diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -51,3 +51,7 @@
 
 * Seventh version. Added new explicit dependency (mmsyn2) that earlier was implicit. Added the opportunity to define in how many times the amplitude
 for the second lower note is greater than for the main one and to define the music intervals for the notes (if any). Some improvements for the documentation.
+
+## 0.7.1.0 -- 2020-03-10
+
+* Seventh version revised A. Fixed issue with being not compiled because of the implicit dependency being not explicitly specified.
diff --git a/dobutokO2.cabal b/dobutokO2.cabal
--- a/dobutokO2.cabal
+++ b/dobutokO2.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                dobutokO2
-version:             0.7.0.0
+version:             0.7.1.0
 synopsis:            A program and a library to create experimental music from a mono audio and a Ukrainian text
 description:         It can also create a timbre for the notes
 homepage:            https://hackage.haskell.org/package/dobutokO2
@@ -20,7 +20,7 @@
   exposed-modules:     Main, DobutokO.Sound
   -- other-modules:
   -- other-extensions:
-  build-depends:       base >=4.7 && <4.14, vector >=0.11 && <0.14, process >=1.4 && <1.8, mmsyn3 >=0.1.4 && <1, mmsyn7s >=0.6.6 && <1, directory >=1.2.5 && <1.6, mmsyn7ukr >=0.15.3 && <1, mmsyn2 >=0.1.7 && <1
+  build-depends:       base >=4.7 && <4.14, vector >=0.11 && <0.14, process >=1.4 && <1.8, mmsyn3 >=0.1.4 && <1, mmsyn7s >=0.6.6 && <1, directory >=1.2.5 && <1.6, mmsyn7ukr >=0.15.3 && <1, mmsyn2 >=0.1.7 && <1, mmsyn6ukr >=0.6.3.1 && <1
   -- hs-source-dirs:
   default-language:    Haskell2010
 
@@ -28,6 +28,6 @@
   main-is:             Main.hs
   -- other-modules:
   -- other-extensions:
-  build-depends:       base >=4.7 && <4.14, vector >=0.11 && <0.14, process >=1.4 && <1.8, mmsyn3 >=0.1.4 && <1, mmsyn7s >=0.6.6 && <1, directory >=1.2.5 && <1.6, mmsyn7ukr >=0.15.3 && <1, mmsyn2 >=0.1.7 && <1
+  build-depends:       base >=4.7 && <4.14, vector >=0.11 && <0.14, process >=1.4 && <1.8, mmsyn3 >=0.1.4 && <1, mmsyn7s >=0.6.6 && <1, directory >=1.2.5 && <1.6, mmsyn7ukr >=0.15.3 && <1, mmsyn2 >=0.1.7 && <1, mmsyn6ukr >=0.6.3.1 && <1
   -- hs-source-dirs:
   default-language:    Haskell2010