diff --git a/src/outcome/_version.py b/src/outcome/_version.py
index c41a4e6..5ccf4e1 100644
--- a/src/outcome/_version.py
+++ b/src/outcome/_version.py
@@ -4,4 +4,4 @@
 if TYPE_CHECKING:
     from typing_extensions import Final
 
-__version__: 'Final[str]' = "1.3.0"
+__version__: 'Final[str]' = "1.3.0+dev"