diff --git a/Hastructure.cabal b/Hastructure.cabal
--- a/Hastructure.cabal
+++ b/Hastructure.cabal
@@ -5,7 +5,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           Hastructure
-version: 0.50.3
+version: 0.50.4
 synopsis:       Cashflow modeling library for structured finance
 description:    Please see the README on GitHub at <https://github.com/yellowbean/Hastructure#readme>
 category:       StructuredFinance,Securitisation,Cashflow
@@ -78,11 +78,11 @@
       src
   build-depends:
     Decimal >= 0.5.2 && < 0.6,
-    base >= 4.18.0 && < 4.21.0,
+    base >= 4.18.0 && < 4.22.0,
     deepseq >= 1.5.0 && < 1.6,
     MissingH >= 1.6.0 && < 1.7,
     containers >= 0.6.8 && < 0.7.1,
-    template-haskell >= 2.20.0 && < 2.22.1.0,
+    template-haskell >= 2.20.0 && < 2.23.1.0,
     bytestring >= 0.12.1 && < 0.13,
     -- exceptions >= 0.10.7 && < 0.11,
     mtl >= 2.3.1 && < 2.4,
@@ -137,7 +137,7 @@
   build-depends:
     Hastructure,
     Decimal,
-    base >= 4.18.0 && < 4.21.0,
+    base,
     deepseq,
     MissingH,
     containers,
@@ -215,7 +215,7 @@
   build-depends:
     Hastructure,
     Decimal,
-    base >= 4.18.0 && < 4.21,
+    base,
     deepseq,
     MissingH,
     containers,