diff --git a/package-lock.json b/package-lock.json
index 9f2982b..36f3406 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -760,6 +760,7 @@
       "resolved": "https://registry.npmjs.org/align-text/-/align-text-0.1.4.tgz",
       "integrity": "sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=",
       "dev": true,
+      "optional": true,
       "requires": {
         "kind-of": "3.2.2",
         "longest": "1.0.1",
@@ -2348,9 +2349,9 @@
       "dev": true
     },
     "codemirror": {
-      "version": "5.43.0",
-      "resolved": "https://registry.npmjs.org/codemirror/-/codemirror-5.43.0.tgz",
-      "integrity": "sha512-mljwQWUaWIf85I7QwTBryF2ASaIvmYAL4s5UCanCJFfKeXOKhrqdHWdHiZWAMNT+hjLTCnVx2S/SYTORIgxsgA=="
+      "version": "5.58.2",
+      "resolved": "https://registry.npmjs.org/codemirror/-/codemirror-5.58.2.tgz",
+      "integrity": "sha512-K/hOh24cCwRutd1Mk3uLtjWzNISOkm4fvXiMO7LucCrqbh6aJDdtqUziim3MZUI6wOY0rvY1SlL1Ork01uMy6w=="
     },
     "collapse-white-space": {
       "version": "1.0.4",
@@ -6575,7 +6576,8 @@
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/longest/-/longest-1.0.1.tgz",
       "integrity": "sha1-MKCy2jj3N3DoKUoNIuZiXtd9AJc=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "longest-streak": {
       "version": "2.0.2",
@@ -11523,14 +11525,6 @@
       "integrity": "sha1-J5siXfHVgrH1TmWt3UNS4Y+qBxM=",
       "dev": true
     },
-    "string_decoder": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.0.3.tgz",
-      "integrity": "sha512-4AH6Z5fzNNBcH+6XDMfA/BTt87skxqJlO0lAh3Dker5zThcAxG6mKz+iGu308UKoPPQ8Dcqx/4JhujzltRa+hQ==",
-      "requires": {
-        "safe-buffer": "5.1.1"
-      }
-    },
     "string-width": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-2.1.1.tgz",
@@ -11564,6 +11558,14 @@
         }
       }
     },
+    "string_decoder": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.0.3.tgz",
+      "integrity": "sha512-4AH6Z5fzNNBcH+6XDMfA/BTt87skxqJlO0lAh3Dker5zThcAxG6mKz+iGu308UKoPPQ8Dcqx/4JhujzltRa+hQ==",
+      "requires": {
+        "safe-buffer": "5.1.1"
+      }
+    },
     "stringify-entities": {
       "version": "1.3.2",
       "resolved": "https://registry.npmjs.org/stringify-entities/-/stringify-entities-1.3.2.tgz",
diff --git a/package.json b/package.json
index 408f8ac..6c028a4 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
     "async": "^2.6.1",
     "autosize": "^4.0.2",
     "brace": "^0.11.1",
-    "codemirror": "^5.43.0",
+    "codemirror": "^5.58.2",
     "decimal.js": "7.2.3",
     "enhanced-resolve": "^4.0.0",
     "escodegen": "^1.11.0",