diff --git a/java_tools/ConfigDefinition.jar b/java_tools/ConfigDefinition.jar
index 9717ffe621..0834a690e5 100644
Binary files a/java_tools/ConfigDefinition.jar and b/java_tools/ConfigDefinition.jar differ
diff --git a/java_tools/configuration_definition/src/com/rusefi/ConfigDefinition.java b/java_tools/configuration_definition/src/com/rusefi/ConfigDefinition.java
index 58a45d160d..63d7a6071c 100644
--- a/java_tools/configuration_definition/src/com/rusefi/ConfigDefinition.java
+++ b/java_tools/configuration_definition/src/com/rusefi/ConfigDefinition.java
@@ -593,18 +593,17 @@ public class ConfigDefinition {
 
     private static long getCrc32(String fileName) throws IOException {
         File file = new File(fileName);
-        byte[] f1 = Files.readAllBytes(file.toPath());
+        byte[] fileContent = Files.readAllBytes(file.toPath());
+        for (int i = 0; i < fileContent.length; i++) {
+            byte aByte = fileContent[i];
+            if (aByte == '\r')
+                throw new IllegalStateException("CR \\r 0x0D byte not allowed in cacheable content " + fileName + " at index=" + i);
+        }
         CRC32 c = new CRC32();
-        c.update(f1, 0, f1.length);
+        c.update(fileContent, 0, fileContent.length);
         return c.getValue();
     }
 
-    private static void deleteFile(String fileName) throws IOException {
-        File file = new File(fileName);
-        // todo: validate?
-        file.delete();
-    }
-
     private static byte[] unzipFileContents(String zipFileName, String fileName) throws IOException {
         ZipInputStream zis = new ZipInputStream(new FileInputStream(zipFileName));
         ZipEntry zipEntry;