diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,14 @@
 
 ## [Unreleased]
 
+## [baikai-effectful 0.4.0.2] - 2026-09-15
+
+### Changed (dependencies)
+
+- Requires `effectful-core ^>=2.7` (was `^>=2.6`). No API change: none of the
+  2.7 breaking APIs (`LocalEnv`'s second type parameter, `SharedSuffix`,
+  `KnownEffects`, the ticked strict modules) are used.
+
 ## [baikai 0.7.0.0] - 2026-09-08
 
 ### Added
diff --git a/baikai-effectful.cabal b/baikai-effectful.cabal
--- a/baikai-effectful.cabal
+++ b/baikai-effectful.cabal
@@ -1,6 +1,6 @@
 cabal-version:   3.4
 name:            baikai-effectful
-version:         0.4.0.1
+version:         0.4.0.2
 synopsis:        effectful binding for the baikai AI-provider transport
 description:
   A thin, policy-free effectful binding over baikai's transport. Provides the dynamic
@@ -55,7 +55,7 @@
   build-depends:
     , baikai          ^>=0.7.0
     , base            >=4.20   && <5
-    , effectful-core  ^>=2.6
+    , effectful-core  ^>=2.7
     , streamly-core   >=0.3    && <0.5
     , text            ^>=2.1
     , vector          ^>=0.13