diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog for `notion-client-effectful`
 
+## 0.3.0.0 - 2026-10-12
+
+### Breaking Changes
+
+* Requires `notion-client >=0.9 && <0.10`. Core `RelationValue` gains a trailing `Maybe Bool` for response completeness: migrate patterns to `RelationValue pid refs hasMore` and manual write values to `RelationValue pid refs Nothing`. The `relationValue` smart constructor keeps its signature.
+* Response exports can use core `propertyValueResponseJSON` and `pageResponseJSON`. These pure helpers require no new effect operations; `Methods` and the interpreter remain aligned.
+
 ## 0.2.0.0 - 2026-09-15
 
 ### Breaking Changes
diff --git a/notion-client-effectful.cabal b/notion-client-effectful.cabal
--- a/notion-client-effectful.cabal
+++ b/notion-client-effectful.cabal
@@ -1,6 +1,6 @@
 cabal-version: 3.4
 name: notion-client-effectful
-version: 0.2.0.0
+version: 0.3.0.0
 synopsis: Effectful effects for notion-client
 description:
   Effectful effect + default interpreter for shinzui/notion-client.
@@ -55,7 +55,7 @@
     aeson >=2.2 && <2.3,
     base >=4.18 && <5,
     effectful-core >=2.5 && <3,
-    notion-client >=0.8 && <0.9,
+    notion-client >=0.9 && <0.10,
     text >=2.0 && <2.2,
 
   hs-source-dirs: src