diff --git a/guessthenumber/package-lock.json b/guessthenumber/package-lock.json
index 5187136..de76781 100644
--- a/guessthenumber/package-lock.json
+++ b/guessthenumber/package-lock.json
@@ -1401,7 +1401,8 @@
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               "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-2.2.1.tgz",
               "integrity": "sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4=",
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "assert-plus": {
               "version": "0.2.0",
@@ -1429,6 +1430,7 @@
               "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
               "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
               "dev": true,
+              "optional": true,
               "requires": {
                 "ansi-styles": "2.2.1",
                 "escape-string-regexp": "1.0.5",
@@ -1514,7 +1516,8 @@
               "version": "2.0.0",
               "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
               "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "tunnel-agent": {
               "version": "0.4.3",
@@ -3409,6 +3412,7 @@
       "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",
@@ -3985,9 +3989,9 @@
       }
     },
     "bootstrap": {
-      "version": "4.1.1",
-      "resolved": "https://registry.npmjs.org/bootstrap/-/bootstrap-4.1.1.tgz",
-      "integrity": "sha512-SpiDSOcbg4J/PjVSt4ny5eY6j74VbVSjROY4Fb/WIUXBV9cnb5luyR4KnPvNoXuGnBK1T+nJIWqRsvU3yP8Mcg=="
+      "version": "4.3.1",
+      "resolved": "https://registry.npmjs.org/bootstrap/-/bootstrap-4.3.1.tgz",
+      "integrity": "sha512-rXqOmH1VilAt2DyPzluTi2blhk17bO7ef+zLLPlWvG494pDxcM234pJ8wTc/6R40UWizAIIMgxjvxZg5kmsbag=="
     },
     "brace-expansion": {
       "version": "1.1.8",
@@ -5949,6 +5953,7 @@
       "resolved": "https://registry.npmjs.org/fstream/-/fstream-1.0.11.tgz",
       "integrity": "sha1-XB+x8RdHcRTwYyoOtLcbPLD9MXE=",
       "dev": true,
+      "optional": true,
       "requires": {
         "graceful-fs": "4.1.11",
         "inherits": "2.0.3",
@@ -7747,7 +7752,8 @@
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/longest/-/longest-1.0.1.tgz",
       "integrity": "sha1-MKCy2jj3N3DoKUoNIuZiXtd9AJc=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "loose-envify": {
       "version": "1.3.1",
diff --git a/guessthenumber/package.json b/guessthenumber/package.json
index 7cc9450..0c6db34 100644
--- a/guessthenumber/package.json
+++ b/guessthenumber/package.json
@@ -20,7 +20,7 @@
     "@angular/platform-browser": "^6.0.3",
     "@angular/platform-browser-dynamic": "^6.0.3",
     "@angular/router": "^6.0.3",
-    "bootstrap": "^4.1.1",
+    "bootstrap": "^4.3.1",
     "core-js": "^2.5.4",
     "rxjs": "^6.0.0",
     "zone.js": "^0.8.26"