diff --git a/mypy/version.py b/mypy/version.py
index 54d5d65e0..b02af6334 100644
--- a/mypy/version.py
+++ b/mypy/version.py
@@ -14,8 +14,8 @@
     1,
     5,
     0,
-    "dev",
-    0,
+    "beta",
+    1,
     __version__.split("+dev")[0],
     "dev" if "+dev" in __version__ else "final",
 )