diff --git a/CHANGES.md b/CHANGES.md
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -26,6 +26,22 @@
 User-visible changes in the hledger command line tool and library.
 
 
+# 1.52.1 2026-04-28
+
+Breaking changes
+
+- The `Gain` (`G`) account type is no longer auto-detected from account names like
+  `revenue:gains` or `income:capital gains`; it must now be declared explicitly with `; type: G`.
+  Also, the `UnrealisedGain` (`U`) account type, a subtype of Equity, has been added
+  (spellings `U`, `UnrealisedGain`, and `UnrealizedGain` are all accepted).
+  These improve compatibility between hledger 1 and 2.
+
+Docs
+
+- The "Cost basis / lot syntax" section has been renamed to "Cost basis",
+  and updated to mention hledger 2.
+
+
 # 1.52 2026-03-20
 
 Features
diff --git a/hledger.cabal b/hledger.cabal
--- a/hledger.cabal
+++ b/hledger.cabal
@@ -5,7 +5,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           hledger
-version:        1.52
+version:        1.52.1
 synopsis:       Command-line interface for the hledger accounting system
 description:    The command-line interface for the hledger accounting system.
                 Its basic function is to read a plain text file describing
@@ -151,7 +151,7 @@
   hs-source-dirs:
       ./
   ghc-options: -Wall -Wno-incomplete-uni-patterns -Wno-missing-signatures -Wno-orphans -Wno-type-defaults -Wno-unused-do-bind -optP-Wno-nonportable-include-path
-  cpp-options: -DVERSION="1.52"
+  cpp-options: -DVERSION="1.52.1"
   build-depends:
       Decimal >=0.5.1
     , Diff >=0.2
@@ -168,7 +168,7 @@
     , githash >=0.1.6.2
     , hashable >=1.2.4
     , haskeline >=0.6
-    , hledger-lib ==1.52.*
+    , hledger-lib >=1.52.1 && <1.53
     , http-client
     , http-types
     , lucid
@@ -208,7 +208,7 @@
   hs-source-dirs:
       app
   ghc-options: -Wall -Wno-incomplete-uni-patterns -Wno-missing-signatures -Wno-orphans -Wno-type-defaults -Wno-unused-do-bind -optP-Wno-nonportable-include-path -threaded -with-rtsopts=-T
-  cpp-options: -DVERSION="1.52"
+  cpp-options: -DVERSION="1.52.1"
   build-depends:
       Decimal >=0.5.1
     , aeson >=1 && <2.3
@@ -224,7 +224,7 @@
     , githash >=0.1.6.2
     , haskeline >=0.6
     , hledger
-    , hledger-lib ==1.52.*
+    , hledger-lib >=1.52.1 && <1.53
     , http-client
     , http-types
     , math-functions >=0.3.3.0
@@ -259,7 +259,7 @@
   hs-source-dirs:
       test
   ghc-options: -Wall -Wno-incomplete-uni-patterns -Wno-missing-signatures -Wno-orphans -Wno-type-defaults -Wno-unused-do-bind -optP-Wno-nonportable-include-path
-  cpp-options: -DVERSION="1.52"
+  cpp-options: -DVERSION="1.52.1"
   build-depends:
       Decimal >=0.5.1
     , aeson >=1 && <2.3
@@ -275,7 +275,7 @@
     , githash >=0.1.6.2
     , haskeline >=0.6
     , hledger
-    , hledger-lib ==1.52.*
+    , hledger-lib >=1.52.1 && <1.53
     , http-client
     , http-types
     , math-functions >=0.3.3.0
@@ -310,7 +310,7 @@
   hs-source-dirs:
       bench
   ghc-options: -Wall -Wno-incomplete-uni-patterns -Wno-missing-signatures -Wno-orphans -Wno-type-defaults -Wno-unused-do-bind -optP-Wno-nonportable-include-path
-  cpp-options: -DVERSION="1.52"
+  cpp-options: -DVERSION="1.52.1"
   build-depends:
       Decimal >=0.5.1
     , aeson >=1 && <2.3
@@ -327,7 +327,7 @@
     , githash >=0.1.6.2
     , haskeline >=0.6
     , hledger
-    , hledger-lib ==1.52.*
+    , hledger-lib >=1.52.1 && <1.53
     , html
     , http-client
     , http-types