diff --git a/cabal.project b/cabal.project
index 5d31bd9478..0d7e656bc1 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 2023-08-08T19:56:09Z
-  , cardano-haskell-packages 2023-10-01T12:37:02Z
+  , cardano-haskell-packages 2023-10-03T08:51:40Z
 
 packages:
   cardano-cli
diff --git a/cardano-cli/cardano-cli.cabal b/cardano-cli/cardano-cli.cabal
index 30a434b616..c4d9c22ce5 100644
--- a/cardano-cli/cardano-cli.cabal
+++ b/cardano-cli/cardano-cli.cabal
@@ -200,7 +200,7 @@ library
                       , binary
                       , bytestring
                       , canonical-json
-                      , cardano-api ^>= 8.23.1
+                      , cardano-api ^>= 8.23.2
                       , cardano-binary
                       , cardano-crypto
                       , cardano-crypto-class ^>= 2.1.2
diff --git a/cardano-cli/src/Cardano/CLI/Read.hs b/cardano-cli/src/Cardano/CLI/Read.hs
index ca5491fc8f..52c5b8be1e 100644
--- a/cardano-cli/src/Cardano/CLI/Read.hs
+++ b/cardano-cli/src/Cardano/CLI/Read.hs
@@ -619,6 +619,7 @@ data SomeSigningWitness
   | AGenesisDelegateExtendedSigningWitness  (SigningKey GenesisDelegateExtendedKey)
   | AGenesisUTxOSigningWitness              (SigningKey GenesisUTxOKey)
   | ADRepSigningWitness                     (SigningKey DRepKey)
+  | ACommitteeSigningWitness                (SigningKey CommitteeColdKey)
 
 
 -- | Data required for constructing a Shelley bootstrap witness.
@@ -652,6 +653,7 @@ categoriseSomeSigningWitness swsk =
     AGenesisDelegateExtendedSigningWitness  sk      -> AShelleyKeyWitness (WitnessGenesisDelegateExtendedKey      sk)
     AGenesisUTxOSigningWitness              sk      -> AShelleyKeyWitness (WitnessGenesisUTxOKey                  sk)
     ADRepSigningWitness                     sk      -> AShelleyKeyWitness (WitnessPaymentKey $ castDrep           sk)
+    ACommitteeSigningWitness                sk      -> AShelleyKeyWitness (WitnessCommitteeColdKey                sk)
 
 -- TODO: Conway era - Add constrctor for SigningKey DrepKey to ShelleyWitnessSigningKey
 castDrep :: SigningKey DRepKey -> SigningKey PaymentKey
@@ -704,6 +706,7 @@ readWitnessSigningData (KeyWitnessSigningData skFile mbByronAddr) = do
       , FromSomeType (AsSigningKey AsGenesisDelegateExtendedKey ) AGenesisDelegateExtendedSigningWitness
       , FromSomeType (AsSigningKey AsGenesisUTxOKey             ) AGenesisUTxOSigningWitness
       , FromSomeType (AsSigningKey AsDRepKey                    ) ADRepSigningWitness
+      , FromSomeType (AsSigningKey AsCommitteeColdKey           ) ACommitteeSigningWitness
       ]
 
     bech32FileTypes =
diff --git a/cardano-cli/test/cardano-cli-golden/Test/Golden/Shelley/TextEnvelope/Tx/Tx.hs b/cardano-cli/test/cardano-cli-golden/Test/Golden/Shelley/TextEnvelope/Tx/Tx.hs
index df890563df..62a3bb7bc1 100644
--- a/cardano-cli/test/cardano-cli-golden/Test/Golden/Shelley/TextEnvelope/Tx/Tx.hs
+++ b/cardano-cli/test/cardano-cli-golden/Test/Golden/Shelley/TextEnvelope/Tx/Tx.hs
@@ -47,3 +47,40 @@ hprop_golden_shelleyTx = propertyOnce . H.moduleWorkspace "tmp" $ \tempDir -> do
   -- Check the newly created files have not deviated from the
   -- golden files
   checkTxCddlFormat referenceTx transactionFile
+
+
+hprop_golden_checkIfConstitutionalCommitteeKeyCanSign :: Property
+hprop_golden_checkIfConstitutionalCommitteeKeyCanSign = propertyOnce . H.moduleWorkspace "tmp" $ \tempDir -> do
+  -- Reference keys
+  let referenceTx = "test/cardano-cli-golden/files/input/conway/tx"
+
+  -- Key filepaths
+  paymentSignKey <- noteInputFile "test/cardano-cli-golden/files/golden/shelley/transaction-sign/utxo.skey"
+  -- constitutional committee signing key
+  paymentSignKey2 <- noteInputFile "test/cardano-cli-golden/files/golden/conway/cold1-cc.skey"
+  transactionFile <- noteTempFile tempDir "tx-file"
+  transactionBodyFile <- noteTempFile tempDir "tx-body-file"
+
+  -- Create transaction body
+  void $ execCardanoCLI
+    [ "conway", "transaction", "build-raw"
+    , "--tx-in", "f62cd7bc15d8c6d2c8519fb8d13c57c0157ab6bab50af62bc63706feb966393d#0"
+    , "--tx-out", "addr_test1qpmxr8d8jcl25kyz2tz9a9sxv7jxglhddyf475045y8j3zxjcg9vquzkljyfn3rasfwwlkwu7hhm59gzxmsyxf3w9dps8832xh+1199989833223"
+    , "--tx-out", "addr_test1vpqgspvmh6m2m5pwangvdg499srfzre2dd96qq57nlnw6yctpasy4+10000000"
+    , "--fee", "166777"
+    , "--out-file", transactionBodyFile
+    ]
+
+  -- Sign transaction
+  void $ execCardanoCLI
+    [ "transaction", "sign"
+    , "--tx-body-file", transactionBodyFile
+    , "--signing-key-file", paymentSignKey
+    , "--signing-key-file", paymentSignKey2
+    , "--testnet-magic", "42"
+    , "--out-file", transactionFile
+    ]
+
+  -- Check the newly created files have not deviated from the
+  -- golden files
+  checkTxCddlFormat referenceTx transactionFile
diff --git a/cardano-cli/test/cardano-cli-golden/files/golden/conway/cold1-cc.skey b/cardano-cli/test/cardano-cli-golden/files/golden/conway/cold1-cc.skey
new file mode 100644
index 0000000000..4b6b7ff107
--- /dev/null
+++ b/cardano-cli/test/cardano-cli-golden/files/golden/conway/cold1-cc.skey
@@ -0,0 +1,5 @@
+{
+    "type": "ConstitutionalCommitteeColdSigningKey_ed25519",
+    "description": "Constitutional Committee Cold Signing Key",
+    "cborHex": "5820f213c36a77aea6174875b778d8cc60b4c5a3f47eb3a75c11effe64d2b7ce34db"
+}
diff --git a/cardano-cli/test/cardano-cli-golden/files/input/conway/tx b/cardano-cli/test/cardano-cli-golden/files/input/conway/tx
new file mode 100644
index 0000000000..159aa406c6
--- /dev/null
+++ b/cardano-cli/test/cardano-cli-golden/files/input/conway/tx
@@ -0,0 +1,5 @@
+{
+    "type": "Witnessed Tx ConwayEra",
+    "description": "Ledger Cddl Format",
+    "cborHex": "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"
+}
diff --git a/flake.lock b/flake.lock
index 64d1bf1a8a..7f8e4a6b6f 100644
--- a/flake.lock
+++ b/flake.lock
@@ -3,11 +3,11 @@
     "CHaP": {
       "flake": false,
       "locked": {
-        "lastModified": 1696197224,
-        "narHash": "sha256-dLz7+qtfK92aA6oW5Ybz+ybhZW34La9etWDr6GNWlBg=",
+        "lastModified": 1696323677,
+        "narHash": "sha256-HeJucJp1o8VoKW3Z3Mw8R0OBCAs9oANhtaMVrICTz7g=",
         "owner": "input-output-hk",
         "repo": "cardano-haskell-packages",
-        "rev": "ffb9ee2dfbf65c4b41d750021c04be3b9b76952c",
+        "rev": "3191a4624f848fa366b44e179e4bb8ca37181efa",
         "type": "github"
       },
       "original": {