diff --git a/hq.cabal b/hq.cabal
--- a/hq.cabal
+++ b/hq.cabal
@@ -7,7 +7,7 @@
 -- hash: ccfecaab3d1004f03e5a9e851269c0209561044c1b9aa90d587dc93a936394f0
 
 name:           hq
-version:        0.1.0.10
+version:        0.1.0.11
 synopsis:       Quantitative Library
 category:       Finance
 description:    Please see the README on GitHub at <https://github.com/ghais/hq#readme>
@@ -189,7 +189,7 @@
       test/bachelier
   ghc-options: -threaded -rtsopts -with-rtsopts=-N
   build-depends:
-    , base >=4.7 && <5
+    , base >=4.12 && <5
     , hq
     , hspec >= 2.7
     , hspec-expectations >= 0.8
@@ -220,7 +220,7 @@
       test/normalimpliedvol
   ghc-options: -threaded -rtsopts -with-rtsopts=-N
   build-depends:
-    , base >=4.7 && <5
+    , base >=4.12 && <5
     , hq
     , hspec >= 2.7
     , hspec-expectations >= 0.8