diff --git a/salak-yaml.cabal b/salak-yaml.cabal
--- a/salak-yaml.cabal
+++ b/salak-yaml.cabal
@@ -1,6 +1,6 @@
 cabal-version: 1.12
 name: salak-yaml
-version: 0.2.9.1
+version: 0.2.9.2
 license: BSD3
 license-file: LICENSE
 copyright: (c) 2018 Daniel YU
@@ -26,7 +26,6 @@
         base >=4.10 && <5,
         conduit >=1.3.1.1 && <1.4,
         libyaml >=0.1.1.0 && <0.2,
-        mtl >=2.2.2 && <2.3,
         salak ==0.2.9.*,
         text >=1.2.3.1 && <1.3