diff --git a/package-lock.json b/package-lock.json
index a440730..4eb0261 100644
--- a/package-lock.json
+++ b/package-lock.json
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@@ -4789,12 +4883,14 @@
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@@ -5638,12 +5769,6 @@
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-      "integrity": "sha1-eaKp7OfwlugPNtKy87wWwf9L8/o=",
-      "dev": true
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@@ -7213,9 +7338,9 @@
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+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/merge/-/merge-2.1.1.tgz",
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@@ -11498,6 +11623,12 @@
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       "dev": true
     },
+    "picomatch": {
+      "version": "2.2.3",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.2.3.tgz",
+      "integrity": "sha512-KpELjfwcCDUb9PeigTs2mBJzXUPzAuP2oPcA989He8Rte0+YUAjw1JVedDhuTKPkHjSYzMN3npC9luThGYEKdg==",
+      "dev": true
+    },
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       "resolved": "https://registry.npmjs.org/pidtree/-/pidtree-0.3.0.tgz",
@@ -11789,15 +11920,6 @@
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-      "resolved": "https://registry.npmjs.org/rechoir/-/rechoir-0.6.2.tgz",
-      "integrity": "sha1-hSBLVNuoLVdC4oyWdW70OvUOM4Q=",
-      "dev": true,
-      "requires": {
-        "resolve": "^1.1.6"
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       "resolved": "https://registry.npmjs.org/redent/-/redent-2.0.0.tgz",
@@ -12070,18 +12192,15 @@
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-      "resolved": "https://registry.npmjs.org/run-async/-/run-async-2.3.0.tgz",
-      "integrity": "sha1-A3GrSuC91yDUFm19/aZP96RFpsA=",
-      "dev": true,
-      "requires": {
-        "is-promise": "^2.1.0"
-      }
+      "version": "2.4.1",
+      "resolved": "https://registry.npmjs.org/run-async/-/run-async-2.4.1.tgz",
+      "integrity": "sha512-tvVnVv01b8c1RrA6Ep7JkStj85Guv/YrMcwqYQnwjsAS2cTmmPGBBjAjpCW7RrSodNSoE2/qg9O4bceNvUuDgQ==",
+      "dev": true
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     "rxjs": {
-      "version": "6.5.2",
-      "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-6.5.2.tgz",
-      "integrity": "sha512-HUb7j3kvb7p7eCUHE3FqjoDsC1xfZQ4AHFWfTKSpZ+sAhhz5X1WX0ZuUqWbzB2QhSLp3DoLUG+hMdEDKqWo2Zg==",
+      "version": "6.6.7",
+      "resolved": "https://registry.npmjs.org/rxjs/-/rxjs-6.6.7.tgz",
+      "integrity": "sha512-hTdwr+7yYNIT5n4AMYp85KA6yw2Va0FLa3Rguvbpa4W3I5xynaBZo41cM3XM+4Q6fRMj3sBYIR1VAmZMXYJvRQ==",
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@@ -13401,17 +13520,6 @@
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-    "shelljs": {
-      "version": "0.7.6",
-      "resolved": "https://registry.npmjs.org/shelljs/-/shelljs-0.7.6.tgz",
-      "integrity": "sha1-N5zM+1a5HIYB5HkzVutTgpJN6a0=",
-      "dev": true,
-      "requires": {
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-        "interpret": "^1.0.0",
-        "rechoir": "^0.6.2"
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       "resolved": "https://registry.npmjs.org/shellwords/-/shellwords-0.1.1.tgz",
diff --git a/package.json b/package.json
index f848b4f..3b2ac73 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,7 @@
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     "@commitlint/config-conventional": "8.0.0",
     "@types/jest": "24.0.15",
-    "commitizen": "3.1.1",
+    "commitizen": "4.2.4",
     "cz-conventional-changelog": "2.1.0",
     "dtslint": "0.8.0",
     "jest": "24.8.0",