diff --git a/README.MD b/README.MD
index aaadbe5..f6b25e8 100644
--- a/README.MD
+++ b/README.MD
@@ -22,7 +22,7 @@ Make sure you include the <a href="https://jitpack.io/">repository</a> as well.
     <dependency>
         <groupId>com.github.qlsolutions.JavalinFly</groupId>
         <artifactId>javalinfly-core</artifactId>
-        <version>0.1.8rc12</version>
+        <version>0.1.8rc13</version>
     </dependency>       
    ```
 
@@ -37,7 +37,7 @@ Make sure you include the <a href="https://jitpack.io/">repository</a> as well.
                 <annotationProcessorPath>
                     <groupId>com.github.qlsolutions.JavalinFly</groupId>
                     <artifactId>javalinfly-core</artifactId>
-                    <version>0.1.8rc12</version>
+                    <version>0.1.8rc13</version>
                 </annotationProcessorPath>
             </annotationProcessorPaths>
         </configuration>
@@ -51,7 +51,7 @@ Make sure you include the <a href="https://jitpack.io/">repository</a> as well.
     <dependency>
         <groupId>com.github.qlsolutions.JavalinFly</groupId>
         <artifactId>javalinfly-kotlin</artifactId>
-        <version>0.1.8rc12</version>
+        <version>0.1.8rc13</version>
     </dependency>
     ```
 
@@ -69,20 +69,20 @@ Make sure you include the <a href="https://jitpack.io/">repository</a> as well.
     - Dependency
 
     ```groovy
-    implementation 'com.github.qlsolutions.JavalinFly:javalinfly-core:0.1.8rc12'
+    implementation 'com.github.qlsolutions.JavalinFly:javalinfly-core:0.1.8rc13'
     ```
 
     - Annotation processor
 
     ```groovy
-    annotationProcessor 'com.github.qlsolutions.JavalinFly:javalinfly-core:0.1.8rc12'
+    annotationProcessor 'com.github.qlsolutions.JavalinFly:javalinfly-core:0.1.8rc13'
     ```
 
     - <details>
         <summary>Optionally also the kotlin module</summary>
       
         ```groovy
-        implementation 'com.github.qlsolutions.JavalinFly:javalinfly-kotlin:0.1.8rc12'
+        implementation 'com.github.qlsolutions.JavalinFly:javalinfly-kotlin:0.1.8rc13'
         ```
       
         </details>
@@ -93,19 +93,19 @@ Make sure you include the <a href="https://jitpack.io/">repository</a> as well.
 
     - Dependency
     ```groovy
-    implementation("com.github.qlsolutions.JavalinFly:javalinfly-core:0.1.8rc12")
+    implementation("com.github.qlsolutions.JavalinFly:javalinfly-core:0.1.8rc13")
     ```
 
     - Annotation processor
     ```groovy
-    annotationProcessor("com.github.qlsolutions.JavalinFly:javalinfly-core:0.1.8rc12")
+    annotationProcessor("com.github.qlsolutions.JavalinFly:javalinfly-core:0.1.8rc13")
     ```
 
     - <details>
         <summary>Optionally also the kotlin module</summary>
 
         ```groovy
-        implementation("com.github.qlsolutions.JavalinFly:javalinfly-kotlin:0.1.8rc12")
+        implementation("com.github.qlsolutions.JavalinFly:javalinfly-kotlin:0.1.8rc13")
         ```
 
         </details>
diff --git a/javalinfly-core/pom.xml b/javalinfly-core/pom.xml
index 2f09ee9..8d25f46 100644
--- a/javalinfly-core/pom.xml
+++ b/javalinfly-core/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.github.unldenis</groupId>
     <artifactId>JavalinFly</artifactId>
-    <version>0.1.8rc12</version>
+    <version>0.1.8rc13</version>
   </parent>
 
   <artifactId>javalinfly-core</artifactId>
diff --git a/javalinfly-core/src/main/java/com/quicklink/javalinfly/Vars.java b/javalinfly-core/src/main/java/com/quicklink/javalinfly/Vars.java
index 5035a61..e2ee2a7 100644
--- a/javalinfly-core/src/main/java/com/quicklink/javalinfly/Vars.java
+++ b/javalinfly-core/src/main/java/com/quicklink/javalinfly/Vars.java
@@ -1,13 +1,15 @@
 package com.quicklink.javalinfly;
 
 import com.quicklink.javalinfly.openapi.SwaggerUIHtmlGenerator;
+import com.quicklink.javalinfly.processor.utils.ResourceUtil;
+
 public class Vars {
 
   public static final String RESOURCE_FILE_SPEC = "openapiSpec.json";
 
 
   public static String openApiSpec() {
-    return SwaggerUIHtmlGenerator.readResourceFile(RESOURCE_FILE_SPEC);
+    return ResourceUtil.readResourceFile(RESOURCE_FILE_SPEC);
   }
 
   private static String SWAGGER_UI = null;
diff --git a/javalinfly-core/src/main/java/com/quicklink/javalinfly/openapi/SwaggerUIHtmlGenerator.java b/javalinfly-core/src/main/java/com/quicklink/javalinfly/openapi/SwaggerUIHtmlGenerator.java
index eed52ee..ece5879 100644
--- a/javalinfly-core/src/main/java/com/quicklink/javalinfly/openapi/SwaggerUIHtmlGenerator.java
+++ b/javalinfly-core/src/main/java/com/quicklink/javalinfly/openapi/SwaggerUIHtmlGenerator.java
@@ -4,6 +4,7 @@
 import com.goterl.resourceloader.FileLoader;
 import com.quicklink.javalinfly.JavalinFly;
 
+import com.quicklink.javalinfly.processor.utils.ResourceUtil;
 import java.io.IOException;
 import java.io.UncheckedIOException;
 import java.net.URISyntaxException;
@@ -11,21 +12,14 @@
 
 public class SwaggerUIHtmlGenerator {
 
-    public static String readResourceFile(String fileName) {
-      try {
-        var file = FileLoader.get().load(fileName, JavalinFly.class);
-        return Files.readString(file.toPath());
-      } catch (IOException e) {
-        throw new UncheckedIOException(e);
-      } catch (URISyntaxException e) {
-        throw new RuntimeException(e);
-      }
-    }
+
 
     public static String generateSwaggerUIHtml(String openApiJson) {
-        String swaggerUiCss = readResourceFile("swagger-ui.css");
-        String swaggerUiBundleJs = readResourceFile("swagger-ui-bundle.js");
-        String swaggerUiStandalonePresetJs = readResourceFile("swagger-ui-standalone-preset.js");
+        String swaggerUiCss = ResourceUtil.readResourceFile("swagger-ui.css");
+        String swaggerUiBundleJs =  ResourceUtil.readResourceFile(
+            "swagger-ui-bundle.js");
+        String swaggerUiStandalonePresetJs =  ResourceUtil.readResourceFile(
+            "swagger-ui-standalone-preset.js");
 
         StringBuilder swaggerUiTemplate = new StringBuilder()
                 .append("<!DOCTYPE html>\n")
diff --git a/javalinfly-core/src/main/java/com/quicklink/javalinfly/processor/utils/ResourceUtil.java b/javalinfly-core/src/main/java/com/quicklink/javalinfly/processor/utils/ResourceUtil.java
new file mode 100644
index 0000000..242a31b
--- /dev/null
+++ b/javalinfly-core/src/main/java/com/quicklink/javalinfly/processor/utils/ResourceUtil.java
@@ -0,0 +1,28 @@
+package com.quicklink.javalinfly.processor.utils;
+
+
+import java.io.BufferedReader;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.UncheckedIOException;
+import java.util.stream.Collectors;
+
+public class ResourceUtil {
+
+  public static String readResourceFile(String fileName) {
+    try (InputStream inputStream = ResourceUtil.class.getResourceAsStream(
+        "/" + fileName)) {
+      if(inputStream == null) {
+        throw new FileNotFoundException("Resource '%s' not found!".formatted(fileName));
+      }
+      try (BufferedReader reader = new BufferedReader(
+          new InputStreamReader(inputStream))) {
+        return reader.lines().collect(Collectors.joining(System.lineSeparator()));
+      }
+    } catch (IOException e) {
+      throw new UncheckedIOException(e);
+    }
+  }
+}
diff --git a/javalinfly-example-kotlin/pom.xml b/javalinfly-example-kotlin/pom.xml
index 357d28b..0bed558 100644
--- a/javalinfly-example-kotlin/pom.xml
+++ b/javalinfly-example-kotlin/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.github.unldenis</groupId>
     <artifactId>JavalinFly</artifactId>
-    <version>0.1.8rc12</version>
+    <version>0.1.8rc13</version>
   </parent>
 
   <artifactId>javalinfly-example-kotlin</artifactId>
diff --git a/javalinfly-example/pom.xml b/javalinfly-example/pom.xml
index 989e908..fae70b2 100644
--- a/javalinfly-example/pom.xml
+++ b/javalinfly-example/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>com.github.unldenis</groupId>
         <artifactId>JavalinFly</artifactId>
-        <version>0.1.8rc12</version>
+        <version>0.1.8rc13</version>
     </parent>
 
     <artifactId>javalinfly-example</artifactId>
diff --git a/javalinfly-kotlin/pom.xml b/javalinfly-kotlin/pom.xml
index 304a68e..61ea944 100644
--- a/javalinfly-kotlin/pom.xml
+++ b/javalinfly-kotlin/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.github.unldenis</groupId>
     <artifactId>JavalinFly</artifactId>
-    <version>0.1.8rc12</version>
+    <version>0.1.8rc13</version>
   </parent>
 
   <artifactId>javalinfly-kotlin</artifactId>
diff --git a/pom.xml b/pom.xml
index 78ff9d1..dc4be49 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
   <groupId>com.github.unldenis</groupId>
   <artifactId>JavalinFly</artifactId>
-  <version>0.1.8rc12</version>
+  <version>0.1.8rc13</version>
   <packaging>pom</packaging>
 
   <modules>