diff --git a/git-config.cabal b/git-config.cabal
--- a/git-config.cabal
+++ b/git-config.cabal
@@ -1,11 +1,13 @@
--- This file has been generated from package.yaml by hpack version 0.20.0.
+cabal-version: 1.12
+
+-- This file has been generated from package.yaml by hpack version 0.31.2.
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 0aca7139a8c14002852a9afd277d50d4d9a76b6740a53a8bff57f37d8d70c611
+-- hash: 0f49020a8cdb5c1fe3c4e47e6cb7ac3faa25db36208c7e09265b20c9769c645b
 
 name:           git-config
-version:        0.1.1
+version:        0.1.2
 synopsis:       A simple parser for Git configuration files
 description:    git-config is a simple 'megaparsec' parser for Git configuration files.
                 .
@@ -32,8 +34,6 @@
 license:        BSD3
 license-file:   LICENSE
 build-type:     Simple
-cabal-version:  >= 1.10
-
 extra-source-files:
     README.md
 
@@ -48,7 +48,7 @@
   ghc-options: -Wall -fno-warn-partial-type-signatures -fno-warn-name-shadowing -fwarn-tabs -fwarn-unused-imports -fwarn-missing-signatures -fwarn-incomplete-patterns
   build-depends:
       base >=4.7 && <5
-    , megaparsec
+    , megaparsec >=7 && <9
     , text
     , unordered-containers
   exposed-modules:
@@ -64,6 +64,8 @@
       test
   default-extensions: OverloadedStrings
   ghc-options: -Wall -fno-warn-partial-type-signatures -fno-warn-name-shadowing -fwarn-tabs -fwarn-unused-imports -fwarn-missing-signatures -fwarn-incomplete-patterns -threaded -rtsopts -with-rtsopts=-N
+  build-tool-depends:
+      tasty-discover:tasty-discover >=4.2.1 && <4.3
   build-depends:
       base >=4.7 && <5
     , git-config
diff --git a/src/Text/GitConfig/Parser.hs b/src/Text/GitConfig/Parser.hs
--- a/src/Text/GitConfig/Parser.hs
+++ b/src/Text/GitConfig/Parser.hs
@@ -50,15 +50,15 @@
 import           Data.Text                  (Text)
 import qualified Data.Text                  as T
 import           Data.Void                  (Void)
-import           Text.Megaparsec            (ParseError, Parsec, Token, between,
-                                             eof, many, parse, sepBy, some,
+import           Text.Megaparsec            (ParseErrorBundle, Parsec, between,
+                                             eof, many, parse, satisfy, sepBy, some,
                                              (<?>), (<|>))
 import           Text.Megaparsec.Char       (alphaNumChar, char, eol,
-                                             letterChar, printChar, satisfy,
+                                             letterChar, printChar,
                                              space1)
 import qualified Text.Megaparsec.Char.Lexer as Lexer
 
-type GitConfigError = ParseError (Token Text) Void
+type GitConfigError = ParseErrorBundle Text Void
 type Parser = Parsec Void Text
 
 data Section = Section [Text] (HashMap Text Text)
@@ -153,8 +153,9 @@
 mapping :: Parser (Text, Text)
 mapping = do
   varName <- variableName
-  void (symbol "=")
-  varValue <- variableValue
+  varValue <- do void (symbol "=")
+                 variableValue <|> pure ""
+              <|> pure "true"
   return (varName, varValue)
 
 -- | Parse a complete git config section.
diff --git a/test/Text/GitConfig/ParserTest.hs b/test/Text/GitConfig/ParserTest.hs
--- a/test/Text/GitConfig/ParserTest.hs
+++ b/test/Text/GitConfig/ParserTest.hs
@@ -110,8 +110,16 @@
     [
       testCase "valid" $
         assertSuccess $ parse P.mapping "" "key = value\n",
-      testCase "temporarily invalid boolean switch" $
-        assertFail $ parse P.mapping "" "key\n"
+      testCase "empty '= value' equals boolean true" $
+        case parse P.mapping "" "key\n" of
+          Left _ -> assertFailure ""
+          Right (_,v) ->
+            assertEqual "" "true" v
+      , testCase "empty value equals empty string" $
+          case parse P.mapping "" "key = \n" of
+            Left _ -> assertFailure ""
+            Right (_,v) ->
+              assertEqual "" "" v
     ]
 
 test_section :: TestTree