diff --git a/package-lock.json b/package-lock.json
index e4d14da..13adafc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -539,20 +539,20 @@
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-      "resolved": "https://registry.npmjs.org/concurrently/-/concurrently-4.0.1.tgz",
-      "integrity": "sha512-D8UI+mlI/bfvrA57SeKOht6sEpb01dKk+8Yee4fbnkk1Ue8r3S+JXoEdFZIpzQlXJGtnxo47Wvvg/kG4ba3U6Q==",
+      "version": "4.1.2",
+      "resolved": "https://registry.npmjs.org/concurrently/-/concurrently-4.1.2.tgz",
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       "dev": true,
       "requires": {
-        "chalk": "^2.4.1",
-        "date-fns": "^1.23.0",
-        "lodash": "^4.17.10",
+        "chalk": "^2.4.2",
+        "date-fns": "^1.30.1",
+        "lodash": "^4.17.15",
         "read-pkg": "^4.0.1",
-        "rxjs": "6.2.2",
+        "rxjs": "^6.5.2",
         "spawn-command": "^0.0.2-1",
         "supports-color": "^4.5.0",
-        "tree-kill": "^1.1.0",
-        "yargs": "^12.0.1"
+        "tree-kill": "^1.2.1",
+        "yargs": "^12.0.5"
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     "connect": {
@@ -1084,9 +1084,9 @@
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-      "resolved": "https://registry.npmjs.org/is-core-module/-/is-core-module-2.0.0.tgz",
-      "integrity": "sha512-jq1AH6C8MuteOoBPwkxHafmByhL9j5q4OaPGdbuD+ZtQJVzH+i6E3BJDQcBA09k57i2Hh2yQbEG8yObZ0jdlWw==",
+      "version": "2.8.0",
+      "resolved": "https://registry.npmjs.org/is-core-module/-/is-core-module-2.8.0.tgz",
+      "integrity": "sha512-vd15qHsaqrRL7dtH6QNuy0ndJmRDrS9HAM1CAiSifNUFv4x1a0CCVsj18hJ1mShxIG6T2i1sO78MkP56r0nYRw==",
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@@ -1694,9 +1694,9 @@
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-      "resolved": "https://registry.npmjs.org/path-parse/-/path-parse-1.0.6.tgz",
-      "integrity": "sha512-GSmOT2EbHrINBf9SR7CDELwlJ8AENk3Qn7OikK4nFYAu3Ote2+JYNVvkpAEQm3/TLNEJFD/xZJjzyxg3KBWOzw==",
+      "version": "1.0.7",
+      "resolved": "https://registry.npmjs.org/path-parse/-/path-parse-1.0.7.tgz",
+      "integrity": "sha512-LDJzPVEEEPR+y48z93A0Ed0yXb8pAByGWo/k5YYdYgpY2/2EsOsksJrq7lOHxryrVOn1ejG6oAp8ahvOIQD8sw==",
       "dev": true
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     "picomatch": {
@@ -1794,12 +1794,12 @@
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-      "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.18.1.tgz",
-      "integrity": "sha512-lDfCPaMKfOJXjy0dPayzPdF1phampNWr3qFCjAu+rw/qbQmr5jWH5xN2hwh9QKfw9E5v4hwV7A+jrCmL8yjjqA==",
+      "version": "1.20.0",
+      "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.20.0.tgz",
+      "integrity": "sha512-wENBPt4ySzg4ybFQW2TT1zMQucPK95HSh/nq2CFTZVOGut2+pQvSsgtda4d26YrYcr067wjbmzOG8byDPBX63A==",
       "dev": true,
       "requires": {
-        "is-core-module": "^2.0.0",
+        "is-core-module": "^2.2.0",
         "path-parse": "^1.0.6"
       }
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@@ -1831,9 +1831,9 @@
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-      "version": "6.2.2",
-      "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-6.2.2.tgz",
-      "integrity": "sha512-0MI8+mkKAXZUF9vMrEoPnaoHkfzBPP4IGwUYRJhIRJF6/w3uByO1e91bEHn8zd43RdkTMKiooYKmwz7RH6zfOQ==",
+      "version": "6.6.7",
+      "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-6.6.7.tgz",
+      "integrity": "sha512-hTdwr+7yYNIT5n4AMYp85KA6yw2Va0FLa3Rguvbpa4W3I5xynaBZo41cM3XM+4Q6fRMj3sBYIR1VAmZMXYJvRQ==",
       "dev": true,
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@@ -2021,9 +2021,9 @@
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-      "version": "3.0.3",
-      "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.3.tgz",
-      "integrity": "sha512-VUJ49FC8U1OxwZLxIbTTrDvLnf/6TDgxZcK8wxR8zs13xpx7xbG60ndBlhNrFi2EMuFRoeDoJO7wthSLq42EjA==",
+      "version": "3.0.6",
+      "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.6.tgz",
+      "integrity": "sha512-sDl4qMFpijcGw22U5w63KmD3cZJfBuFlVNbVMKje2keoKML7X2UzWbc4XrmEbDwg0NXJc3yv4/ox7b+JWb57kQ==",
       "dev": true
     },
     "socket.io": {
@@ -2217,9 +2217,9 @@
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     "spdx-license-ids": {
-      "version": "3.0.6",
-      "resolved": "https://registry.npmjs.org/spdx-license-ids/-/spdx-license-ids-3.0.6.tgz",
-      "integrity": "sha512-+orQK83kyMva3WyPf59k1+Y525csj5JejicWut55zeTWANuN17qSiSLUXWtzHeNWORSvT7GLDJ/E/XiIWoXBTw==",
+      "version": "3.0.11",
+      "resolved": "https://registry.npmjs.org/spdx-license-ids/-/spdx-license-ids-3.0.11.tgz",
+      "integrity": "sha512-Ctl2BrFiM0X3MANYgj3CkygxhRmr9mi6xhejbdO960nF6EDJApTYpn0BQnDKlnNBULKiCN1n3w9EBkHK8ZWg+g==",
       "dev": true
     },
     "statuses": {
diff --git a/package.json b/package.json
index 14a0ead..10f09a8 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
   "devDependencies": {
     "@types/d3": "3.5.44",
     "@types/webmidi": "2.0.4",
-    "concurrently": "4.0.1",
+    "concurrently": "4.1.2",
     "d3": "3.5.17",
     "lite-server": "1.3.4",
     "typescript": "4.0.5"