diff --git a/library/Optima.hs b/library/Optima.hs
--- a/library/Optima.hs
+++ b/library/Optima.hs
@@ -178,6 +178,8 @@
       paramHelp description format <>
       defaultValue def
 
+-- enumValue :: Text -> Default a -> (a -> Text) -> Attoparsec.Parser a -> Param a
+
 {-|
 A parameter with no value. Fails if it's not present.
 Thus it can be composed using Alternative.
diff --git a/optima.cabal b/optima.cabal
--- a/optima.cabal
+++ b/optima.cabal
@@ -1,5 +1,5 @@
 name: optima
-version: 0.3.0.2
+version: 0.3.0.3
 category: CLI, Parsing, Options
 synopsis: Simple command line interface arguments parser
 homepage: https://github.com/metrix-ai/optima
@@ -24,7 +24,7 @@
     attoparsec ==0.13.*,
     attoparsec-data ==1.*,
     base >=4.9 && <5,
-    optparse-applicative >=0.14 && <0.15,
+    optparse-applicative >=0.15 && <0.16,
     text ==1.*,
     text-builder >=0.6 && <0.7