diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,14 @@
 
 ## [Unreleased]
 
+## 0.19.0.1 — 2026-10-05
+
+### Other Changes
+
+- Admit effectful 2.7 alongside 2.6: `effectful <2.8` and
+  `effectful-core >=2.6 && <2.7 || >=2.7.1.1 && <2.8`. Exclude the
+  effectful-core 2.7.0.0–2.7.1.0 performance regression. Bounds only; no source changed.
+
 ## 0.19.0.0 — 2026-09-25
 
 ### Breaking Changes
diff --git a/keiro-test-support.cabal b/keiro-test-support.cabal
--- a/keiro-test-support.cabal
+++ b/keiro-test-support.cabal
@@ -1,6 +1,6 @@
 cabal-version: 3.0
 name: keiro-test-support
-version: 0.19.0.0
+version: 0.19.0.1
 synopsis: Shared PostgreSQL test fixtures for Keiro test suites
 description:
   Suite-level ephemeral-PostgreSQL fixtures shared by the Keiro test
@@ -54,11 +54,11 @@
     base >=4.21 && <5,
     containers >=0.6 && <0.8,
     directory >=1.3 && <1.4,
-    effectful >=2.6 && <2.7,
+    effectful >=2.6 && <2.8,
     ephemeral-pg >=0.3.1 && <0.4,
     hasql >=1.10 && <1.11,
     hasql-pool >=1.2 && <1.5,
-    keiro-migrations ^>=0.19.0.0,
+    keiro-migrations ^>=0.19.0.1,
     kiroku-store >=0.9.0.1 && <0.10,
     kiroku-store-migrations ^>=0.6.0.0,
     pg-migrate ^>=1.2.0.0,