diff --git a/hledger-lib/hledger-lib.cabal b/hledger-lib/hledger-lib.cabal
index e5e594c80..c1b29af34 100644
--- a/hledger-lib/hledger-lib.cabal
+++ b/hledger-lib/hledger-lib.cabal
@@ -72,7 +72,7 @@ library
     , directory
     , filepath
     , hashtables >= 1.2
-    , megaparsec >=5.0 && < 5.3
+    , megaparsec >=5.0 && < 5.4
     , mtl
     , mtl-compat
     , old-time
@@ -168,7 +168,7 @@ test-suite doctests
     , directory
     , filepath
     , hashtables >= 1.2
-    , megaparsec >=5.0 && < 5.3
+    , megaparsec >=5.0 && < 5.4
     , mtl
     , mtl-compat
     , old-time
@@ -255,7 +255,7 @@ test-suite hunittests
     , directory
     , filepath
     , hashtables >= 1.2
-    , megaparsec >=5.0 && < 5.3
+    , megaparsec >=5.0 && < 5.4
     , mtl
     , mtl-compat
     , old-time
diff --git a/hledger-lib/package.yaml b/hledger-lib/package.yaml
index 7696f87f6..6b0603794 100644
--- a/hledger-lib/package.yaml
+++ b/hledger-lib/package.yaml
@@ -54,7 +54,7 @@ dependencies:
 - directory
 - filepath
 - hashtables >= 1.2
-- megaparsec >=5.0 && < 5.3
+- megaparsec >=5.0 && < 5.4
 - mtl
 - mtl-compat
 - old-time
diff --git a/hledger-ui/hledger-ui.cabal b/hledger-ui/hledger-ui.cabal
index 1e8b02b5b..721789217 100644
--- a/hledger-ui/hledger-ui.cabal
+++ b/hledger-ui/hledger-ui.cabal
@@ -72,7 +72,7 @@ executable hledger-ui
     , HUnit
     , microlens >= 0.4 && < 0.5
     , microlens-platform >= 0.2.3.1 && < 0.4
-    , megaparsec >=5.0 && < 5.3
+    , megaparsec >=5.0 && < 5.4
     , pretty-show >=1.6.4
     , process >= 1.2
     , safe >= 0.2
diff --git a/hledger-ui/package.yaml b/hledger-ui/package.yaml
index 140f6969a..0b597151f 100644
--- a/hledger-ui/package.yaml
+++ b/hledger-ui/package.yaml
@@ -63,7 +63,7 @@ executables:
       - HUnit
       - microlens >= 0.4 && < 0.5
       - microlens-platform >= 0.2.3.1 && < 0.4
-      - megaparsec >=5.0 && < 5.3
+      - megaparsec >=5.0 && < 5.4
       - 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 be22d110d..27a6c08e9 100644
--- a/hledger-web/hledger-web.cabal
+++ b/hledger-web/hledger-web.cabal
@@ -159,7 +159,7 @@ library
     , yesod-form
     , yesod-static
     , json
-    , megaparsec >=5.0 && < 5.3
+    , megaparsec >=5.0 && < 5.4
     , mtl
   if (flag(dev)) || (flag(library-only))
     cpp-options: -DDEVELOPMENT
diff --git a/hledger-web/package.yaml b/hledger-web/package.yaml
index 63a857672..ff4d139bc 100644
--- a/hledger-web/package.yaml
+++ b/hledger-web/package.yaml
@@ -119,7 +119,7 @@ library:
   - Settings.Development
   - Settings.StaticFiles
   dependencies:
-  - megaparsec >=5.0 && < 5.3
+  - megaparsec >=5.0 && < 5.4
   - mtl
   when:
   - condition: (flag(dev)) || (flag(library-only))
diff --git a/hledger/hledger.cabal b/hledger/hledger.cabal
index 4593ef6a0..d71e17d0a 100644
--- a/hledger/hledger.cabal
+++ b/hledger/hledger.cabal
@@ -106,7 +106,7 @@ library
     , mtl
     , mtl-compat
     , old-time
-    , megaparsec >=5.0 && < 5.3
+    , megaparsec >=5.0 && < 5.4
     , regex-tdfa
     , safe >=0.2
     , split >=0.1 && <0.3
diff --git a/hledger/package.yaml b/hledger/package.yaml
index fc844aba5..627bbf72b 100644
--- a/hledger/package.yaml
+++ b/hledger/package.yaml
@@ -120,7 +120,7 @@ library:
   - mtl
   - mtl-compat
   - old-time
-  - megaparsec >=5.0 && < 5.3
+  - megaparsec >=5.0 && < 5.4
   - regex-tdfa
   - safe >=0.2
   - split >=0.1 && <0.3