diff --git a/cabal.project b/cabal.project
index 88862b47810..1daf214b280 100644
--- a/cabal.project
+++ b/cabal.project
@@ -14,7 +14,7 @@ repository cardano-haskell-packages
 -- you need to run if you change them
 index-state:
   , hackage.haskell.org 2026-08-14T13:38:07Z
-  , cardano-haskell-packages 2026-09-16T23:53:07Z
+  , cardano-haskell-packages 2026-09-23T15:51:40Z
 
 constraints:
   -- haskell.nix patch does not work for 1.6.8
diff --git a/cardano-node/cardano-node.cabal b/cardano-node/cardano-node.cabal
index b41e5da82de..9627995a29a 100644
--- a/cardano-node/cardano-node.cabal
+++ b/cardano-node/cardano-node.cabal
@@ -142,7 +142,7 @@ library
                       , cardano-ledger-allegra >= 1.10.1
                       , cardano-ledger-api
                       , cardano-ledger-babbage
-                      , cardano-ledger-binary >= 1.7.1
+                      , cardano-ledger-binary >= 1.9.1.0
                       , cardano-ledger-byron
                       , cardano-ledger-conway >= 1.22.1.0
                       , cardano-ledger-core
diff --git a/flake.lock b/flake.lock
index 1d0cf7d6116..b2dfcd0e82e 100644
--- a/flake.lock
+++ b/flake.lock
@@ -3,11 +3,11 @@
     "CHaP": {
       "flake": false,
       "locked": {
-        "lastModified": 1789604756,
-        "narHash": "sha256-65Tjhgm7StVkrek4aq8pvJ+OGkgREMFRFoIeXzyJyf4=",
+        "lastModified": 1790181316,
+        "narHash": "sha256-rb95SeaH+kXmNObcCFiOMG/gSLv4YIWAeP+WJhnmN1Y=",
         "owner": "intersectmbo",
         "repo": "cardano-haskell-packages",
-        "rev": "24dc50911743edb8dc5389f177385ed19ec6519a",
+        "rev": "79590a81df64bbd15293b3d5dbe330a688f1d14d",
         "type": "github"
       },
       "original": {