diff --git a/package-lock.json b/package-lock.json
index 3a37ce0..ac852f1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -237,9 +237,9 @@
       "dev": true
     },
     "codemirror": {
-      "version": "5.39.2",
-      "resolved": "https://registry.npmjs.org/codemirror/-/codemirror-5.39.2.tgz",
-      "integrity": "sha512-mchBy0kQ1Wggi+e58SmoLgKO4nG7s/BqNg6/6TRbhsnXI/KRG+fKAvRQ1LLhZZ6ZtUoDQ0dl5aMhE+IkSRh60Q=="
+      "version": "5.58.2",
+      "resolved": "https://registry.npmjs.org/codemirror/-/codemirror-5.58.2.tgz",
+      "integrity": "sha512-K/hOh24cCwRutd1Mk3uLtjWzNISOkm4fvXiMO7LucCrqbh6aJDdtqUziim3MZUI6wOY0rvY1SlL1Ork01uMy6w=="
     },
     "color-convert": {
       "version": "1.9.2",
@@ -732,6 +732,7 @@
           "version": "0.1.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "kind-of": "3.2.2",
             "longest": "1.0.1",
@@ -1674,7 +1675,8 @@
         "longest": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "lru-cache": {
           "version": "4.1.3",
diff --git a/package.json b/package.json
index 30272da..22c4687 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
 	},
 	"dependencies": {
 		"big-integer": "^1.6.34",
-		"codemirror": "^5.39.2"
+		"codemirror": "^5.58.2"
 	},
 	"devDependencies": {
 		"coveralls": "^3.0.2",