diff --git a/Hastructure.cabal b/Hastructure.cabal
--- a/Hastructure.cabal
+++ b/Hastructure.cabal
@@ -5,10 +5,10 @@
 -- see: https://github.com/sol/hpack
 
 name:           Hastructure
-version:        0.45.0
+version:        0.45.1
 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
+category:       StructuredFinance,Securitisation,Cashflow
 homepage:       https://github.com/yellowbean/Hastructure#readme
 bug-reports:    https://github.com/yellowbean/Hastructure/issues
 author:         Xiaoyu
@@ -76,11 +76,11 @@
       src
   build-depends:
     Decimal >= 0.5.2 && < 0.6,
-    base >= 4.19.2 && < 4.20,
+    base >= 4.18.0 && < 4.20,
     deepseq >= 1.5.1 && < 1.6,
     MissingH >= 1.6.0 && < 1.7,
     containers >= 0.6.8 && < 0.7,
-    template-haskell >= 2.21.0 && < 2.22,
+    template-haskell >= 2.20.0 && < 2.22,
     bytestring >= 0.12.1 && < 0.13,
     exceptions >= 0.10.7 && < 0.11,
     mtl >= 2.3.1 && < 2.4,
@@ -133,8 +133,9 @@
       app
   ghc-options: -threaded -rtsopts -with-rtsopts=-N
   build-depends:
+    Hastructure,
     Decimal,
-    base >= 4.19.2 && < 4.20,
+    base >= 4.18.0 && < 4.20,
     deepseq,
     MissingH,
     containers,
@@ -215,7 +216,7 @@
   build-depends:
     Hastructure,
     Decimal,
-    base >= 4.19.2 && < 4.20,
+    base >= 4.18.0 && < 4.20,
     deepseq,
     MissingH,
     containers,
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 [![Actions Status](https://github.com/yellowbean/Hastructure/workflows/Haskell%20CI/badge.svg)](https://github.com/yellowbean/Hastructure/actions)
 [![Docker Build](https://img.shields.io/docker/v/yellowbean/hastructure?color=green&label=docker)](https://hub.docker.com/r/yellowbean/hastructure)
 [![Pulls from DockerHub](https://img.shields.io/docker/pulls/yellowbean/hastructure.svg)](https://hub.docker.com/r/yellowbean/hastructure)
+![Hackage Version](https://img.shields.io/hackage/v/Hastructure)
 
 
 # What is Hastructure ?