diff --git a/WORKSPACE b/WORKSPACE
index c5b2d764e..2d2ddff4b 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -1305,7 +1305,7 @@ go_repository(
 
 go_repository(
     name = "com_github_prysmaticlabs_ethereumapis",
-    commit = "4685995df20b6d7a926fb98778c940e380db33ee",
+    commit = "1c66911b2ef3c1a290abb2156bcecb33ac32725f",
     importpath = "github.com/prysmaticlabs/ethereumapis",
 )
 
diff --git a/beacon-chain/rpc/beacon/assignments.go b/beacon-chain/rpc/beacon/assignments.go
index fa813475a..a889436d6 100644
--- a/beacon-chain/rpc/beacon/assignments.go
+++ b/beacon-chain/rpc/beacon/assignments.go
@@ -123,6 +123,7 @@ func (bs *Server) ListValidatorAssignments(
 			AttesterSlot:     comAssignment.AttesterSlot,
 			ProposerSlots:    proposerIndexToSlots[index],
 			PublicKey:        pubkey[:],
+			ValidatorIndex:   index,
 		}
 		res = append(res, assign)
 	}
@@ -256,6 +257,7 @@ func (bs *Server) listValidatorAssignmentsUsingOldArchival(
 			AttesterSlot:     comAssignment.AttesterSlot,
 			ProposerSlots:    proposerIndexToSlots[index],
 			PublicKey:        pubkey[:],
+			ValidatorIndex:   index,
 		}
 		res = append(res, assign)
 	}
diff --git a/beacon-chain/rpc/beacon/assignments_test.go b/beacon-chain/rpc/beacon/assignments_test.go
index 31bb1c28a..e92308620 100644
--- a/beacon-chain/rpc/beacon/assignments_test.go
+++ b/beacon-chain/rpc/beacon/assignments_test.go
@@ -257,6 +257,7 @@ func TestServer_ListAssignments_Pagination_DefaultPageSize_NoArchive(t *testing.
 			AttesterSlot:     committeeAssignments[index].AttesterSlot,
 			ProposerSlots:    proposerIndexToSlots[index],
 			PublicKey:        val.PublicKey,
+			ValidatorIndex:   index,
 		})
 	}
 	if !reflect.DeepEqual(res.Assignments, wanted) {
@@ -348,6 +349,7 @@ func TestServer_ListAssignments_Pagination_DefaultPageSize_FromArchive(t *testin
 			AttesterSlot:     committeeAssignments[index].AttesterSlot,
 			ProposerSlots:    proposerIndexToSlots[index],
 			PublicKey:        val.PublicKey,
+			ValidatorIndex:   index,
 		})
 	}
 
@@ -437,6 +439,7 @@ func TestServer_ListAssignments_FilterPubkeysIndices_NoPagination(t *testing.T)
 			AttesterSlot:     committeeAssignments[index].AttesterSlot,
 			ProposerSlots:    proposerIndexToSlots[index],
 			PublicKey:        val.PublicKey,
+			ValidatorIndex:   index,
 		})
 	}
 
@@ -520,6 +523,7 @@ func TestServer_ListAssignments_CanFilterPubkeysIndices_WithPagination(t *testin
 			AttesterSlot:     committeeAssignments[index].AttesterSlot,
 			ProposerSlots:    proposerIndexToSlots[index],
 			PublicKey:        val.PublicKey,
+			ValidatorIndex:   index,
 		})
 	}
 
@@ -555,6 +559,7 @@ func TestServer_ListAssignments_CanFilterPubkeysIndices_WithPagination(t *testin
 			AttesterSlot:     cAssignments[index].AttesterSlot,
 			ProposerSlots:    proposerIndexToSlots[index],
 			PublicKey:        val.PublicKey,
+			ValidatorIndex:   index,
 		})
 	}
 
diff --git a/beacon-chain/rpc/beacon/validators.go b/beacon-chain/rpc/beacon/validators.go
index aaf763019..af1549f99 100644
--- a/beacon-chain/rpc/beacon/validators.go
+++ b/beacon-chain/rpc/beacon/validators.go
@@ -778,9 +778,11 @@ func (bs *Server) GetValidatorQueue(
 	}
 
 	return &ethpb.ValidatorQueue{
-		ChurnLimit:           churnLimit,
-		ActivationPublicKeys: activationQueueKeys,
-		ExitPublicKeys:       exitQueueKeys,
+		ChurnLimit:                 churnLimit,
+		ActivationPublicKeys:       activationQueueKeys,
+		ExitPublicKeys:             exitQueueKeys,
+		ActivationValidatorIndices: activationQ,
+		ExitValidatorIndices:       exitQueueIndices,
 	}, nil
 }
 
diff --git a/beacon-chain/rpc/beacon/validators_test.go b/beacon-chain/rpc/beacon/validators_test.go
index c515564e9..4ede5e2f5 100644
--- a/beacon-chain/rpc/beacon/validators_test.go
+++ b/beacon-chain/rpc/beacon/validators_test.go
@@ -1434,6 +1434,10 @@ func TestServer_GetValidatorQueue_PendingActivation(t *testing.T) {
 	if !reflect.DeepEqual(res.ActivationPublicKeys, wanted) {
 		t.Errorf("Wanted %v, received %v", wanted, res.ActivationPublicKeys)
 	}
+	wantedActiveIndices := []uint64{2, 1, 0}
+	if !reflect.DeepEqual(res.ActivationValidatorIndices, wantedActiveIndices) {
+		t.Errorf("wanted %v, received %v", wantedActiveIndices, res.ActivationValidatorIndices)
+	}
 }
 
 func TestServer_GetValidatorQueue_ExitedValidatorLeavesQueue(t *testing.T) {
@@ -1487,6 +1491,10 @@ func TestServer_GetValidatorQueue_ExitedValidatorLeavesQueue(t *testing.T) {
 	if !reflect.DeepEqual(res.ExitPublicKeys, wanted) {
 		t.Errorf("Wanted %v, received %v", wanted, res.ExitPublicKeys)
 	}
+	wantedExitIndices := []uint64{1}
+	if !reflect.DeepEqual(res.ExitValidatorIndices, wantedExitIndices) {
+		t.Errorf("wanted %v, received %v", wantedExitIndices, res.ExitValidatorIndices)
+	}
 
 	// Now, we move the state.slot past the exit epoch of the validator, and now
 	// the validator should no longer exist in the queue.