diff --git a/.golangci.yml b/.golangci.yml
index 9356cb7d..b94397e5 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -106,6 +106,10 @@ output:
 
 # All available settings of specific linters.
 linters-settings:
+  gosec:
+    excludes:
+      - G115 # This generates a lot of false positives.
+
   lll:
     line-length: 132
 
@@ -162,6 +166,7 @@ linters:
     - execinquery
     - exhaustive
     - exhaustruct
+    - exportloopref
     - forcetypeassert
     - funlen
     - gci
diff --git a/api/v1/forkchoice.go b/api/v1/forkchoice.go
index d890b4a9..0de7e006 100644
--- a/api/v1/forkchoice.go
+++ b/api/v1/forkchoice.go
@@ -147,7 +147,7 @@ func (d *ForkChoiceNodeValidity) UnmarshalJSON(input []byte) error {
 
 // String returns a string representation of the ForkChoiceNodeValidity.
 func (d ForkChoiceNodeValidity) String() string {
-	if int(d) >= len(ForkChoiceNodeValidityStrings) {
+	if uint64(d) >= uint64(len(ForkChoiceNodeValidityStrings)) {
 		return "unknown"
 	}
 
diff --git a/http/events_internal_test.go b/http/events_internal_test.go
index 683460ba..f00e7c95 100644
--- a/http/events_internal_test.go
+++ b/http/events_internal_test.go
@@ -147,7 +147,7 @@ func TestEventHandler(t *testing.T) {
 			name: "BLSToExecutionChangeGood",
 			message: &sse.Event{
 				Event: []byte("bls_to_execution_change"),
-				Data:  []byte(`{"validator_index":"63401","from_bls_pubkey":"0xa46ed2574770ec1942d577ef89e0bf7b0d601349dab791740dead3fb5a6e2624cf62b9e58de1074c49f44b986eb39002","to_execution_address":"0xd641D2Cc74C7b6A641861260d07D67eB67bc7403"}`),
+				Data:  []byte(`{"message":{"validator_index":"63401","from_bls_pubkey":"0xa46ed2574770ec1942d577ef89e0bf7b0d601349dab791740dead3fb5a6e2624cf62b9e58de1074c49f44b986eb39002","to_execution_address":"0xd641D2Cc74C7b6A641861260d07D67eB67bc7403"},"signature":"0xb9ce6f10137a8bc73cd5545e5d6c7c61bc1294b853e71e5eb090a7a773d7773c4d7732f4244e9891cd5c1f7a5fbc951c0b368a8bd7dc44b1598a6d1bdb4476f9f364ef521c366e55565792810f0cb8bf8cc20134f32ed8dde54507f622402d6e"}`),
 			},
 			handler: handler,
 			handled: true,
diff --git a/http/spec.go b/http/spec.go
index e3162068..a2a2f5cd 100644
--- a/http/spec.go
+++ b/http/spec.go
@@ -121,8 +121,8 @@ func (s *Service) Spec(ctx context.Context,
 
 		// Handle durations.
 		if strings.HasPrefix(k, "SECONDS_PER_") || k == "GENESIS_DELAY" {
-			intVal, err := strconv.ParseUint(v, 10, 64)
-			if err == nil && intVal != 0 {
+			intVal, err := strconv.ParseInt(v, 10, 64)
+			if err == nil && intVal >= 0 {
 				config[k] = time.Duration(intVal) * time.Second
 
 				continue
diff --git a/spec/builderversion.go b/spec/builderversion.go
index c6871432..17a6cc41 100644
--- a/spec/builderversion.go
+++ b/spec/builderversion.go
@@ -50,7 +50,7 @@ func (d *BuilderVersion) UnmarshalJSON(input []byte) error {
 
 // String returns a string representation of the struct.
 func (d BuilderVersion) String() string {
-	if int(d) >= len(responseBuilderVersionStrings) {
+	if uint64(d) >= uint64(len(responseBuilderVersionStrings)) {
 		return "unknown"
 	}
 
diff --git a/spec/dataversion.go b/spec/dataversion.go
index ef09d06e..45dbcb82 100644
--- a/spec/dataversion.go
+++ b/spec/dataversion.go
@@ -73,7 +73,7 @@ func (d *DataVersion) UnmarshalJSON(input []byte) error {
 
 // String returns a string representation of the struct.
 func (d DataVersion) String() string {
-	if int(d) >= len(dataVersionStrings) {
+	if uint64(d) >= uint64(len(dataVersionStrings)) {
 		return "unknown"
 	}