diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -29,3 +29,8 @@
 ## 0.5.2.0 -- 2021-09-04
 
 * Fifth version revised B. Added a new function that is simpler in usage and is sufficient.
+
+## 0.5.3.0 -- 2021-10-01
+
+* Fifth version revised C. Fixed issue with the negative second number in the 
+conversion function. 
diff --git a/Interpreter/StringConversion.hs b/Interpreter/StringConversion.hs
--- a/Interpreter/StringConversion.hs
+++ b/Interpreter/StringConversion.hs
@@ -25,7 +25,7 @@
  | null contrs = xs
  | null . words $ xs = xs
  | case filter (\y -> isDigit y || y == '/' || y == '-') contrs of { a:'/':bs -> a /= '/' && a /= '0' ; ~rrr -> False } =
-     let ys = filter (\y -> isDigit y || y == '/') contrs in
+     let ys = filter (\y -> isDigit y || y == '/' || y == '-') contrs in
        case ys of
          ~a:'/':bs -> let wordsN = words xs
                           wordN = min (fromMaybe 1 (readMaybe [a]::Maybe Int)) (length wordsN)
diff --git a/string-interpreter.cabal b/string-interpreter.cabal
--- a/string-interpreter.cabal
+++ b/string-interpreter.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                string-interpreter
-version:             0.5.2.0
+version:             0.5.3.0
 synopsis:            Is used in the phonetic languages approach (e. g. in the recursive mode).
 description:         A library that has commonly used functions for the phonetic-languages implementations that deals with String data.
 homepage:            https://hackage.haskell.org/package/string-interpreter