diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 6.0.5 (2024-01-24)
+
+#### Fixed
+
+- Certain illegal versions were parsing as PVP.
+
 ## 6.0.4 (2023-12-29)
 
 #### Changed
@@ -11,7 +17,7 @@
 #### Added
 
 - `Data` instances for the various data types.
-- Simple conversion types between the main version types.
+- Simple conversion functions between the main version types.
 - Compile-time constructors via Template Haskell, like `versioningQ`.
 
 ## 6.0.2 (2023-10-12)
diff --git a/Data/Versions.hs b/Data/Versions.hs
--- a/Data/Versions.hs
+++ b/Data/Versions.hs
@@ -904,7 +904,7 @@
 
 -- | Internal megaparsec parser of `pvp`.
 pvp' :: Parsec Void Text PVP
-pvp' = L.lexeme space (PVP . NEL.fromList <$> L.decimal `sepBy` char '.')
+pvp' = L.lexeme space (PVP <$> L.decimal `PC.sepBy1` char '.')
 
 -- | Parse a (General) `Version`, as defined above.
 version :: Text -> Either ParsingError Version
diff --git a/test/Test.hs b/test/Test.hs
--- a/test/Test.hs
+++ b/test/Test.hs
@@ -31,6 +31,9 @@
 badVers :: [T.Text]
 badVers = ["", "1.2 "]
 
+badPVP :: [T.Text]
+badPVP = ["", "clc237", "abc"]
+
 messes :: [T.Text]
 messes = [ "10.2+0.93+1-1", "003.03-3", "002.000-7", "20.26.1_0-2", "1.6.0a+2014+m872b87e73dfb-1"
          , "1.3.00.16851-1", "5.2.458699.0906-1", "12.0.0-3ubuntu1~20.04.5" ]
@@ -96,6 +99,8 @@
     , testGroup "(Haskell) PVP"
       [ testGroup "Good PVPs" $
         map (\s -> testCase (T.unpack s) $ isomorphPVP s) cabalOrd
+      , testGroup "Bad PVP" $
+        map (\s -> testCase (T.unpack s) $ assertBool "A bad PVP parsed" $ isLeft $ pvp s) badPVP
       , testGroup "Comparisons" $
         zipWith (\a b -> testCase (T.unpack $ a <> " < " <> b) $ comp pvp a b) cabalOrd (tail cabalOrd)
       ]
diff --git a/versions.cabal b/versions.cabal
--- a/versions.cabal
+++ b/versions.cabal
@@ -1,6 +1,6 @@
 cabal-version:      2.2
 name:               versions
-version:            6.0.4
+version:            6.0.5
 synopsis:           Types and parsers for software version numbers.
 description:
   A library for parsing and comparing software version numbers. We like to give