diff --git a/src/core/config/Categories.json b/src/core/config/Categories.json
index 1f309d82..de3ea882 100644
--- a/src/core/config/Categories.json
+++ b/src/core/config/Categories.json
@@ -76,7 +76,8 @@
             "Rison Encode",
             "Rison Decode",
             "To Modhex",
-            "From Modhex"
+            "From Modhex",
+            "MIME Decoding"
         ]
     },
     {
diff --git a/src/core/operations/MIMEDecoding.mjs b/src/core/operations/MIMEDecoding.mjs
index 2d7eac99..7b52fbdd 100644
--- a/src/core/operations/MIMEDecoding.mjs
+++ b/src/core/operations/MIMEDecoding.mjs
@@ -4,12 +4,12 @@
  * @license Apache-2.0
  */
 
-import Operation from "../Operation";
-import OperationError from "../errors/OperationError";
-import Utils from "../Utils";
+import Operation from "../Operation.mjs";
+import OperationError from "../errors/OperationError.mjs";
+import Utils from "../Utils.mjs";
 import { fromHex } from "../lib/Hex.mjs";
-import { fromBase64 } from "../lib/Base64";
-import cptable from "../vendor/js-codepage/cptable.js";
+import { fromBase64 } from "../lib/Base64.mjs";
+import cptable from "codepage";
 
 /**
  * MIME Decoding operation
diff --git a/tests/operations/index.mjs b/tests/operations/index.mjs
index 0f61fd90..a82bc874 100644
--- a/tests/operations/index.mjs
+++ b/tests/operations/index.mjs
@@ -104,7 +104,7 @@ import "./tests/LZNT1Decompress.mjs";
 import "./tests/LZString.mjs";
 import "./tests/Magic.mjs";
 import "./tests/Media.mjs";
-import "./tests/MIMEDecoding";
+import "./tests/MIMEDecoding.mjs";
 import "./tests/Modhex.mjs";
 import "./tests/MorseCode.mjs";
 import "./tests/MS.mjs";