diff --git a/deps/luajit b/deps/luajit
index 69e5342e..bfbcd72e 160000
--- a/deps/luajit
+++ b/deps/luajit
@@ -1 +1 @@
-Subproject commit 69e5342eb893815b18a1ec84ba74b0e0d1cc9beb
+Subproject commit bfbcd72eb7f3bb85be9c765a174a51998e529297
diff --git a/deps/luajit.cmake b/deps/luajit.cmake
index 20733047..dd69d1c1 100644
--- a/deps/luajit.cmake
+++ b/deps/luajit.cmake
@@ -224,6 +224,9 @@ SET(SRC_LJCORE
   ${LUAJIT_DIR}/src/lj_gc.c
   ${LUAJIT_DIR}/src/lj_err.c
   ${LUAJIT_DIR}/src/lj_char.c
+  ${LUAJIT_DIR}/src/lj_buf.c
+  ${LUAJIT_DIR}/src/lj_profile.c
+  ${LUAJIT_DIR}/src/lj_strfmt.c
   ${LUAJIT_DIR}/src/lj_bc.c
   ${LUAJIT_DIR}/src/lj_obj.c
   ${LUAJIT_DIR}/src/lj_str.c
diff --git a/tests/test-conversions.lua b/tests/test-conversions.lua
new file mode 100644
index 00000000..f14056dd
--- /dev/null
+++ b/tests/test-conversions.lua
@@ -0,0 +1,6 @@
+return require('lib/tap')(function (test)
+  test("basic 64bit conversions", function (print, p, expect, uv)
+    assert(string.format("%x", 29913653248) == "6f6fe2000")
+    assert(string.format("%x", 32207650816) == "77fb9c000")
+  end)
+end)