diff --git a/location4j/src/main/java/com/tomaytotomato/loader/DefaultCountriesDataLoaderImpl.java b/location4j/src/main/java/com/tomaytotomato/loader/DefaultCountriesDataLoaderImpl.java
index f4f320c..a4c9711 100644
--- a/location4j/src/main/java/com/tomaytotomato/loader/DefaultCountriesDataLoaderImpl.java
+++ b/location4j/src/main/java/com/tomaytotomato/loader/DefaultCountriesDataLoaderImpl.java
@@ -27,8 +27,8 @@ public DefaultCountriesDataLoaderImpl() {
         String urlToThis =
                 this.getClass().getResource(this.getClass().getSimpleName() + ".class").toString();
         String trimmed = urlToFile.substring(0, urlToFile.indexOf(DEFAULT_FILE));
-        if (!urlToThis.substring(0, trimmed.length()).equals(trimmed)) {
-            throw new RuntimeException(
+        if (!urlToThis.startsWith(trimmed)) {
+            throw new SecurityException(
                     DEFAULT_FILE + " is not in the same artifact as the loader: security issue");
         }