diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7632a997e..f05127d74 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## Next Release
+## 23.9.1
 
 ### Breaking Changes
 - Remove --validator-ids option from watermark-repair subcommand [#909](https://github.com/Consensys/web3signer/pull/909)
@@ -10,6 +10,7 @@
 - Add High Watermark functionality [#696](https://github.com/Consensys/web3signer/issues/696) 
   - Update `watermark-repair` subcommand with new options `--set-high-watermark`, `--remove-high-watermark` [#912](https://github.com/Consensys/web3signer/pull/912)
   - Add GET `/highWatermark` to eth2 endpoints [#908](https://github.com/Consensys/web3signer/pull/908)
+- Add network configuration for revised Holesky testnet
 
 ## 23.9.0
 
diff --git a/acceptance-tests/build.gradle b/acceptance-tests/build.gradle
index 42d3efbb8..ab8cdf840 100644
--- a/acceptance-tests/build.gradle
+++ b/acceptance-tests/build.gradle
@@ -52,9 +52,8 @@ dependencies {
   testImplementation 'tech.pegasys.teku.internal:networks'
   testImplementation 'tech.pegasys.teku.internal:json'
   testImplementation 'tech.pegasys.teku.internal:jackson'
-  // Use test fixtures from Teku 23.8.0 as latest version doesn't include any test fixtures
-  testImplementation (group: 'tech.pegasys.teku.internal', name: 'spec', classifier: 'test-fixtures', version: '23.8.0')
-  testImplementation (group: 'tech.pegasys.teku.internal', name: 'bls', classifier: 'test-fixtures', version: '23.8.0')
+  testImplementation (group: 'tech.pegasys.teku.internal', name: 'spec', classifier: 'test-fixtures')
+  testImplementation (group: 'tech.pegasys.teku.internal', name: 'bls', classifier: 'test-fixtures')
   testImplementation 'tech.pegasys.teku.internal:serializer'
   testImplementation 'tech.pegasys.teku.internal:unsigned'
   testImplementation 'tech.pegasys.teku.internal:async'
diff --git a/acceptance-tests/src/test/resources/eth2/network_config.yaml b/acceptance-tests/src/test/resources/eth2/network_config.yaml
index 4bc447b4e..9ccf28bc5 100644
--- a/acceptance-tests/src/test/resources/eth2/network_config.yaml
+++ b/acceptance-tests/src/test/resources/eth2/network_config.yaml
@@ -15,6 +15,7 @@ MIN_VALIDATOR_WITHDRAWABILITY_DELAY: 256
 MAX_SEED_LOOKAHEAD: 1
 EJECTION_BALANCE: 16000000000
 MIN_PER_EPOCH_CHURN_LIMIT: 4
+MAX_PER_EPOCH_ACTIVATION_CHURN_LIMIT: 4
 
 # Networking
 # `10 * 2**20` (= 10485760, 10 MiB)
diff --git a/gradle/versions.gradle b/gradle/versions.gradle
index aa728110b..47b7f92b9 100644
--- a/gradle/versions.gradle
+++ b/gradle/versions.gradle
@@ -90,7 +90,7 @@ dependencyManagement {
 
     dependency 'org.xipki.iaik:sunpkcs11-wrapper:1.4.9'
 
-    dependencySet(group: 'tech.pegasys.teku.internal', version: '23.9.0') {
+    dependencySet(group: 'tech.pegasys.teku.internal', version: '23.9.1') {
       entry ('bls') {
         exclude group: 'org.bouncycastle', name: 'bcprov-jdk15on'
       }