diff --git a/package-lock.json b/package-lock.json
index d226f7c..d41849d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "@ngx-progressbar/demo",
-  "version": "3.0.2",
+  "version": "4.0.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -107,7 +107,7 @@
         "postcss-url": "7.3.0",
         "raw-loader": "0.5.1",
         "resolve": "1.5.0",
-        "rxjs": "5.5.2",
+        "rxjs": "5.5.6",
         "sass-loader": "6.0.6",
         "semver": "5.4.1",
         "silent-error": "1.1.0",
@@ -5799,7 +5799,7 @@
         "rollup": "0.53.4",
         "rollup-plugin-commonjs": "8.2.6",
         "rollup-plugin-node-resolve": "3.0.2",
-        "rxjs": "5.5.2",
+        "rxjs": "5.5.6",
         "sorcery": "0.10.0",
         "stylus": "0.54.5",
         "uglify-js": "3.3.7"
@@ -9196,11 +9196,11 @@
       }
     },
     "rxjs": {
-      "version": "5.5.2",
-      "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-5.5.2.tgz",
-      "integrity": "sha512-oRYoIKWBU3Ic37fLA5VJu31VqQO4bWubRntcHSJ+cwaDQBwdnZ9x4zmhJfm/nFQ2E82/I4loSioHnACamrKGgA==",
+      "version": "5.5.6",
+      "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-5.5.6.tgz",
+      "integrity": "sha512-v4Q5HDC0FHAQ7zcBX7T2IL6O5ltl1a2GX4ENjPXg6SjDY69Cmx9v4113C99a4wGF16ClPv5Z8mghuYorVkg/kg==",
       "requires": {
-        "symbol-observable": "1.0.4"
+        "symbol-observable": "1.0.1"
       }
     },
     "safe-buffer": {
@@ -10312,9 +10312,9 @@
       }
     },
     "symbol-observable": {
-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/symbol-observable/-/symbol-observable-1.0.4.tgz",
-      "integrity": "sha1-Kb9hXUqnEhvdiYsi1LP5vE4qoD0="
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/symbol-observable/-/symbol-observable-1.0.1.tgz",
+      "integrity": "sha1-g0D8RwLDEi310iKI+IKD9RPT/dQ="
     },
     "tapable": {
       "version": "0.2.8",