diff --git a/package-lock.json b/package-lock.json
index 3fa9052..35dd812 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -453,9 +453,9 @@
       }
     },
     "bootstrap": {
-      "version": "3.4.1",
-      "resolved": "https://registry.npmjs.org/bootstrap/-/bootstrap-3.4.1.tgz",
-      "integrity": "sha512-yN5oZVmRCwe5aKwzRj6736nSmKDX7pLYwsXiCj/EYmo16hODaBiT4En5btW/jhBF/seV+XMx3aYwukYC3A49DA=="
+      "version": "4.1.2",
+      "resolved": "https://registry.npmjs.org/bootstrap/-/bootstrap-4.1.2.tgz",
+      "integrity": "sha512-3bP609EdMc/8EwgGp8KgpN8HwnR4V4lZ9CTi5pImMrXNxpkw7dK1B05aMwQWpG1ZWmTLlBSN/uzkuz5GsmQNFA=="
     },
     "bootstrap-datepicker": {
       "version": "1.9.0",
@@ -4796,6 +4796,13 @@
         "typeahead.js-browserify": "~1.0.7",
         "woofmark": "git://github.com/jywarren/woofmark.git#xhrOptionsAltBureaucracy",
         "xhr": "~2.5.0"
+      },
+      "dependencies": {
+        "bootstrap": {
+          "version": "3.4.1",
+          "resolved": "https://registry.npmjs.org/bootstrap/-/bootstrap-3.4.1.tgz",
+          "integrity": "sha512-yN5oZVmRCwe5aKwzRj6736nSmKDX7pLYwsXiCj/EYmo16hODaBiT4En5btW/jhBF/seV+XMx3aYwukYC3A49DA=="
+        }
       }
     },
     "punycode": {
diff --git a/package.json b/package.json
index 521abbb..bbb60ed 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "url": "https://github.com/publiclab/inline-markdown-editor/issues"
   },
   "dependencies": {
-    "bootstrap": "~3.4.0",
+    "bootstrap": "~4.1.2",
     "font-awesome": "~4.7.0",
     "jquery": "~3",
     "megamark": "^3.2.2",