diff --git a/takkyuu.cabal b/takkyuu.cabal
index 4ca46df44d5bce4343059948f90e9005e36ac850..daca4b60af5bc2a6bb31e65638207d2fda42e3f2 100644
--- a/takkyuu.cabal
+++ b/takkyuu.cabal
@@ -26,8 +26,8 @@ library
                      , Text.Takkyuu.Toolbox
                      , Text.Takkyuu.IO
   -- other-extensions:
-  build-depends:       base >=4.14 && <4.15
-                     , aeson >=1.5.6 && <1.5.7
+  build-depends:       base >=4.14 && <4.17
+                     , aeson >=1.5.6 && <2.1
                      , containers >=0.6 && <0.7
                      , mtl >=2.2 && <2.3
   hs-source-dirs:      lib
@@ -38,7 +38,8 @@ executable takkyuu
   main-is:             Main.hs
   -- other-modules:
   -- other-extensions:
-  build-depends:       base >=4.14 && <4.15, takkyuu
+  build-depends:       base
+                     , takkyuu
   hs-source-dirs:      app
   default-language:    Haskell2010
 
@@ -47,6 +48,6 @@ test-suite takkyuu-test
   type:                detailed-0.9
   hs-source-dirs:      test
   test-module:         Test
-  build-depends:       base >=4.14 && <4.15
+  build-depends:       base
                      , Cabal
                      , takkyuu