diff --git a/package-lock.json b/package-lock.json
index 7edd5f07..401d8078 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,7 @@
       "version": "1.5.16",
       "license": "GPL-3.0-only",
       "dependencies": {
-        "codemirror": "5.59.3",
+        "codemirror": "5.59.4",
         "db-to-cloud": "^0.6.0",
         "jsonlint": "^1.6.3",
         "less-bundle": "github:openstyles/less-bundle#v0.1.0",
@@ -2362,9 +2362,9 @@
       }
     },
     "node_modules/codemirror": {
-      "version": "5.59.3",
-      "resolved": "https://registry.npmjs.org/codemirror/-/codemirror-5.59.3.tgz",
-      "integrity": "sha512-p1d4BjmBBssgnEGtQeWvE5PdiDffqZjiJ77h2FZ2J2BpW9qdOzf6v7IQscyE+TgyKBQS3PpsYimfEDNgcNRZGQ=="
+      "version": "5.59.4",
+      "resolved": "https://registry.npmjs.org/codemirror/-/codemirror-5.59.4.tgz",
+      "integrity": "sha512-achw5JBgx8QPcACDDn+EUUXmCYzx/zxEtOGXyjvLEvYY8GleUrnfm5D+Zb+UjShHggXKDT9AXrbkBZX6a0YSQg=="
     },
     "node_modules/collection-visit": {
       "version": "1.0.0",
@@ -13942,9 +13942,9 @@
       }
     },
     "codemirror": {
-      "version": "5.59.3",
-      "resolved": "https://registry.npmjs.org/codemirror/-/codemirror-5.59.3.tgz",
-      "integrity": "sha512-p1d4BjmBBssgnEGtQeWvE5PdiDffqZjiJ77h2FZ2J2BpW9qdOzf6v7IQscyE+TgyKBQS3PpsYimfEDNgcNRZGQ=="
+      "version": "5.59.4",
+      "resolved": "https://registry.npmjs.org/codemirror/-/codemirror-5.59.4.tgz",
+      "integrity": "sha512-achw5JBgx8QPcACDDn+EUUXmCYzx/zxEtOGXyjvLEvYY8GleUrnfm5D+Zb+UjShHggXKDT9AXrbkBZX6a0YSQg=="
     },
     "collection-visit": {
       "version": "1.0.0",
diff --git a/package.json b/package.json
index 81b05be9..b107ff44 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,7 @@
   "repository": "openstyles/stylus",
   "author": "Stylus Team",
   "dependencies": {
-    "codemirror": "5.59.3",
+    "codemirror": "5.59.4",
     "db-to-cloud": "^0.6.0",
     "jsonlint": "^1.6.3",
     "less-bundle": "github:openstyles/less-bundle#v0.1.0",
diff --git a/vendor/codemirror/README.md b/vendor/codemirror/README.md
index 2981101d..35ddb69c 100644
--- a/vendor/codemirror/README.md
+++ b/vendor/codemirror/README.md
@@ -1,4 +1,4 @@
-## codemirror v5.59.3
+## codemirror v5.59.4
 
 Following files are copied from npm (node_modules):
 
diff --git a/vendor/codemirror/lib/codemirror.css b/vendor/codemirror/lib/codemirror.css
index 5ea2d2be..a64f97c7 100644
--- a/vendor/codemirror/lib/codemirror.css
+++ b/vendor/codemirror/lib/codemirror.css
@@ -19,7 +19,7 @@
 }
 
 .CodeMirror-scrollbar-filler, .CodeMirror-gutter-filler {
-  background-color: transparent; /* The little square between H and V scrollbars */
+  background-color: white; /* The little square between H and V scrollbars */
 }
 
 /* GUTTER */