diff --git a/mesonbuild/coredata.py b/mesonbuild/coredata.py
index 8402bece0..26f33f11c 100644
--- a/mesonbuild/coredata.py
+++ b/mesonbuild/coredata.py
@@ -38,7 +38,7 @@ if T.TYPE_CHECKING:
 
     OptionDictType = T.Dict[str, 'UserOption[T.Any]']
 
-version = '0.55.0'
+version = '0.55.999'
 backendlist = ['ninja', 'vs', 'vs2010', 'vs2015', 'vs2017', 'vs2019', 'xcode']
 
 default_yielding = False