diff --git a/eras/conway/impl/cardano-ledger-conway.cabal b/eras/conway/impl/cardano-ledger-conway.cabal
index 3b153d0dc0d..0788ca4de0a 100644
--- a/eras/conway/impl/cardano-ledger-conway.cabal
+++ b/eras/conway/impl/cardano-ledger-conway.cabal
@@ -85,7 +85,7 @@ library
         aeson >=2.2,
         data-default-class,
         cardano-crypto-class,
-        cardano-data >=1.2.1,
+        cardano-data >=1.2.3,
         cardano-ledger-binary >=1.3.2,
         cardano-ledger-allegra ^>=1.5,
         cardano-ledger-alonzo ^>=1.10,
diff --git a/libs/cardano-data/CHANGELOG.md b/libs/cardano-data/CHANGELOG.md
index 374639b340b..9c56061a54a 100644
--- a/libs/cardano-data/CHANGELOG.md
+++ b/libs/cardano-data/CHANGELOG.md
@@ -1,8 +1,8 @@
 # Version history for `cardano-data`
 
-## 1.2.2.1
+## 1.2.3.0
 
-*
+* Add `mapUnsafe`
 
 ## 1.2.2.0
 
diff --git a/libs/cardano-data/cardano-data.cabal b/libs/cardano-data/cardano-data.cabal
index 66aaf3fd3b5..133c18dc961 100644
--- a/libs/cardano-data/cardano-data.cabal
+++ b/libs/cardano-data/cardano-data.cabal
@@ -1,6 +1,6 @@
 cabal-version:      3.0
 name:               cardano-data
-version:            1.2.2.0
+version:            1.2.3.0
 license:            Apache-2.0
 maintainer:         operations@iohk.io
 author:             IOHK