diff --git a/hledger-lib/hledger-lib.cabal b/hledger-lib/hledger-lib.cabal
index 3dcc8615f..1ee7dd030 100644
--- a/hledger-lib/hledger-lib.cabal
+++ b/hledger-lib/hledger-lib.cabal
@@ -2,7 +2,7 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: bdd44830833c0a5bac9f94905672abc6917c2763aa43b4ae8728bcc5cbc7354f
+-- hash: 913977a3410f2e7d14c8fe2afc48653b63e94ae87061e72bdd229ee59ec567e3
 
 name:           hledger-lib
 version:        1.4.99
@@ -71,7 +71,7 @@ library
     , extra
     , filepath
     , hashtables >=1.2
-    , megaparsec >=5.0 && <6.4
+    , megaparsec >=5.0 && <6.5
     , mtl
     , mtl-compat
     , old-time
@@ -162,7 +162,7 @@ test-suite doctests
     , extra
     , filepath
     , hashtables >=1.2
-    , megaparsec >=5.0 && <6.4
+    , megaparsec >=5.0 && <6.5
     , mtl
     , mtl-compat
     , old-time
@@ -251,7 +251,7 @@ test-suite hunittests
     , filepath
     , hashtables >=1.2
     , hledger-lib
-    , megaparsec >=5.0 && <6.4
+    , megaparsec >=5.0 && <6.5
     , mtl
     , mtl-compat
     , old-time
diff --git a/hledger-lib/package.yaml b/hledger-lib/package.yaml
index 068a9dba7..6806ff11e 100644
--- a/hledger-lib/package.yaml
+++ b/hledger-lib/package.yaml
@@ -54,7 +54,7 @@ dependencies:
 - directory
 - filepath
 - hashtables >= 1.2
-- megaparsec >=5.0 && < 6.4
+- megaparsec >=5.0 && < 6.5
 - mtl
 - mtl-compat
 - old-time
diff --git a/hledger-ui/hledger-ui.cabal b/hledger-ui/hledger-ui.cabal
index 47244773c..f7bcb63af 100644
--- a/hledger-ui/hledger-ui.cabal
+++ b/hledger-ui/hledger-ui.cabal
@@ -2,7 +2,7 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: dc5f97f576101ba1c8e4bc80d0a556ff8131ba3ca1a10315504dbcded1664f70
+-- hash: da9e01e1f9d9e6d8d2f8542c24ecd91250502befeb2de9cf854fbaf4043410ff
 
 name:           hledger-ui
 version:        1.4.99
@@ -67,7 +67,7 @@ executable hledger-ui
     , fsnotify >=0.2 && <0.3
     , hledger >=1.4.99 && <1.5
     , hledger-lib >=1.4.99 && <1.5
-    , megaparsec >=5.0 && <6.4
+    , megaparsec >=5.0 && <6.5
     , microlens >=0.4 && <0.5
     , microlens-platform >=0.2.3.1 && <0.4
     , pretty-show >=1.6.4
diff --git a/hledger-ui/package.yaml b/hledger-ui/package.yaml
index 2ee426701..c38f61095 100644
--- a/hledger-ui/package.yaml
+++ b/hledger-ui/package.yaml
@@ -55,7 +55,7 @@ dependencies:
  - HUnit
  - microlens >= 0.4 && < 0.5
  - microlens-platform >= 0.2.3.1 && < 0.4
- - megaparsec >=5.0 && < 6.4
+ - megaparsec >=5.0 && < 6.5
  - pretty-show >=1.6.4
  - process >= 1.2
  - safe >= 0.2
diff --git a/hledger-web/hledger-web.cabal b/hledger-web/hledger-web.cabal
index 411488722..f48bdd655 100644
--- a/hledger-web/hledger-web.cabal
+++ b/hledger-web/hledger-web.cabal
@@ -2,7 +2,7 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: e44d6ce1b41bd59cebb67a6f567178cd7fdef2396dd1debf0c5c1e9635233736
+-- hash: 26ee8150273be2220a86a3d59474acfc963116819ed9cdf7ab790fcf237a7de7
 
 name:           hledger-web
 version:        1.4.99
@@ -144,7 +144,7 @@ library
     , http-client
     , http-conduit
     , json
-    , megaparsec >=5.0 && <6.4
+    , megaparsec >=5.0 && <6.5
     , mtl
     , parsec >=3
     , safe >=0.2
@@ -213,7 +213,7 @@ executable hledger-web
     , http-client
     , http-conduit
     , json
-    , megaparsec >=5.0 && <6.4
+    , megaparsec >=5.0 && <6.5
     , mtl
     , parsec >=3
     , safe >=0.2
@@ -271,7 +271,7 @@ test-suite test
     , http-client
     , http-conduit
     , json
-    , megaparsec >=5.0 && <6.4
+    , megaparsec >=5.0 && <6.5
     , mtl
     , parsec >=3
     , safe >=0.2
diff --git a/hledger-web/package.yaml b/hledger-web/package.yaml
index 8cc350864..e2dd3b040 100644
--- a/hledger-web/package.yaml
+++ b/hledger-web/package.yaml
@@ -95,7 +95,7 @@ dependencies:
 - yesod-form
 - yesod-static
 - json
-- megaparsec >=5.0 && < 6.4
+- megaparsec >=5.0 && < 6.5
 - mtl
 - parsec >=3
 
diff --git a/hledger/hledger.cabal b/hledger/hledger.cabal
index eaae680a7..029fb1686 100644
--- a/hledger/hledger.cabal
+++ b/hledger/hledger.cabal
@@ -2,7 +2,7 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: e232af253d6641d81ef338fafe4b1504338315aeb389ff754364dae119e04f53
+-- hash: 3367f2d53cbdb8bef95eb615437a6c778497043b784b5eed1c0a3eaf7d4cdf5b
 
 name:           hledger
 version:        1.4.99
@@ -97,7 +97,7 @@ library
     , haskeline >=0.6 && <=0.8
     , here
     , hledger-lib >=1.4.99 && <1.5
-    , megaparsec >=5.0 && <6.4
+    , megaparsec >=5.0 && <6.5
     , mtl
     , mtl-compat
     , old-time
diff --git a/hledger/package.yaml b/hledger/package.yaml
index 436784dd8..fb72e750a 100644
--- a/hledger/package.yaml
+++ b/hledger/package.yaml
@@ -141,7 +141,7 @@ library:
   - mtl
   - mtl-compat
   - old-time
-  - megaparsec >=5.0 && < 6.4
+  - megaparsec >=5.0 && < 6.5
   - regex-tdfa
   - safe >=0.2
   - split >=0.1 && <0.3