diff --git a/perf.cabal b/perf.cabal
--- a/perf.cabal
+++ b/perf.cabal
@@ -1,11 +1,5 @@
--- This file has been generated from package.yaml by hpack version 0.28.2.
---
--- see: https://github.com/sol/hpack
---
--- hash: 78a784f33c2ac76025b434a83e2e177b80e790432d490ecf7aebbb29f27285ee
-
 name:           perf
-version:        0.4.1.0
+version:        0.5.0.0
 synopsis:       Low-level run time measurement.
 description:     A set of tools to accurately measure time performance of Haskell programs.
                 perf aims to be lightweight by having minimal dependencies on standard libraries.
@@ -19,10 +13,9 @@
 license:        BSD3
 license-file:   LICENSE
 build-type:     Simple
-cabal-version:  >= 1.10
 extra-source-files:
     CHANGELOG.md
-    stack.yaml
+cabal-version: 2.0
 
 source-repository head
   type: git
@@ -33,13 +26,11 @@
       Perf
       Perf.Measure
       Perf.Cycle
-  other-modules:
-      Paths_perf
   hs-source-dirs:
       src
   ghc-options: -Wall -Wcompat -Wincomplete-record-updates -Wincomplete-uni-patterns -Wredundant-constraints
   build-depends:
-      base >=4.7 && <4.12
+      base >=4.7 && <5
     , containers
     , deepseq
     , foldl
@@ -52,12 +43,10 @@
 test-suite test
   type: exitcode-stdio-1.0
   main-is: test.hs
-  other-modules:
-      Paths_perf
   hs-source-dirs:
       test
   ghc-options: -Wall -Wcompat -Wincomplete-record-updates -Wincomplete-uni-patterns -Wredundant-constraints
   build-depends:
-      base >=4.7 && <4.12
+      base >=4.7 && <5
     , doctest
   default-language: Haskell2010
diff --git a/src/Perf/Measure.hs b/src/Perf/Measure.hs
--- a/src/Perf/Measure.hs
+++ b/src/Perf/Measure.hs
@@ -112,8 +112,6 @@
       t <- getCPUTime
       return $ t - a
 
-
-
 -- | a measure using 'getCurrentTime' (unit is 'NominalDiffTime' which prints as seconds)
 --
 -- >>> r <- runMeasure realtime (pure $ foldl' (+) 0 [0..1000])
diff --git a/stack.yaml b/stack.yaml
deleted file mode 100644
--- a/stack.yaml
+++ /dev/null
@@ -1,4 +0,0 @@
-resolver: nightly-2018-04-05
-
-extra-deps:
-  - rdtsc-1.3.0.1