diff --git a/.circleci/config.yml b/.circleci/config.yml
index c3e94c27d..8267e2c1b 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -202,6 +202,7 @@ workflows:
       - reth-all
       - teku-all
       - nimbus_mev
+      - complex_mev
 
   build:
     when: << pipeline.parameters.should-enable-build-workflow >>
@@ -241,9 +242,3 @@ workflows:
             branches:
               ignore:
                 - main
-
-      - complex_mev:
-          filters:
-            branches:
-              ignore:
-                - main
diff --git a/.circleci/tests/mev.json b/.circleci/tests/mev.json
index 1a0d9e593..e659b3105 100644
--- a/.circleci/tests/mev.json
+++ b/.circleci/tests/mev.json
@@ -1,9 +1,11 @@
 {
     "mev_type": "full",
     "mev_params": {
-        "launch_custom_flood": true
+        "launch_custom_flood": true,
+        "mev_relay_image": "flashbots/mev-boost-relay:0.27"
     },
     "network_params": {
-        "seconds_per_slot": 3
+        "seconds_per_slot": 3,
+        "capella_fork_epoch": 0
     }
 }
\ No newline at end of file
diff --git a/src/package_io/parse_input.star b/src/package_io/parse_input.star
index d80d1d8a6..72f907726 100644
--- a/src/package_io/parse_input.star
+++ b/src/package_io/parse_input.star
@@ -15,6 +15,7 @@ DEFAULT_CL_IMAGES = {
     "lodestar": "chainsafe/lodestar:latest",
 }
 
+MEV_BOOST_RELAY_DEFAULT_IMAGE = "flashbots/mev-boost-relay:0.26"
 
 NETHERMIND_NODE_NAME = "nethermind"
 NIMBUS_NODE_NAME = "nimbus"
@@ -82,6 +83,17 @@ def parse_input(plan, input_args):
             result.get("mev_type"),
         )
 
+    if (
+        result.get("mev_type") == "full"
+        and result["network_params"]["capella_fork_epoch"] == 0
+        and result["mev_params"]["mev_relay_image"] == MEV_BOOST_RELAY_DEFAULT_IMAGE
+    ):
+        fail(
+            "The default MEV image {0} requires a non-zero value for capella fork epoch set via network_params.capella_fork_epoch".format(
+                MEV_BOOST_RELAY_DEFAULT_IMAGE
+            )
+        )
+
     result["tx_spammer_params"] = get_default_tx_spammer_params()
 
     return struct(
@@ -373,7 +385,7 @@ def default_participant():
 
 def get_default_mev_params():
     return {
-        "mev_relay_image": "flashbots/mev-boost-relay:latest",
+        "mev_relay_image": MEV_BOOST_RELAY_DEFAULT_IMAGE,
         # TODO replace with flashbots/builder when they publish an arm64 image as mentioned in flashbots/builder#105
         "mev_builder_image": "ethpandaops/flashbots-builder:main",
         "mev_boost_image": "flashbots/mev-boost",