diff --git a/solutions/4_reflex-game/package-lock.json b/solutions/4_reflex-game/package-lock.json
index 2ee523c..1f4bfeb 100644
--- a/solutions/4_reflex-game/package-lock.json
+++ b/solutions/4_reflex-game/package-lock.json
@@ -2331,7 +2331,7 @@
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       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/css-what/-/css-what-2.1.0.tgz",
-      "integrity": "sha1-lGfQMsOM+u+58teVASUwYvh/ob0="
+      "integrity": "sha512-HtdI8TqiYjVrBI0C2VLF8fwphIa49EaHPVo64hrX+QHCPBtjp2FW1g4+jNeC6v7bBSr2z7v2USnQ6GU+VPOzgQ=="
     },
     "cssesc": {
       "version": "0.1.0",
@@ -3910,7 +3910,8 @@
         },
         "ansi-regex": {
           "version": "2.1.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -3928,11 +3929,13 @@
         },
         "balanced-match": {
           "version": "1.0.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
+          "optional": true,
           "requires": {
             "balanced-match": "1.0.0",
             "concat-map": "0.0.1"
@@ -3945,15 +3948,18 @@
         },
         "code-point-at": {
           "version": "1.1.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "concat-map": {
           "version": "0.0.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "core-util-is": {
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@@ -4056,7 +4062,8 @@
         },
         "inherits": {
           "version": "2.0.3",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
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@@ -4066,6 +4073,7 @@
         "is-fullwidth-code-point": {
           "version": "1.0.0",
           "bundled": true,
+          "optional": true,
           "requires": {
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           }
@@ -4078,17 +4086,20 @@
         "minimatch": {
           "version": "3.0.4",
           "bundled": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "1.1.11"
           }
         },
         "minimist": {
           "version": "0.0.8",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "minipass": {
           "version": "2.2.4",
           "bundled": true,
+          "optional": true,
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             "yallist": "3.0.2"
@@ -4105,6 +4116,7 @@
         "mkdirp": {
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           "bundled": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -4177,7 +4189,8 @@
         },
         "number-is-nan": {
           "version": "1.0.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
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           "version": "4.1.1",
@@ -4187,6 +4200,7 @@
         "once": {
           "version": "1.4.0",
           "bundled": true,
+          "optional": true,
           "requires": {
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           }
@@ -4262,7 +4276,8 @@
         },
         "safe-buffer": {
           "version": "5.1.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
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@@ -4292,6 +4307,7 @@
         "string-width": {
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           "bundled": true,
+          "optional": true,
           "requires": {
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@@ -4309,6 +4325,7 @@
         "strip-ansi": {
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           "bundled": true,
+          "optional": true,
           "requires": {
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           }
@@ -4347,11 +4364,13 @@
         },
         "wrappy": {
           "version": "1.0.2",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.2",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         }
       }
     },