diff --git a/package-lock.json b/package-lock.json
index 2aee2e9..1d3be04 100644
--- a/package-lock.json
+++ b/package-lock.json
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+        }
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+        }
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+        }
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+          "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.13.0.tgz",
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+        }
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+        }
       }
     },
     "@babel/code-frame": {
@@ -2281,6 +2343,14 @@
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+      },
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+          "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.13.0.tgz",
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+        }
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@@ -2612,7 +2682,8 @@
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       "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "constants-browserify": {
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@@ -4524,7 +4595,8 @@
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           "version": "5.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
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@@ -4624,12 +4696,14 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
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@@ -9147,6 +9221,13 @@
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         "tslib": "^1.9.0"
+      },
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+          "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.13.0.tgz",
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+        }
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@@ -10542,9 +10623,9 @@
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-      "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.9.3.tgz",
-      "integrity": "sha512-4krF8scpejhaOgqzBEcGM7yDIEfi0/8+8zDRZhNZZ2kjmHJ4hv3zCbQWxoJGz1iw5U0Jl0nma13xzHXcncMavQ=="
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.0.0.tgz",
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@@ -10574,6 +10655,12 @@
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+        "tslib": {
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+          "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.13.0.tgz",
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+          "dev": true
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@@ -10584,6 +10671,14 @@
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+      },
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+          "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.13.0.tgz",
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+          "dev": true
+        }
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     "tty-browserify": {
diff --git a/package.json b/package.json
index 8c07d6d..9dba019 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "core-js": "^2.5.4",
     "firebase": "^5.6.0",
     "rxjs": "~6.3.3",
-    "tslib": "^1.9.0",
+    "tslib": "^2.0.0",
     "zone.js": "~0.8.26"
   },
   "devDependencies": {