diff --git a/package-lock.json b/package-lock.json
index 9a403d5..f2fa40f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,7 @@
       "hasInstallScript": true,
       "license": "MIT",
       "dependencies": {
-        "@actions/core": "^1.2.7",
+        "@actions/core": "^1.6.0",
         "@actions/exec": "^1.0.4",
         "@actions/io": "^1.1.0",
         "@actions/tool-cache": "^1.6.1",
@@ -34,9 +34,12 @@
       }
     },
     "node_modules/@actions/core": {
-      "version": "1.2.7",
-      "resolved": "https://registry.npmjs.org/@actions/core/-/core-1.2.7.tgz",
-      "integrity": "sha512-kzLFD5BgEvq6ubcxdgPbRKGD2Qrgya/5j+wh4LZzqT915I0V3rED+MvjH6NXghbvk1MXknpNNQ3uKjXSEN00Ig=="
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/@actions/core/-/core-1.6.0.tgz",
+      "integrity": "sha512-NB1UAZomZlCV/LmJqkLhNTqtKfFXJZAUPcfl/zqG7EfsQdeUJtaWO98SGbuQ3pydJ3fHl2CvI/51OKYlCYYcaw==",
+      "dependencies": {
+        "@actions/http-client": "^1.0.11"
+      }
     },
     "node_modules/@actions/exec": {
       "version": "1.0.4",
@@ -47,9 +50,9 @@
       }
     },
     "node_modules/@actions/http-client": {
-      "version": "1.0.9",
-      "resolved": "https://registry.npmjs.org/@actions/http-client/-/http-client-1.0.9.tgz",
-      "integrity": "sha512-0O4SsJ7q+MK0ycvXPl2e6bMXV7dxAXOGjrXS1eTF9s2S401Tp6c/P3c3Joz04QefC1J6Gt942Wl2jbm3f4mLcg==",
+      "version": "1.0.11",
+      "resolved": "https://registry.npmjs.org/@actions/http-client/-/http-client-1.0.11.tgz",
+      "integrity": "sha512-VRYHGQV1rqnROJqdMvGUbY/Kn8vriQe/F9HR2AlYHzmKuM/p3kjNuXhmdBfcVgsvRWTz5C5XW5xvndZrVBuAYg==",
       "dependencies": {
         "tunnel": "0.0.6"
       }
@@ -9563,9 +9566,12 @@
   },
   "dependencies": {
     "@actions/core": {
-      "version": "1.2.7",
-      "resolved": "https://registry.npmjs.org/@actions/core/-/core-1.2.7.tgz",
-      "integrity": "sha512-kzLFD5BgEvq6ubcxdgPbRKGD2Qrgya/5j+wh4LZzqT915I0V3rED+MvjH6NXghbvk1MXknpNNQ3uKjXSEN00Ig=="
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/@actions/core/-/core-1.6.0.tgz",
+      "integrity": "sha512-NB1UAZomZlCV/LmJqkLhNTqtKfFXJZAUPcfl/zqG7EfsQdeUJtaWO98SGbuQ3pydJ3fHl2CvI/51OKYlCYYcaw==",
+      "requires": {
+        "@actions/http-client": "^1.0.11"
+      }
     },
     "@actions/exec": {
       "version": "1.0.4",
@@ -9576,9 +9582,9 @@
       }
     },
     "@actions/http-client": {
-      "version": "1.0.9",
-      "resolved": "https://registry.npmjs.org/@actions/http-client/-/http-client-1.0.9.tgz",
-      "integrity": "sha512-0O4SsJ7q+MK0ycvXPl2e6bMXV7dxAXOGjrXS1eTF9s2S401Tp6c/P3c3Joz04QefC1J6Gt942Wl2jbm3f4mLcg==",
+      "version": "1.0.11",
+      "resolved": "https://registry.npmjs.org/@actions/http-client/-/http-client-1.0.11.tgz",
+      "integrity": "sha512-VRYHGQV1rqnROJqdMvGUbY/Kn8vriQe/F9HR2AlYHzmKuM/p3kjNuXhmdBfcVgsvRWTz5C5XW5xvndZrVBuAYg==",
       "requires": {
         "tunnel": "0.0.6"
       }
diff --git a/package.json b/package.json
index 30702d0..dd934a8 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
   },
   "homepage": "https://github.com/peaceiris/actions-mdbook#readme",
   "dependencies": {
-    "@actions/core": "^1.2.7",
+    "@actions/core": "^1.6.0",
     "@actions/exec": "^1.0.4",
     "@actions/io": "^1.1.0",
     "@actions/tool-cache": "^1.6.1",