diff --git a/effectful-core/CHANGELOG.md b/effectful-core/CHANGELOG.md
index 353a899..f81b570 100644
--- a/effectful-core/CHANGELOG.md
+++ b/effectful-core/CHANGELOG.md
@@ -1,4 +1,4 @@
-# effectful-core-2.4.0.0 (????-??-??)
+# effectful-core-2.4.0.0 (2024-10-08)
 * Add utility functions for handling effects that take the effect handler as the
   last parameter to `Effectful.Dispatch.Dynamic`.
 * Add utility functions for handling first order effects to
diff --git a/effectful-plugin/CHANGELOG.md b/effectful-plugin/CHANGELOG.md
index d3a1a17..a01ed4a 100644
--- a/effectful-plugin/CHANGELOG.md
+++ b/effectful-plugin/CHANGELOG.md
@@ -1,4 +1,4 @@
-# effectful-plugin-1.1.0.4 (2024-??-??)
+# effectful-plugin-1.1.0.4 (2024-10-08)
 * Fix inference in presence of implicit parameters.
 
 # effectful-plugin-1.1.0.3 (2024-06-07)
diff --git a/effectful-th/CHANGELOG.md b/effectful-th/CHANGELOG.md
index 12cbdde..dab7289 100644
--- a/effectful-th/CHANGELOG.md
+++ b/effectful-th/CHANGELOG.md
@@ -1,4 +1,4 @@
-# effectful-th-1.0.0.3 (2024-??-??)
+# effectful-th-1.0.0.3 (2024-10-08)
 * Make `makeEffect` reuse Haddock descriptions of effect operations for
   corresponding functions it generates (GHC >= 9.2).
 
diff --git a/effectful/CHANGELOG.md b/effectful/CHANGELOG.md
index a2f33bb..324a42d 100644
--- a/effectful/CHANGELOG.md
+++ b/effectful/CHANGELOG.md
@@ -1,4 +1,4 @@
-# effectful-2.4.0.0 (????-??-??)
+# effectful-2.4.0.0 (2024-10-08)
 * Add utility functions for handling effects that take the effect handler as the
   last parameter to `Effectful.Dispatch.Dynamic`.
 * Add utility functions for handling first order effects to