diff --git a/MANIFEST.in b/MANIFEST.in
index af1f1b6..7d750fb 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -5,5 +5,6 @@
 include pyjson5.cpp
 include pyjson5.pyx
 include requires.txt
+include third-party/fast_double_parser/include/fast_double_parser.h
 recursive-include docs **
 recursive-include src **
diff --git a/src/VERSION b/src/VERSION
index f9dde59..340028b 100644
--- a/src/VERSION
+++ b/src/VERSION
@@ -1 +1 @@
-"1.4.9"
+"1.4.9.post1"