diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 ## Unreleased
 
+## 0.1.3.1 — 2026-10-05
+
+- Tighten the `hasql` bound to `>=1.10 && <1.11`, matching the rest of the cohort (`mori://shinzui/keiro`, `mori://shinzui/kiroku`, `mori://shinzui/ephemeral-pg`). The old `>=1.9` floor was wrong: the backend already uses the 1.10-only API (`preparable`/`unpreparable`, `Hasql.Connection.Settings`). The test suite now bounds `mori://shinzui/ephemeral-pg/packages/ephemeral-pg` at `^>=0.3.1.0`. Bounds only; no source changed.
+
+- Move the dependency on `mori://shinzui/baikai/packages/baikai` to `>=0.7.1.0 && <0.8` and widen the `effectful` bound to `>=2.6 && <2.8`, so both effectful 2.6 and 2.7 are supported (effectful 2.7 needs `baikai-effectful` 0.4.0.2, effectful 2.6 needs 0.4.0.1). Bounds only; no source changed.
+
 ## 0.1.3.0 — 2026-09-08
 
 - Raise the internal `shikumi-cache` bound to `^>=0.2.0.0` for the breaking cache release.
diff --git a/shikumi-cache-postgres.cabal b/shikumi-cache-postgres.cabal
--- a/shikumi-cache-postgres.cabal
+++ b/shikumi-cache-postgres.cabal
@@ -1,8 +1,8 @@
-cabal-version:   3.4
-name:            shikumi-cache-postgres
-version:         0.1.3.0
-synopsis:        Postgres-backed shikumi cache (EP-6)
-category:        AI
+cabal-version: 3.4
+name: shikumi-cache-postgres
+version: 0.1.3.1
+synopsis: Postgres-backed shikumi cache (EP-6)
+category: AI
 description:
   A PostgreSQL backend for shikumi's @Cache@ effect (EP-6), in a separate
   package so the @hasql@ client (and libpq) is only pulled in when used. Entries
@@ -12,20 +12,26 @@
   @Shikumi.Cache.ResponseJSON@). The test uses @ephemeral-pg@ to spin up a
   throwaway server, so it needs no external database.
 
-license:         BSD-3-Clause
-author:          Nadeem Bitar
-maintainer:      nadeem@gmail.com
-build-type:      Simple
+license: BSD-3-Clause
+author: Nadeem Bitar
+maintainer: nadeem@gmail.com
+build-type: Simple
 extra-doc-files: CHANGELOG.md
 
 common common-options
   ghc-options:
-    -Wall -Wcompat -Widentities -Wincomplete-uni-patterns
-    -Wincomplete-record-updates -Wredundant-constraints
-    -fhide-source-paths -Wmissing-export-lists -Wpartial-fields
+    -Wall
+    -Wcompat
+    -Widentities
+    -Wincomplete-uni-patterns
+    -Wincomplete-record-updates
+    -Wredundant-constraints
+    -fhide-source-paths
+    -Wmissing-export-lists
+    -Wpartial-fields
     -Wmissing-deriving-strategies
 
-  default-language:   GHC2024
+  default-language: GHC2024
   default-extensions:
     DeriveAnyClass
     DuplicateRecordFields
@@ -34,35 +40,38 @@
     OverloadedStrings
 
 library
-  import:          common-options
-  hs-source-dirs:  src
+  import: common-options
+  hs-source-dirs: src
   exposed-modules: Shikumi.Cache.Backend.Postgres
   build-depends:
-    , aeson          >=2.2      && <2.3
-    , base           >=4.20     && <5
-    , effectful      >=2.5      && <2.7
-    , hasql          >=1.9      && <1.11
-    , shikumi-cache  ^>=0.2.0.0
-    , text           ^>=2.1
+    aeson >=2.2 && <2.3,
+    base >=4.20 && <5,
+    effectful >=2.6 && <2.8,
+    hasql >=1.10 && <1.11,
+    shikumi-cache ^>=0.2.0.1,
+    text ^>=2.1,
 
 test-suite shikumi-cache-postgres-test
-  import:         common-options
-  type:           exitcode-stdio-1.0
+  import: common-options
+  type: exitcode-stdio-1.0
   hs-source-dirs: test
-  main-is:        Main.hs
-  ghc-options:    -threaded -with-rtsopts=-N
+  main-is: Main.hs
+  ghc-options:
+    -threaded
+    -with-rtsopts=-N
+
   build-depends:
-    , baikai                  >=0.7.0.0  && <0.8
-    , base
-    , effectful
-    , ephemeral-pg
-    , generic-lens
-    , lens
-    , shikumi                 ^>=0.4.0.0
-    , shikumi-cache           ^>=0.2.0.0
-    , shikumi-cache-postgres  ^>=0.1.3.0
-    , tasty
-    , tasty-hunit
-    , text
-    , time
-    , vector
+    baikai >=0.7.1.0 && <0.8,
+    base,
+    effectful,
+    ephemeral-pg ^>=0.3.1.0,
+    generic-lens,
+    lens,
+    shikumi ^>=0.4.0.0,
+    shikumi-cache ^>=0.2.0.1,
+    shikumi-cache-postgres ^>=0.1.3.1,
+    tasty,
+    tasty-hunit,
+    text,
+    time,
+    vector,
diff --git a/src/Shikumi/Cache/Backend/Postgres.hs b/src/Shikumi/Cache/Backend/Postgres.hs
--- a/src/Shikumi/Cache/Backend/Postgres.hs
+++ b/src/Shikumi/Cache/Backend/Postgres.hs
@@ -5,7 +5,7 @@
 -- server, but it persists entries in a @jsonb@ column rather than an evicting
 -- key-value store, so entries live until explicitly removed or the policy layer
 -- treats them as expired via 'Shikumi.Cache.CacheConfig'. The value column holds
--- the JSON of a 'CachedResponse' (the baikai 'Baikai.Response.Response'
+-- the JSON of a t'Shikumi.Cache.Types.CachedResponse' (the baikai 'Baikai.Response.Response'
 -- round-trip is @shikumi-cache@'s "Shikumi.Cache.ResponseJSON"). Access goes
 -- through @hasql@; the single 'Connection' is guarded by an 'MVar' so the
 -- 'Cache' effect's lookups and stores are serialized.