diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 0.5.1.2 — 2026-09-18
+
+### Other Changes
+
+* The test-suite now requires `ephemeral-pg >=0.3.1 && <0.4` (was
+  `>=0.2 && <0.3`). The library's dependencies, API and runtime behavior are
+  unchanged.
+
 ## 0.5.1.1 — 2026-08-16
 
 ### Other Changes
diff --git a/shibuya-kiroku-adapter.cabal b/shibuya-kiroku-adapter.cabal
--- a/shibuya-kiroku-adapter.cabal
+++ b/shibuya-kiroku-adapter.cabal
@@ -1,6 +1,6 @@
 cabal-version:   3.0
 name:            shibuya-kiroku-adapter
-version:         0.5.1.1
+version:         0.5.1.2
 synopsis:
   Kiroku event store adapter for the Shibuya queue processing framework
 
@@ -67,25 +67,25 @@
   hs-source-dirs: test
   ghc-options:    -threaded -rtsopts -with-rtsopts=-N
   build-depends:
-    , aeson                   >=2.1  && <2.3
-    , base                    >=4.18 && <5
-    , containers              >=0.6  && <0.8
+    , aeson                   >=2.1   && <2.3
+    , base                    >=4.18  && <5
+    , containers              >=0.6   && <0.8
     , directory
-    , effectful               >=2.4  && <2.7
-    , ephemeral-pg            >=0.2  && <0.3
-    , generic-lens            >=2.2  && <2.4
-    , hasql                   >=1.10 && <1.11
-    , hasql-pool              >=1.2  && <1.5
+    , effectful               >=2.4   && <2.7
+    , ephemeral-pg            >=0.3.1 && <0.4
+    , generic-lens            >=2.2   && <2.4
+    , hasql                   >=1.10  && <1.11
+    , hasql-pool              >=1.2   && <1.5
     , hs-opentelemetry-api    ^>=1.0
-    , hspec                   >=2.10 && <2.12
+    , hspec                   >=2.10  && <2.12
     , kiroku-store            ^>=0.8
     , kiroku-test-support
-    , lens                    >=5.2  && <5.4
-    , shibuya-core            >=0.9  && <0.10
+    , lens                    >=5.2   && <5.4
+    , shibuya-core            >=0.9   && <0.10
     , shibuya-kiroku-adapter
-    , stm                     >=2.5  && <2.6
-    , streamly-core           >=0.3  && <0.4
-    , text                    >=2.0  && <2.2
-    , time                    >=1.12 && <1.15
-    , unordered-containers    >=0.2  && <0.3
-    , uuid                    >=1.3  && <1.4
+    , stm                     >=2.5   && <2.6
+    , streamly-core           >=0.3   && <0.4
+    , text                    >=2.0   && <2.2
+    , time                    >=1.12  && <1.15
+    , unordered-containers    >=0.2   && <0.3
+    , uuid                    >=1.3   && <1.4