diff --git a/build.bat b/build.bat
index 3aba862..47c11f2 100644
--- a/build.bat
+++ b/build.bat
@@ -1,5 +1,5 @@
 @echo off
-set ver=0.3.9
+set ver=0.4.0
 rem build script for the distributable versions of tadpole
 if not exist "venv\" (
     py -m venv venv
diff --git a/versioninfo b/versioninfo
index c1cc7b4..c79733e 100644
--- a/versioninfo
+++ b/versioninfo
@@ -1,7 +1,7 @@
 VSVersionInfo(
   ffi=FixedFileInfo(
-    filevers=(0, 3, 8, 0),
-    prodvers=(0, 3, 8, 0),
+    filevers=(0, 4, 0, 0),
+    prodvers=(0, 4, 0, 0),
     mask=0x3f,
     flags=0x0,
     OS=0x4,
@@ -15,12 +15,12 @@ VSVersionInfo(
         u'080904B0',
         [StringStruct(u'CompanyName', u'EricGoldstein'),
         StringStruct(u'FileDescription', u'tadpole'),
-        StringStruct(u'FileVersion', u'0.3.8'),
+        StringStruct(u'FileVersion', u'0.4.0'),
         StringStruct(u'InternalName', u'tadpole'),
         StringStruct(u'LegalCopyright', u'by EricGoldstein 2023'),
         StringStruct(u'OriginalFilename', u'tadpole.exe'),
         StringStruct(u'ProductName', u'tadpole'),
-        StringStruct(u'ProductVersion', u'0.3.8')])
+        StringStruct(u'ProductVersion', u'0.4.0')])
       ]),
     VarFileInfo([VarStruct(u'Translation', [2057, 1200])])
   ]