diff --git a/hledger-lib/hledger-lib.cabal b/hledger-lib/hledger-lib.cabal
index 230069a13..63ccb878e 100644
--- a/hledger-lib/hledger-lib.cabal
+++ b/hledger-lib/hledger-lib.cabal
@@ -123,7 +123,7 @@ library
     , aeson-pretty
     , ansi-terminal >=0.9
     , array
-    , base >=4.14 && <4.20
+    , base >=4.14 && <4.21
     , base-compat
     , blaze-html
     , blaze-markup >=0.5.1
@@ -187,7 +187,7 @@ test-suite doctest
     , aeson-pretty
     , ansi-terminal >=0.9
     , array
-    , base >=4.14 && <4.20
+    , base >=4.14 && <4.21
     , base-compat
     , blaze-html
     , blaze-markup >=0.5.1
@@ -254,7 +254,7 @@ test-suite unittest
     , aeson-pretty
     , ansi-terminal >=0.9
     , array
-    , base >=4.14 && <4.20
+    , base >=4.14 && <4.21
     , base-compat
     , blaze-html
     , blaze-markup >=0.5.1
diff --git a/hledger-ui/hledger-ui.cabal b/hledger-ui/hledger-ui.cabal
index f6045f389..4108429b4 100644
--- a/hledger-ui/hledger-ui.cabal
+++ b/hledger-ui/hledger-ui.cabal
@@ -77,7 +77,7 @@ library
   build-depends:
       ansi-terminal >=0.9
     , async
-    , base >=4.14 && <4.20
+    , base >=4.14 && <4.21
     , brick >=2.1.1 && <2.3.2 || >2.3.2 && <2.5
     , cmdargs >=0.8
     , containers >=0.5.9
@@ -125,7 +125,7 @@ executable hledger-ui
   ghc-options: -Wall -Wno-incomplete-uni-patterns -Wno-missing-signatures -Wno-orphans -Wno-type-defaults -Wno-unused-do-bind
   cpp-options: -DVERSION="1.40.99"
   build-depends:
-      base >=4.14 && <4.20
+      base >=4.14 && <4.21
     , hledger-ui
   default-language: Haskell2010
   if (flag(ghcdebug))
diff --git a/hledger-web/hledger-web.cabal b/hledger-web/hledger-web.cabal
index 8ed0b6f6f..715192088 100644
--- a/hledger-web/hledger-web.cabal
+++ b/hledger-web/hledger-web.cabal
@@ -160,7 +160,7 @@ library
   build-depends:
       Decimal >=0.5.1
     , aeson >=1 && <2.3
-    , base >=4.14 && <4.20
+    , base >=4.14 && <4.21
     , base64
     , blaze-html
     , blaze-markup
@@ -225,7 +225,7 @@ executable hledger-web
   ghc-options: -Wall -Wredundant-constraints -Wincomplete-record-updates -Wincomplete-uni-patterns
   cpp-options: -DVERSION="1.40.99"
   build-depends:
-      base >=4.14 && <4.20
+      base >=4.14 && <4.21
     , hledger-web
   default-language: Haskell2010
   if (flag(dev)) || (flag(library-only))
@@ -249,7 +249,7 @@ test-suite test
   ghc-options: -Wall -Wredundant-constraints -Wincomplete-record-updates -Wincomplete-uni-patterns
   cpp-options: -DVERSION="1.40.99"
   build-depends:
-      base >=4.14 && <4.20
+      base >=4.14 && <4.21
     , hledger-web
   default-language: Haskell2010
   if (flag(dev)) || (flag(library-only))
diff --git a/hledger/hledger.cabal b/hledger/hledger.cabal
index f0131020b..661964c75 100644
--- a/hledger/hledger.cabal
+++ b/hledger/hledger.cabal
@@ -156,7 +156,7 @@ library
     , Diff >=0.2
     , aeson >=1 && <2.3
     , ansi-terminal >=0.9
-    , base >=4.14 && <4.20
+    , base >=4.14 && <4.21
     , bytestring
     , cmdargs >=0.10
     , containers >=0.5.9
@@ -212,7 +212,7 @@ executable hledger
       Decimal >=0.5.1
     , aeson >=1 && <2.3
     , ansi-terminal >=0.9
-    , base >=4.14 && <4.20
+    , base >=4.14 && <4.21
     , bytestring
     , cmdargs >=0.10
     , containers >=0.5.9
@@ -267,7 +267,7 @@ test-suite unittest
       Decimal >=0.5.1
     , aeson >=1 && <2.3
     , ansi-terminal >=0.9
-    , base >=4.14 && <4.20
+    , base >=4.14 && <4.21
     , bytestring
     , cmdargs >=0.10
     , containers >=0.5.9
@@ -319,7 +319,7 @@ benchmark bench
       Decimal >=0.5.1
     , aeson >=1 && <2.3
     , ansi-terminal >=0.9
-    , base >=4.14 && <4.20
+    , base >=4.14 && <4.21
     , bytestring
     , cmdargs >=0.10
     , containers >=0.5.9