diff --git a/Project.toml b/Project.toml
index ecb703954..a5214b4bf 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "Compat"
 uuid = "34da2185-b29b-5c13-b0c7-acf172513d20"
-version = "4.0.0-dev"
+version = "4.0.0"
 
 [deps]
 Dates = "ade2ca70-3891-5945-98fb-dc099432e06a"