diff --git a/omegat/project_save.tmx b/omegat/project_save.tmx
index 54cea63f..9c5b4495 100644
--- a/omegat/project_save.tmx
+++ b/omegat/project_save.tmx
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE tmx SYSTEM "tmx11.dtd">
 <tmx version="1.1">
-  <header creationtool="OmegaT" o-tmf="OmegaT TMX" adminlang="EN-US" datatype="plaintext" creationtoolversion="5.8.0_0_86775c3d" segtype="sentence" srclang="en"/>
+  <header creationtool="OmegaT" o-tmf="OmegaT TMX" adminlang="EN-US" datatype="plaintext" creationtoolversion="5.7.1_0_c3206253" segtype="sentence" srclang="en"/>
   <body>
 <!-- Default translations -->
     <tu>
