diff --git a/hledger-iadd.cabal b/hledger-iadd.cabal
index 6760cec..a06ed94 100644
--- a/hledger-iadd.cabal
+++ b/hledger-iadd.cabal
@@ -71,7 +71,7 @@ library
                      , transformers >= 0.3
                      , time >= 1.5
                      , vector
-                     , megaparsec >= 7.0 && <7.1
+                     , megaparsec >= 7.0 && <8.1
                      , containers
                      , optparse-applicative
                      , directory
@@ -102,7 +102,7 @@ executable hledger-iadd
                      , xdg-basedir
                      , unordered-containers
                      , free >= 4.12.4
-                     , megaparsec >= 7.0 && <7.1
+                     , megaparsec >= 7.0 && <8.1
   ghc-options:         -threaded -Wall -fdefer-typed-holes -fno-warn-name-shadowing
 
 test-suite spec
@@ -124,7 +124,7 @@ test-suite spec
                     , hspec
                     , QuickCheck
                     , free >= 4.12.4
-                    , megaparsec >= 7.0 && <7.1
+                    , megaparsec >= 7.0 && <8.1
                     , text-zipper >= 0.10
   build-tool-depends: hspec-discover:hspec-discover ==2.*
   ghc-options:        -threaded -Wall -fdefer-typed-holes -fno-warn-name-shadowing
diff --git a/src/ConfigParser.hs b/src/ConfigParser.hs
index 26c6a25..eb5e3a0 100644
--- a/src/ConfigParser.hs
+++ b/src/ConfigParser.hs
@@ -4,6 +4,7 @@
 {-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE GADTs, DeriveFunctor, ScopedTypeVariables #-}
+{-# LANGUAGE CPP #-}
 
 -- | Applicative config parser.
 --
@@ -283,4 +284,7 @@ parseWithStart p pos s = snd (runParser' p state)
             , pstateTabWidth = mkPos 1
             , pstateLinePrefix = ""
             }
+#if MIN_VERSION_megaparsec(8,0,0)
+          , stateParseErrors = []
+#endif
           }