diff --git a/processor/src/main/kotlin/org/ethereum/lists/chains/Main.kt b/processor/src/main/kotlin/org/ethereum/lists/chains/Main.kt
index c2f01963..0b76dc5c 100644
--- a/processor/src/main/kotlin/org/ethereum/lists/chains/Main.kt
+++ b/processor/src/main/kotlin/org/ethereum/lists/chains/Main.kt
@@ -262,8 +262,8 @@ fun checkChain(chainFile: File, connectRPC: Boolean) {
             }
 
             val url = explorer["url"]
-            if (url == null || url !is String || !url.startsWith("https://")) {
-                throw (ExplorerMustWithHttps())
+            if (url == null || url !is String || !(url.startsWith("https://") || url.startsWith("http://"))) {
+                throw (ExplorerMustWithHttpsOrHttp())
             }
 
             if (url.endsWith("/")) {
diff --git a/processor/src/main/kotlin/org/ethereum/lists/chains/model/Exceptions.kt b/processor/src/main/kotlin/org/ethereum/lists/chains/model/Exceptions.kt
index 839c8d2b..f59f3621 100644
--- a/processor/src/main/kotlin/org/ethereum/lists/chains/model/Exceptions.kt
+++ b/processor/src/main/kotlin/org/ethereum/lists/chains/model/Exceptions.kt
@@ -17,7 +17,7 @@ class ShortNameMustNotBeStar: Exception("short name must not be '*'")
 class UnsupportedNamespace: Exception("So far only the EIP155 namespace is supported")
 class ExplorersMustBeArray: Exception("explorers must be an array")
 class ExplorerMustHaveName: Exception("Explorer must have name")
-class ExplorerMustWithHttps: Exception("Explorer have url starting with https://")
+class ExplorerMustWithHttpsOrHttp: Exception("Explorer have url starting with https:// or http://")
 class ExplorerCannotEndInSlash: Exception("Explorer cannot have a slash on the end")
 class ExplorerStandardMustBeEIP3091OrNone: Exception("explorer standard must be 'none' or 'EIP3091'")
 class ParentHasInvalidType(type: String?): Exception("Parent has invalid type $type - only L2 or shard allowed")
diff --git a/processor/src/test/kotlin/org/ethereum/lists/chains/TheChainChecker.kt b/processor/src/test/kotlin/org/ethereum/lists/chains/TheChainChecker.kt
index e87b2f75..100c1538 100644
--- a/processor/src/test/kotlin/org/ethereum/lists/chains/TheChainChecker.kt
+++ b/processor/src/test/kotlin/org/ethereum/lists/chains/TheChainChecker.kt
@@ -226,12 +226,12 @@ class TheChainChecker {
         checkChain(getFile("invalid/explorernoname/eip155-1.json"), false)
     }
 
-    @Test(expected = ExplorerMustWithHttps::class)
+    @Test(expected = ExplorerMustWithHttpsOrHttp::class)
     fun shouldFailOnInvalidUrl() {
         checkChain(getFile("invalid/explorerinvalidurl/eip155-1.json"), false)
     }
 
-    @Test(expected = ExplorerMustWithHttps::class)
+    @Test(expected = ExplorerMustWithHttpsOrHttp::class)
     fun shouldFailOnMissingURL() {
         checkChain(getFile("invalid/explorermissingurl/eip155-1.json"), false)
     }