diff --git a/composer.json b/composer.json
index 02037def1..2fe93d2b2 100644
--- a/composer.json
+++ b/composer.json
@@ -46,7 +46,7 @@
       "pocketmine/uuid": "^0.1.0",
       "pocketmine/color": "^0.1.0",
       "adhocore/json-comment": "^0.1.0",
-      "netresearch/jsonmapper": "^2.0",
+      "netresearch/jsonmapper": "^3.1.1",
       "respect/validation": "^2.0",
       "composer-runtime-api": "^2.0"
    },
diff --git a/composer.lock b/composer.lock
index 6e2090ba6..8867810ea 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "b96dbf17a1d0fed7b4545e72afbae5b4",
+    "content-hash": "0c3e5c9b592778a5c4421bde7dd12d4a",
     "packages": [
         {
             "name": "adhocore/json-comment",
@@ -207,16 +207,16 @@
         },
         {
             "name": "netresearch/jsonmapper",
-            "version": "v2.1.0",
+            "version": "v3.1.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/cweiske/jsonmapper.git",
-                "reference": "e0f1e33a71587aca81be5cffbb9746510e1fe04e"
+                "reference": "ba09f0e456d4f00cef84e012da5715625594407c"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/cweiske/jsonmapper/zipball/e0f1e33a71587aca81be5cffbb9746510e1fe04e",
-                "reference": "e0f1e33a71587aca81be5cffbb9746510e1fe04e",
+                "url": "https://api.github.com/repos/cweiske/jsonmapper/zipball/ba09f0e456d4f00cef84e012da5715625594407c",
+                "reference": "ba09f0e456d4f00cef84e012da5715625594407c",
                 "shasum": ""
             },
             "require": {
@@ -252,9 +252,9 @@
             "support": {
                 "email": "cweiske@cweiske.de",
                 "issues": "https://github.com/cweiske/jsonmapper/issues",
-                "source": "https://github.com/cweiske/jsonmapper/tree/master"
+                "source": "https://github.com/cweiske/jsonmapper/tree/v3.1.1"
             },
-            "time": "2020-04-16T18:48:43+00:00"
+            "time": "2020-11-02T19:19:54+00:00"
         },
         {
             "name": "pocketmine/binaryutils",