diff --git a/config/src/main/resources/mainnet.json b/config/src/main/resources/mainnet.json
index b853e7bcf6..ce6570fc7c 100644
--- a/config/src/main/resources/mainnet.json
+++ b/config/src/main/resources/mainnet.json
@@ -9,6 +9,7 @@
     "eip155Block": 2675000,
     "eip158Block": 2675000,
     "byzantiumBlock": 4370000,
+    "constantinopleBlock": 7080000,
     "ethash": {
 
     }
diff --git a/ethereum/core/src/test/java/tech/pegasys/pantheon/ethereum/mainnet/MainnetProtocolScheduleTest.java b/ethereum/core/src/test/java/tech/pegasys/pantheon/ethereum/mainnet/MainnetProtocolScheduleTest.java
index 9b69aae64a..95355ef0df 100644
--- a/ethereum/core/src/test/java/tech/pegasys/pantheon/ethereum/mainnet/MainnetProtocolScheduleTest.java
+++ b/ethereum/core/src/test/java/tech/pegasys/pantheon/ethereum/mainnet/MainnetProtocolScheduleTest.java
@@ -37,7 +37,9 @@ public void shouldReturnDefaultProtocolSpecsWhenCustomNumbersAreNotUsed() {
         .isEqualTo("TangerineWhistle");
     Assertions.assertThat(sched.getByBlockNumber(2_675_000L).getName()).isEqualTo("SpuriousDragon");
     Assertions.assertThat(sched.getByBlockNumber(4_730_000L).getName()).isEqualTo("Byzantium");
-    Assertions.assertThat(sched.getByBlockNumber(Long.MAX_VALUE).getName()).isEqualTo("Byzantium");
+    Assertions.assertThat(sched.getByBlockNumber(7_080_000L).getName()).isEqualTo("Constantinople");
+    Assertions.assertThat(sched.getByBlockNumber(Long.MAX_VALUE).getName())
+        .isEqualTo("Constantinople");
   }
 
   @Test