diff --git a/data/beaconrestapi/src/test/resources/tech/pegasys/teku/beaconrestapi/handlers/v1/config/mainnetConfig.json b/data/beaconrestapi/src/test/resources/tech/pegasys/teku/beaconrestapi/handlers/v1/config/mainnetConfig.json
index ae75d5af13c..6f92213af6e 100644
--- a/data/beaconrestapi/src/test/resources/tech/pegasys/teku/beaconrestapi/handlers/v1/config/mainnetConfig.json
+++ b/data/beaconrestapi/src/test/resources/tech/pegasys/teku/beaconrestapi/handlers/v1/config/mainnetConfig.json
@@ -13,7 +13,13 @@
   "BASE_REWARD_FACTOR": "64",
   "BELLATRIX_FORK_EPOCH": "144896",
   "BELLATRIX_FORK_VERSION": "0x02000000",
-  "BLOB_SCHEDULE": [],
+  "BLOB_SCHEDULE": [ {
+    "EPOCH" : "412672",
+    "MAX_BLOBS_PER_BLOCK" : "15"
+  }, {
+    "EPOCH" : "419072",
+    "MAX_BLOBS_PER_BLOCK" : "21"
+  } ],
   "BLOB_SIDECAR_SUBNET_COUNT": "6",
   "BLOB_SIDECAR_SUBNET_COUNT_ELECTRA": "9",
   "BLS_WITHDRAWAL_PREFIX": "0x00",
@@ -57,7 +63,7 @@
   "FIELD_ELEMENTS_PER_BLOB": "4096",
   "FIELD_ELEMENTS_PER_CELL": "64",
   "FIELD_ELEMENTS_PER_EXT_BLOB": "8192",
-  "FULU_FORK_EPOCH": "18446744073709551615",
+  "FULU_FORK_EPOCH": "411392",
   "FULU_FORK_VERSION": "0x06000000",
   "GENESIS_DELAY": "604800",
   "GENESIS_FORK_VERSION": "0x00000000",
diff --git a/ethereum/spec/src/main/resources/tech/pegasys/teku/spec/config/configs/mainnet.yaml b/ethereum/spec/src/main/resources/tech/pegasys/teku/spec/config/configs/mainnet.yaml
index 736227e994f..9e1223a5634 100644
--- a/ethereum/spec/src/main/resources/tech/pegasys/teku/spec/config/configs/mainnet.yaml
+++ b/ethereum/spec/src/main/resources/tech/pegasys/teku/spec/config/configs/mainnet.yaml
@@ -55,7 +55,7 @@ ELECTRA_FORK_VERSION: 0x05000000
 ELECTRA_FORK_EPOCH: 364032  # May 7, 2025, 10:05:11am UTC
 # Fulu
 FULU_FORK_VERSION: 0x06000000
-FULU_FORK_EPOCH: 18446744073709551615 # temporary stub
+FULU_FORK_EPOCH: 411392 # December 3, 2025, 09:49:11pm UTC
 # Gloas
 GLOAS_FORK_VERSION: 0x07000000
 GLOAS_FORK_EPOCH: 18446744073709551615 # temporary stub
@@ -207,4 +207,8 @@ MAX_REQUEST_PAYLOADS: 128
 # Blob Scheduling
 # ---------------------------------------------------------------
 
-BLOB_SCHEDULE: []
\ No newline at end of file
+BLOB_SCHEDULE:
+  - EPOCH: 412672  # December 9, 2025, 02:21:11pm UTC
+    MAX_BLOBS_PER_BLOCK: 15
+  - EPOCH: 419072  # January 7, 2026, 01:01:11am UTC
+    MAX_BLOBS_PER_BLOCK: 21
\ No newline at end of file
diff --git a/specrefs/configs.yml b/specrefs/configs.yml
index 654d59eabff..ed57ae32ca2 100644
--- a/specrefs/configs.yml
+++ b/specrefs/configs.yml
@@ -355,7 +355,8 @@
 - name: MAX_BLOBS_PER_BLOCK
   sources:
     - file: ethereum/spec/src/main/resources/tech/pegasys/teku/spec/config/configs/mainnet.yaml
-      search: "MAX_BLOBS_PER_BLOCK:"
+      search: "^MAX_BLOBS_PER_BLOCK:"
+      regex: true
   spec: |
     <spec config_var="MAX_BLOBS_PER_BLOCK" fork="deneb" hash="3e0b5383">
     MAX_BLOBS_PER_BLOCK: uint64 = 6
diff --git a/teku/src/test/java/tech/pegasys/teku/cli/options/Eth2NetworkOptionsTest.java b/teku/src/test/java/tech/pegasys/teku/cli/options/Eth2NetworkOptionsTest.java
index 26889e799cd..3b4fc81a01d 100644
--- a/teku/src/test/java/tech/pegasys/teku/cli/options/Eth2NetworkOptionsTest.java
+++ b/teku/src/test/java/tech/pegasys/teku/cli/options/Eth2NetworkOptionsTest.java
@@ -39,8 +39,7 @@ class Eth2NetworkOptionsTest extends AbstractBeaconNodeCommandTest {
   void shouldEnableDenebByDefault() {
     final TekuConfiguration config = getTekuConfigurationFromArguments();
     final Spec spec = config.eth2NetworkConfiguration().getSpec();
-    assertThat(spec.getForkSchedule().getHighestSupportedMilestone())
-        .isEqualTo(SpecMilestone.ELECTRA);
+    assertThat(spec.getForkSchedule().getHighestSupportedMilestone()).isEqualTo(SpecMilestone.FULU);
   }
 
   @Test