diff --git a/common/eth2_network_config/built_in_network_configs/gnosis/config.yaml b/common/eth2_network_config/built_in_network_configs/gnosis/config.yaml
index 34313aa393..d27f7a09e8 100644
--- a/common/eth2_network_config/built_in_network_configs/gnosis/config.yaml
+++ b/common/eth2_network_config/built_in_network_configs/gnosis/config.yaml
@@ -46,7 +46,7 @@ ELECTRA_FORK_VERSION: 0x05000064
 ELECTRA_FORK_EPOCH: 1337856 # 2025-04-30T14:03:40.000Z
 # Fulu
 FULU_FORK_VERSION: 0x06000064
-FULU_FORK_EPOCH: 18446744073709551615
+FULU_FORK_EPOCH: 1714688  # Tue Apr 14 2026 12:06:20 GMT+0000
 # Gloas
 GLOAS_FORK_VERSION: 0x07000064
 GLOAS_FORK_EPOCH: 18446744073709551615
@@ -156,6 +156,11 @@ NUMBER_OF_CUSTODY_GROUPS: 128
 DATA_COLUMN_SIDECAR_SUBNET_COUNT: 128
 SAMPLES_PER_SLOT: 8
 CUSTODY_REQUIREMENT: 4
+VALIDATOR_CUSTODY_REQUIREMENT: 8
+BALANCE_PER_ADDITIONAL_CUSTODY_GROUP: 32000000000
+MAX_REQUEST_DATA_COLUMN_SIDECARS: 16384
+# `2**14` (= 16384 epochs, ~15 days)
+MIN_EPOCHS_FOR_DATA_COLUMN_SIDECARS_REQUESTS: 16384
 MAX_BLOBS_PER_BLOCK_FULU: 12
 
 # Gloas
\ No newline at end of file
diff --git a/consensus/types/src/core/chain_spec.rs b/consensus/types/src/core/chain_spec.rs
index 6d25e3baf4..f505c9f0d9 100644
--- a/consensus/types/src/core/chain_spec.rs
+++ b/consensus/types/src/core/chain_spec.rs
@@ -1604,7 +1604,7 @@ impl ChainSpec {
              * Fulu hard fork params
              */
             fulu_fork_version: [0x06, 0x00, 0x00, 0x64],
-            fulu_fork_epoch: None,
+            fulu_fork_epoch: Some(Epoch::new(1714688)),
             custody_requirement: 4,
             number_of_custody_groups: 128,
             data_column_sidecar_subnet_count: 128,
@@ -1673,8 +1673,7 @@ impl ChainSpec {
              * Networking Fulu specific
              */
             blob_schedule: BlobSchedule::default(),
-            min_epochs_for_data_column_sidecars_requests:
-                default_min_epochs_for_data_column_sidecars_requests(),
+            min_epochs_for_data_column_sidecars_requests: 16384,
             max_data_columns_by_root_request: default_data_columns_by_root_request(),
 
             /*