diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -56,3 +56,8 @@
 
 * Eigth version. Fixed issues with wrong mapping. Some code improvements. Added also the properties with linear
 weighted functions.
+
+## 0.8.1.0 -- 2021-08-24
+
+* Eigth version. Switched to the new version of the phonetic-languages-rhythmicity that fixed the issues with
+custom user defined new polyrhythmicity choices.
diff --git a/phonetic-languages-simplified-properties-array.cabal b/phonetic-languages-simplified-properties-array.cabal
--- a/phonetic-languages-simplified-properties-array.cabal
+++ b/phonetic-languages-simplified-properties-array.cabal
@@ -2,7 +2,7 @@
 -- For further documentation, see http://haskell.org/cabal/users-guide/
 
 name:                phonetic-languages-simplified-properties-array
-version:             0.8.0.0
+version:             0.8.1.0
 synopsis:            A generalization of the uniqueness-periods-vector-properties package.
 description:         Is a simplified version of the functionality of the former one. Uses lists and arrays as main processment data types. Uses Double whenever applicable.
 homepage:            https://hackage.haskell.org/package/phonetic-languages-simplified-properties-array
@@ -20,6 +20,6 @@
   exposed-modules:     Phonetic.Languages.Array.Ukrainian.PropertiesFuncRepG2, Phonetic.Languages.Array.Ukrainian.PropertiesSyllablesG2
   -- other-modules:
   other-extensions:    BangPatterns, CPP, MultiWayIf
-  build-depends:       base >=4.8 && <4.15, phonetic-languages-rhythmicity >=0.9 && <1, phonetic-languages-simplified-base >=0.1 && <1, ukrainian-phonetics-basic-array >=0.1.2 && <1
+  build-depends:       base >=4.8 && <4.15, phonetic-languages-rhythmicity >=0.9.1 && <1, phonetic-languages-simplified-base >=0.1 && <1, ukrainian-phonetics-basic-array >=0.1.2 && <1
   -- hs-source-dirs:
   default-language:    Haskell2010