diff --git a/package-lock.json b/package-lock.json
index a966f99..dc01cb2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9496,9 +9496,9 @@
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         },
         "highlight.js": {
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-            "resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-9.13.1.tgz",
-            "integrity": "sha512-Sc28JNQNDzaH6PORtRLMvif9RSn1mYuOoX3omVjnb0+HbpPygU2ALBI0R/wsiqCb4/fcp07Gdo8g+fhtFrQl6A=="
+            "version": "9.18.1",
+            "resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-9.18.1.tgz",
+            "integrity": "sha512-OrVKYz70LHsnCgmbXctv/bfuvntIKDz177h0Co37DQ5jamGZLVmoCVMtjMtNZY3X9DrCcKfklHPNeA0uPZhSJg=="
         },
         "history": {
             "version": "4.7.2",
@@ -15674,15 +15674,38 @@
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         "react-split-pane": {
-            "version": "0.1.85",
-            "resolved": "https://registry.npmjs.org/react-split-pane/-/react-split-pane-0.1.85.tgz",
-            "integrity": "sha512-3GhaYs6+eVNrewgN4eQKJoNMQ4pcegNMTMhR5bO/NFO91K6/98qdD1sCuWPpsefCjzxNTjkvVYWQC0bMaC45mA==",
+            "version": "0.1.91",
+            "resolved": "https://registry.npmjs.org/react-split-pane/-/react-split-pane-0.1.91.tgz",
+            "integrity": "sha512-8U56HOKQGFlvXXT1PaHbijjYy2W8g0iQaHC99Q2aV4yYfvUURcRGyfPKN3scGkbYN2pvy3qyoEwHyewUmR1VbQ==",
             "requires": {
-                "prop-types": "^15.5.10",
-                "react": "^16.6.3",
-                "react-dom": "^16.6.3",
+                "prop-types": "^15.7.2",
                 "react-lifecycles-compat": "^3.0.4",
-                "react-style-proptype": "^3.0.0"
+                "react-style-proptype": "^3.2.2"
+            },
+            "dependencies": {
+                "loose-envify": {
+                    "version": "1.4.0",
+                    "resolved": "https://registry.npmjs.org/loose-envify/-/loose-envify-1.4.0.tgz",
+                    "integrity": "sha512-lyuxPGr/Wfhrlem2CL/UcnUc1zcqKAImBDzukY7Y5F/yQiNdko6+fRLevlw1HgMySw7f611UIY408EtxRSoK3Q==",
+                    "requires": {
+                        "js-tokens": "^3.0.0 || ^4.0.0"
+                    }
+                },
+                "prop-types": {
+                    "version": "15.7.2",
+                    "resolved": "https://registry.npmjs.org/prop-types/-/prop-types-15.7.2.tgz",
+                    "integrity": "sha512-8QQikdH7//R2vurIJSutZ1smHYTcLpRWEOlHnzcWHmBYrOGUysKwSsrC89BCiFj3CbrfJ/nXFdJepOVrY1GCHQ==",
+                    "requires": {
+                        "loose-envify": "^1.4.0",
+                        "object-assign": "^4.1.1",
+                        "react-is": "^16.8.1"
+                    }
+                },
+                "react-is": {
+                    "version": "16.13.1",
+                    "resolved": "https://registry.npmjs.org/react-is/-/react-is-16.13.1.tgz",
+                    "integrity": "sha512-24e6ynE2H+OKt4kqsOvNd8kBpV65zoxbA4BVsEOB3ARVWQki/DHzaUoC5KuON/BiccDaCCTZBuOcfZs70kR8bQ=="
+                }
             }
         },
         "react-style-proptype": {
diff --git a/package.json b/package.json
index 214fa6b..1e7f03f 100644
--- a/package.json
+++ b/package.json
@@ -42,7 +42,7 @@
     "react": "16.7.0",
     "react-dom": "16.7.0",
     "react-router-dom": "4.3.1",
-    "react-split-pane": "0.1.85",
+    "react-split-pane": "0.1.91",
     "typography": "0.16.18",
     "typography-theme-github": "^0.16.18"
   },