004f162 100644
--- a/transformer/src/data/util/ArchiveCache.cpp
+++ b/transformer/src/data/util/ArchiveCache.cpp
@@ -1,5 +1,6 @@
 #include "ArchiveCache.hpp"
 #include "data/ArchiveParser.hpp"
+#include "data/ArchiveWriter.hpp"
 #include "data/util/ArchiveCache.hpp"
 #include "data/Schema.hpp"
 #include <spdlog/spdlog.h>
@@ -20,7 +21,9 @@ void ArchiveCache::initArchive(const ParserContext& ctx, const std::string& binF
         .exhaustedFiletypes = {}
     };
 
-    cache.writer->addBinaryFile(binFile);
+    cache.writer->addBinaryFile(binFile, FileAttr {
+        ctx.lastModified
+    });
 
     siteColumnMaps[ctx.baseSiteName] = std::move(cache);
 }