diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 # Revision history for hierarchical-env
 
+## 0.2.0.1 -- 2021-05-08
+* Relax library dependency (`method`)
+
 ## 0.2.0.0 -- 2021-04-28
 * Change how to specify the super environment
   * Before: Specify by adding type instance for `Super env`
diff --git a/hierarchical-env.cabal b/hierarchical-env.cabal
--- a/hierarchical-env.cabal
+++ b/hierarchical-env.cabal
@@ -5,7 +5,7 @@
 -- http://haskell.org/cabal/users-guide/
 
 name:               hierarchical-env
-version:            0.2.0.0
+version:            0.2.0.1
 synopsis:           hierarchical environments for dependency injection
 description:
   This library provides scalable dependency injection for RIO monad
@@ -27,7 +27,7 @@
 common shared-properties
   build-depends:
     , base              >=4        && <5
-    , method            ^>=0.3.1.0
+    , method            >=0.3.1.0
     , microlens         ^>=0.4
     , microlens-mtl     ^>=0.2
     , microlens-th      ^>=0.4