diff --git a/effectful-core/CHANGELOG.md b/effectful-core/CHANGELOG.md
index aab05e5..090f478 100644
--- a/effectful-core/CHANGELOG.md
+++ b/effectful-core/CHANGELOG.md
@@ -1,4 +1,4 @@
-# effectful-core-2.3.0.0 (2023-??-??)
+# effectful-core-2.3.0.0 (2023-09-13)
 * Deprecate `withConcEffToIO`.
 * Make `withEffToIO` take an explicit unlifting strategy for the sake of
   consistency with unlifting functions from `Effectful.Dispatch.Dynamic` and
diff --git a/effectful-plugin/CHANGELOG.md b/effectful-plugin/CHANGELOG.md
index a02e79e..cb10226 100644
--- a/effectful-plugin/CHANGELOG.md
+++ b/effectful-plugin/CHANGELOG.md
@@ -1,4 +1,4 @@
-# effectful-plugin-1.1.0.2 (2023-??-??)
+# effectful-plugin-1.1.0.2 (2023-09-13)
 * Add support for GHC 9.8.
 
 # effectful-plugin-1.1.0.1 (2023-03-13)
diff --git a/effectful/CHANGELOG.md b/effectful/CHANGELOG.md
index d774512..5f4660e 100644
--- a/effectful/CHANGELOG.md
+++ b/effectful/CHANGELOG.md
@@ -1,4 +1,4 @@
-# effectful-2.3.0.0 (2023-??-??)
+# effectful-2.3.0.0 (2023-09-13)
 * Deprecate `withConcEffToIO`.
 * Make `withEffToIO` take an explicit unlifting strategy for the sake of
   consistency with unlifting functions from `Effectful.Dispatch.Dynamic` and