diff --git a/blog-koa2/package-lock.json b/blog-koa2/package-lock.json
index 81bbec6..8173314 100644
--- a/blog-koa2/package-lock.json
+++ b/blog-koa2/package-lock.json
@@ -842,11 +842,6 @@
         "is-obj": "^1.0.0"
       }
     },
-    "double-ended-queue": {
-      "version": "2.1.0-0",
-      "resolved": "https://registry.npmjs.org/double-ended-queue/-/double-ended-queue-2.1.0-0.tgz",
-      "integrity": "sha1-ED01J/0xUo9AGIEwyEHv3XgmTlw="
-    },
     "duplexer3": {
       "version": "0.1.4",
       "resolved": "https://registry.npmjs.org/duplexer3/-/duplexer3-0.1.4.tgz",
@@ -1077,7 +1072,8 @@
         "ansi-regex": {
           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -1098,12 +1094,14 @@
         "balanced-match": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
@@ -1118,17 +1116,20 @@
         "code-point-at": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -1245,7 +1246,8 @@
         "inherits": {
           "version": "2.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.5",
@@ -1257,6 +1259,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -1271,6 +1274,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
@@ -1278,12 +1282,14 @@
         "minimist": {
           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "minipass": {
           "version": "2.3.5",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "^5.1.2",
             "yallist": "^3.0.0"
@@ -1302,6 +1308,7 @@
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -1382,7 +1389,8 @@
         "number-is-nan": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "object-assign": {
           "version": "4.1.1",
@@ -1394,6 +1402,7 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -1479,7 +1488,8 @@
         "safe-buffer": {
           "version": "5.1.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -1515,6 +1525,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
@@ -1534,6 +1545,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -1577,12 +1589,14 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },
@@ -3086,19 +3100,25 @@
       }
     },
     "redis": {
-      "version": "2.8.0",
-      "resolved": "https://registry.npmjs.org/redis/-/redis-2.8.0.tgz",
-      "integrity": "sha512-M1OkonEQwtRmZv4tEWF2VgpG0JWJ8Fv1PhlgT5+B+uNq2cA3Rt1Yt/ryoR+vQNOQcIEgdCdfH0jr3bDpihAw1A==",
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/redis/-/redis-3.1.1.tgz",
+      "integrity": "sha512-QhkKhOuzhogR1NDJfBD34TQJz2ZJwDhhIC6ZmvpftlmfYShHHQXjjNspAJ+Z2HH5NwSBVYBVganbiZ8bgFMHjg==",
       "requires": {
-        "double-ended-queue": "^2.1.0-0",
-        "redis-commands": "^1.2.0",
-        "redis-parser": "^2.6.0"
+        "denque": "^1.5.0",
+        "redis-commands": "^1.7.0",
+        "redis-errors": "^1.2.0",
+        "redis-parser": "^3.0.0"
       },
       "dependencies": {
-        "redis-parser": {
-          "version": "2.6.0",
-          "resolved": "https://registry.npmjs.org/redis-parser/-/redis-parser-2.6.0.tgz",
-          "integrity": "sha1-Uu0J2srBCPGmMcB+m2mUHnoZUEs="
+        "denque": {
+          "version": "1.5.0",
+          "resolved": "https://registry.npmjs.org/denque/-/denque-1.5.0.tgz",
+          "integrity": "sha512-CYiCSgIF1p6EUByQPlGkKnP1M9g0ZV3qMIrqMqZqdwazygIA/YP2vrbcyl1h/WppKJTdl1F85cXIle+394iDAQ=="
+        },
+        "redis-commands": {
+          "version": "1.7.0",
+          "resolved": "https://registry.npmjs.org/redis-commands/-/redis-commands-1.7.0.tgz",
+          "integrity": "sha512-nJWqw3bTFy21hX/CPKHth6sfhZbdiHP6bTawSgQBlKOVRG7EZkfHbbHwQJnrE4vsQf0CMNE+3gJ4Fmm16vdVlQ=="
         }
       }
     },
diff --git a/blog-koa2/package.json b/blog-koa2/package.json
index 0ee94e8..b442d73 100644
--- a/blog-koa2/package.json
+++ b/blog-koa2/package.json
@@ -23,7 +23,7 @@
     "koa-views": "^6.2.0",
     "mysql": "^2.17.1",
     "pug": "^2.0.3",
-    "redis": "^2.8.0",
+    "redis": "^3.1.1",
     "xss": "^1.0.6"
   },
   "devDependencies": {