diff --git a/src/dwarfs/compression/flac.cpp b/src/dwarfs/compression/flac.cpp
index d9b5c6d8..a8a6b75e 100644
--- a/src/dwarfs/compression/flac.cpp
+++ b/src/dwarfs/compression/flac.cpp
@@ -212,14 +212,14 @@ class flac_block_compressor final : public block_compressor::impl {
                    "internal error: flac compression requires metadata");
     }
 
-    auto meta = folly::parseJson(*metadata);
+    auto meta = nlohmann::json::parse(*metadata);
 
-    auto endianness = meta["endianness"].asString();
-    auto signedness = meta["signedness"].asString();
-    auto padding = meta["padding"].asString();
-    auto num_channels = meta["number_of_channels"].asInt();
-    auto bits_per_sample = meta["bits_per_sample"].asInt();
-    auto bytes_per_sample = meta["bytes_per_sample"].asInt();
+    auto endianness = meta["endianness"].get<std::string>();
+    auto signedness = meta["signedness"].get<std::string>();
+    auto padding = meta["padding"].get<std::string>();
+    auto num_channels = meta["number_of_channels"].get<int>();
+    auto bits_per_sample = meta["bits_per_sample"].get<int>();
+    auto bytes_per_sample = meta["bytes_per_sample"].get<int>();
 
     assert(1 <= bytes_per_sample && bytes_per_sample <= 4);
     assert(8 <= bits_per_sample && bits_per_sample <= 32);
@@ -368,10 +368,10 @@ class flac_block_compressor final : public block_compressor::impl {
 
   compression_constraints
   get_compression_constraints(std::string const& metadata) const override {
-    auto meta = folly::parseJson(metadata);
+    auto meta = nlohmann::json::parse(metadata);
 
-    auto num_channels = meta["number_of_channels"].asInt();
-    auto bytes_per_sample = meta["bytes_per_sample"].asInt();
+    auto num_channels = meta["number_of_channels"].get<int>();
+    auto bytes_per_sample = meta["bytes_per_sample"].get<int>();
 
     compression_constraints cc;
 
diff --git a/src/dwarfs/file_scanner.cpp b/src/dwarfs/file_scanner.cpp
index 2231097e..1fefe8aa 100644
--- a/src/dwarfs/file_scanner.cpp
+++ b/src/dwarfs/file_scanner.cpp
@@ -27,10 +27,11 @@
 
 #include <folly/String.h>
 #include <folly/container/F14Map.h>
-#include <folly/json.h>
 
 #include <fmt/format.h>
 
+#include <nlohmann/json.hpp>
+
 #include "dwarfs/checksum.h"
 #include "dwarfs/entry.h"
 #include "dwarfs/file_scanner.h"
@@ -569,7 +570,8 @@ void file_scanner_<LoggerPolicy>::dump_value(std::ostream& os,
   os << "{\n"
      << "        \"ptr\": \""
      << fmt::format("{}", reinterpret_cast<void const*>(p)) << "\",\n"
-     << "        \"path\": " << folly::toJson(p->path_as_string()) << ",\n"
+     << "        \"path\": " << nlohmann::json{p->path_as_string()}.dump()
+     << ",\n"
      << "        \"size\": " << fmt::format("{}", p->size()) << ",\n"
      << "        \"refcnt\": " << fmt::format("{}", p->refcount()) << ",\n"
      << "        \"hash\": \"" << folly::hexlify(p->hash()) << "\",\n"
diff --git a/test/fits_categorizer_test.cpp b/test/fits_categorizer_test.cpp
index 2c1a556d..ab493397 100644
--- a/test/fits_categorizer_test.cpp
+++ b/test/fits_categorizer_test.cpp
@@ -31,9 +31,10 @@
 #include <boost/program_options.hpp>
 
 #include <folly/String.h>
-#include <folly/json.h>
 #include <folly/lang/Bits.h>
 
+#include <nlohmann/json.hpp>
+
 #include "dwarfs/categorizer.h"
 #include "dwarfs/mmap.h"
 
@@ -171,7 +172,7 @@ TEST_F(fits_categorizer, unused_lsb_count_test) {
     EXPECT_EQ(1, unused_lsb_counts.size());
     unsigned unused_lsb_count = *unused_lsb_counts.begin();
     auto json = catmgr->category_metadata(cat);
-    auto metadata = folly::parseJson(json);
-    EXPECT_EQ(unused_lsb_count, metadata["unused_lsb_count"].asInt());
+    auto metadata = nlohmann::json::parse(json);
+    EXPECT_EQ(unused_lsb_count, metadata["unused_lsb_count"].get<int>());
   }
 }