diff --git a/.github/config/assertoor/network_params_blob.yaml b/.github/config/assertoor/network_params_blob.yaml
index c76281f378..e071848fe1 100644
--- a/.github/config/assertoor/network_params_blob.yaml
+++ b/.github/config/assertoor/network_params_blob.yaml
@@ -1,12 +1,15 @@
 participants:
   - el_type: ethrex
     cl_type: lighthouse
+    cl_image: sigp/lighthouse:v5.3.0
     validator_count: 32
   - el_type: geth
     cl_type: lighthouse
+    cl_image: sigp/lighthouse:v5.3.0
     validator_count: 32
   - el_type: geth
     cl_type: lighthouse
+    cl_image: sigp/lighthouse:v5.3.0
     validator_count: 32
 
 additional_services:
diff --git a/.github/config/assertoor/network_params_tx.yaml b/.github/config/assertoor/network_params_tx.yaml
index a909c56815..ce43e992ee 100644
--- a/.github/config/assertoor/network_params_tx.yaml
+++ b/.github/config/assertoor/network_params_tx.yaml
@@ -1,9 +1,11 @@
 participants:
   - el_type: ethrex
     cl_type: lighthouse
+    cl_image: sigp/lighthouse:v5.3.0
     validator_count: 32
   - el_type: geth
     cl_type: lighthouse
+    cl_image: sigp/lighthouse:v5.3.0
     validator_count: 32
 
 additional_services:
diff --git a/test_data/network_params.yaml b/test_data/network_params.yaml
index 0a69ee8046..da8ba784aa 100644
--- a/test_data/network_params.yaml
+++ b/test_data/network_params.yaml
@@ -1,12 +1,15 @@
 participants:
   - el_type: ethrex
     cl_type: lighthouse
+    cl_image: sigp/lighthouse:v5.3.0
     validator_count: 32
   - el_type: geth
     cl_type: lighthouse
+    cl_image: sigp/lighthouse:v5.3.0
     validator_count: 32
   - el_type: geth
     cl_type: lighthouse
+    cl_image: sigp/lighthouse:v5.3.0
     validator_count: 32
 
 additional_services: