diff --git a/src/main/java/xyz/wagyourtail/jvmdg/cli/Flags.java b/src/main/java/xyz/wagyourtail/jvmdg/cli/Flags.java
index 0cfec9b3..d2f9c9fc 100644
--- a/src/main/java/xyz/wagyourtail/jvmdg/cli/Flags.java
+++ b/src/main/java/xyz/wagyourtail/jvmdg/cli/Flags.java
@@ -127,26 +127,32 @@ public File findJavaApi() {
             }
             synchronized (Flags.class) {
                 Constants.DIR.mkdirs();
-                Path tmp = Constants.DIR.toPath().resolve("jvmdg-api.jar");
+                Path tmp = Constants.DIR.toPath().resolve("jvmdg-api- " + jvmdgVersion + " .jar");
                 File prop = getJavaApiFromSystemProperty();
                 if (prop != null) {
                     return prop;
                 }
                 URL url = getJavaApiFromShade();
+                if (Files.exists(tmp)) {
+                    if (url == null) {
+                        foundApi = tmp.toFile();
+                        return tmp.toFile();
+                    } else {
+                        try (InputStream in = url.openStream()) {
+                            try (InputStream in2 = Files.newInputStream(tmp)) {
+                                if (hash(in).equals(hash(in2))) {
+                                    foundApi = tmp.toFile();
+                                    return tmp.toFile();
+                                }
+                            }
+                        }
+
+                    }
+                }
                 if (url == null && allowMaven) {
                     url = getJavaApiFromMaven();
                 }
                 if (url != null) {
-//                    if (Files.exists(tmp)) {
-//                        try (InputStream in = url.openStream()) {
-//                            try (InputStream in2 = Files.newInputStream(tmp)) {
-//                                if (hash(in).equals(hash(in2))) {
-//                                    foundApi = tmp.toFile();
-//                                    return tmp.toFile();
-//                                }
-//                            }
-//                        }
-//                    }
                     try (InputStream in = url.openStream()) {
                         Files.copy(in, tmp, StandardCopyOption.REPLACE_EXISTING);
                         foundApi = tmp.toFile();
@@ -160,23 +166,24 @@ public File findJavaApi() {
         }
     }
 
-//    private String hash(InputStream is) {
-//        MessageDigest digest = null;
-//        try {
-//            digest = MessageDigest.getInstance("SHA-1");
-//            byte[] buffer = new byte[8192];
-//            int read = 0;
-//            while ((read = is.read(buffer)) > 0) {
-//                digest.update(buffer, 0, read);
-//            }
-//            byte[] hash = digest.digest();
-//            StringBuilder sb = new StringBuilder();
-//            for (byte b : hash) {
-//                sb.append(String.format("%02x", b));
-//            }
-//            return sb.toString();
-//        } catch (Exception e) {
-//            throw new RuntimeException("Failed to hash", e);
-//        }
-//    }
+    private String hash(InputStream is) {
+        MessageDigest digest = null;
+        try {
+            digest = MessageDigest.getInstance("SHA-1");
+            byte[] buffer = new byte[8192];
+            int read = 0;
+            while ((read = is.read(buffer)) > 0) {
+                digest.update(buffer, 0, read);
+            }
+            byte[] hash = digest.digest();
+            StringBuilder sb = new StringBuilder();
+            for (byte b : hash) {
+                sb.append(String.format("%02x", b));
+            }
+            return sb.toString();
+        } catch (Exception e) {
+            throw new RuntimeException("Failed to hash", e);
+        }
+    }
+
 }