diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,14 @@
 
 ## Unreleased
 
+## 0.2.1.1 - 2026-07-20
+
+### Changed
+
+- Widened the `generic-lens` bound to `>=2.2 && <2.4` (admits 2.3) and upgraded
+  the test suite's `baikai` dependency to the `0.4` series (`>=0.4 && <0.5`).
+  Dependency bounds only — no changes to the exported API.
+
 ## 0.2.1.0 - 2026-07-05
 
 ### Added
diff --git a/shikumi-optimize.cabal b/shikumi-optimize.cabal
--- a/shikumi-optimize.cabal
+++ b/shikumi-optimize.cabal
@@ -1,6 +1,6 @@
 cabal-version:   3.4
 name:            shikumi-optimize
-version:         0.2.1.0
+version:         0.2.1.1
 synopsis:        The optimizer framework for shikumi LM programs (EP-10)
 category:        AI
 description:
@@ -64,7 +64,7 @@
     , base             >=4.20     && <5
     , containers
     , effectful
-    , generic-lens     ^>=2.2
+    , generic-lens     >=2.2      && <2.4
     , lens             ^>=5.3
     , shikumi          ^>=0.3.0.0
     , shikumi-compile  ^>=0.2.0.0
@@ -98,7 +98,7 @@
 
   build-depends:
     , aeson
-    , baikai            >=0.3      && <0.4
+    , baikai            >=0.4      && <0.5
     , base
     , containers
     , effectful