diff --git a/.travis.yml b/.travis.yml
index a4248ca..1691060 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,6 +11,8 @@ script:
   - npm test
   - npm install --no-save typescript@2.4
   - npm test
+  - npm install --no-save typescript
+  - npm test
 cache:
   directories:
     - node_modules
diff --git a/README.md b/README.md
index 1abc0fc..91e16ac 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ espower-typescript
 
 ## TypeScript versions
 
-* espower-typescript v8.x uses TypeScript v2.2, v2.3 and v2.4
+* espower-typescript v8.x uses TypeScript from v2.2 to v2.5
 * espower-typescript v7.x uses TypeScript v2.1
 * espower-typescript v6.x uses TypeScript v2.0
 * espower-typescript v5.x uses TypeScript v1.8
diff --git a/package-lock.json b/package-lock.json
index 5ef2f68..e8cce3e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "espower-typescript",
-  "version": "8.1.0",
+  "version": "8.1.1-rc.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -19,17 +19,14 @@
       "resolved": "https://registry.npmjs.org/amdefine/-/amdefine-1.0.1.tgz",
       "integrity": "sha1-SlKCrBZHKek2Gbz9OtFR+BfOkfU="
     },
-    "ansi-regex": {
-      "version": "2.1.1",
-      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
-      "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
-      "dev": true
-    },
     "ansi-styles": {
-      "version": "2.2.1",
-      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-2.2.1.tgz",
-      "integrity": "sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4=",
-      "dev": true
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.0.tgz",
+      "integrity": "sha512-NnSOmMEYtVR2JVMIGTzynRkkaxtiq1xnFBcdQD/DnNCYPoEPsVJhM98BDyaoNOQIi7p4okdi3E27eN7GQbsUug==",
+      "dev": true,
+      "requires": {
+        "color-convert": "1.9.0"
+      }
     },
     "array-filter": {
       "version": "1.0.0",
@@ -104,26 +101,48 @@
       "dev": true
     },
     "chalk": {
-      "version": "1.1.3",
-      "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
-      "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.1.0.tgz",
+      "integrity": "sha512-LUHGS/dge4ujbXMJrnihYMcL4AoOweGnw9Tp3kQuqy1Kx5c1qKjqvMJZ6nVJPMWJtKCTN72ZogH3oeSO9g9rXQ==",
       "dev": true,
       "requires": {
-        "ansi-styles": "2.2.1",
+        "ansi-styles": "3.2.0",
         "escape-string-regexp": "1.0.5",
-        "has-ansi": "2.0.0",
-        "strip-ansi": "3.0.1",
-        "supports-color": "2.0.0"
+        "supports-color": "4.4.0"
       },
       "dependencies": {
-        "supports-color": {
+        "has-flag": {
           "version": "2.0.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
-          "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
+          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-2.0.0.tgz",
+          "integrity": "sha1-6CB68cx7MNRGzHC3NLXovhj4jVE=",
           "dev": true
+        },
+        "supports-color": {
+          "version": "4.4.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-4.4.0.tgz",
+          "integrity": "sha512-rKC3+DyXWgK0ZLKwmRsrkyHVZAjNkfzeehuFWdGGcqGDTZFH73+RH6S/RDAAxl9GusSjZSUWYLmT9N5pzXFOXQ==",
+          "dev": true,
+          "requires": {
+            "has-flag": "2.0.0"
+          }
         }
       }
     },
+    "color-convert": {
+      "version": "1.9.0",
+      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.0.tgz",
+      "integrity": "sha1-Gsz5fdc5uYO/mU1W/sj5WFNkG3o=",
+      "dev": true,
+      "requires": {
+        "color-name": "1.1.3"
+      }
+    },
+    "color-name": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.3.tgz",
+      "integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU=",
+      "dev": true
+    },
     "commander": {
       "version": "2.9.0",
       "resolved": "https://registry.npmjs.org/commander/-/commander-2.9.0.tgz",
@@ -148,6 +167,12 @@
       "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.4.1.tgz",
       "integrity": "sha1-TekR5mew6ukSTjQlS1OupvxhjT4="
     },
+    "core-util-is": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
+      "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac=",
+      "dev": true
+    },
     "create-react-class": {
       "version": "15.6.0",
       "resolved": "https://registry.npmjs.org/create-react-class/-/create-react-class-15.6.0.tgz",
@@ -179,12 +204,12 @@
       }
     },
     "debug": {
-      "version": "2.6.0",
-      "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.0.tgz",
-      "integrity": "sha1-vFlryr52F/Edn6FTYe3tVgi4SZs=",
+      "version": "2.6.8",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.8.tgz",
+      "integrity": "sha1-5zFTHKLt4n0YgiJCfaF4IdaP9Pw=",
       "dev": true,
       "requires": {
-        "ms": "0.7.2"
+        "ms": "2.0.0"
       }
     },
     "deep-equal": {
@@ -278,13 +303,13 @@
       }
     },
     "es-abstract": {
-      "version": "1.8.0",
-      "resolved": "https://registry.npmjs.org/es-abstract/-/es-abstract-1.8.0.tgz",
-      "integrity": "sha512-Cf9/h5MrXtExM20gSS55YFrGKCyPrRBjIVBtVyy8vmlsDfe0NPKMWj65tPLgzyfPuapWxh5whpXCtW4+AW5mRg==",
+      "version": "1.8.1",
+      "resolved": "https://registry.npmjs.org/es-abstract/-/es-abstract-1.8.1.tgz",
+      "integrity": "sha512-G6pkMLdmxF3dh4hbuYuQiku29rRqo9p5+iRf7mZTEELT/xZ/D9Vzg04ddlvzJuJuCmZp1WBbfbVLZEeygYNkpw==",
       "dev": true,
       "requires": {
         "es-to-primitive": "1.1.1",
-        "function-bind": "1.1.0",
+        "function-bind": "1.1.1",
         "has": "1.0.1",
         "is-callable": "1.1.3",
         "is-regex": "1.0.4"
@@ -586,9 +611,9 @@
       "dev": true
     },
     "function-bind": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.0.tgz",
-      "integrity": "sha1-FhdnFMgBeY5Ojyz391KUZ7tKV3E=",
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.1.tgz",
+      "integrity": "sha512-yIovAzMX49sF8Yl58fSCWJ5svSLuaibPxXQJFLmBObTuCr0Mf1KiPopGM9NiFjiYBCbfaa2Fh6breQ6ANVTI0A==",
       "dev": true
     },
     "glob": {
@@ -629,16 +654,7 @@
       "integrity": "sha1-hGFzP1OLCDfJNh45qauelwTcLyg=",
       "dev": true,
       "requires": {
-        "function-bind": "1.1.0"
-      }
-    },
-    "has-ansi": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/has-ansi/-/has-ansi-2.0.0.tgz",
-      "integrity": "sha1-NPUEnOHs3ysGSa8+8k5F7TVBbZE=",
-      "dev": true,
-      "requires": {
-        "ansi-regex": "2.1.1"
+        "function-bind": "1.1.1"
       }
     },
     "has-flag": {
@@ -734,6 +750,12 @@
       "resolved": "https://registry.npmjs.org/is-url/-/is-url-1.2.2.tgz",
       "integrity": "sha1-SYkFpZO/R8wtnn9zg3K792lsfyY="
     },
+    "isarray": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/isarray/-/isarray-0.0.1.tgz",
+      "integrity": "sha1-ihis/Kmo9Bd+Cav8YDiTmwXR7t8=",
+      "dev": true
+    },
     "isexe": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/isexe/-/isexe-2.0.0.tgz",
@@ -882,6 +904,15 @@
       "integrity": "sha1-5WqpTEyAVaFkBKBnS3jyFffI4ZQ=",
       "dev": true
     },
+    "memory-streams": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/memory-streams/-/memory-streams-0.1.2.tgz",
+      "integrity": "sha1-Jz/3d6tg/sWZsRY1UlUoLMosUMI=",
+      "dev": true,
+      "requires": {
+        "readable-stream": "1.0.34"
+      }
+    },
     "merge-estraverse-visitors": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/merge-estraverse-visitors/-/merge-estraverse-visitors-1.0.0.tgz",
@@ -914,14 +945,14 @@
       }
     },
     "mocha": {
-      "version": "3.4.2",
-      "resolved": "https://registry.npmjs.org/mocha/-/mocha-3.4.2.tgz",
-      "integrity": "sha1-0O9NMyEm2/GNDWQMmzgt1IvpdZQ=",
+      "version": "3.5.0",
+      "resolved": "https://registry.npmjs.org/mocha/-/mocha-3.5.0.tgz",
+      "integrity": "sha512-pIU2PJjrPYvYRqVpjXzj76qltO9uBYI7woYAMoxbSefsa+vqAfptjoeevd6bUgwD0mPIO+hv9f7ltvsNreL2PA==",
       "dev": true,
       "requires": {
         "browser-stdout": "1.3.0",
         "commander": "2.9.0",
-        "debug": "2.6.0",
+        "debug": "2.6.8",
         "diff": "3.2.0",
         "escape-string-regexp": "1.0.5",
         "glob": "7.1.1",
@@ -933,9 +964,9 @@
       }
     },
     "ms": {
-      "version": "0.7.2",
-      "resolved": "https://registry.npmjs.org/ms/-/ms-0.7.2.tgz",
-      "integrity": "sha1-riXPJRKziFodldfwN4aNhDESR2U=",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
+      "integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g=",
       "dev": true
     },
     "multi-stage-sourcemap": {
@@ -979,13 +1010,15 @@
       }
     },
     "npm-run-all": {
-      "version": "4.0.2",
-      "resolved": "https://registry.npmjs.org/npm-run-all/-/npm-run-all-4.0.2.tgz",
-      "integrity": "sha1-qEZpNI5ttsy+BSIAtM22v+A0pP4=",
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/npm-run-all/-/npm-run-all-4.1.1.tgz",
+      "integrity": "sha512-qrmqqaJa+REbzUTIL/mHfTdgwz+gL1xUezY/ueyLa7GISZ4T3h0CH8D2r6AaZdCYN2unu7PzspP0ofpXla1ftg==",
       "dev": true,
       "requires": {
-        "chalk": "1.1.3",
+        "ansi-styles": "3.2.0",
+        "chalk": "2.1.0",
         "cross-spawn": "5.1.0",
+        "memory-streams": "0.1.2",
         "minimatch": "3.0.4",
         "ps-tree": "1.1.0",
         "read-pkg": "2.0.0",
@@ -1255,6 +1288,18 @@
         "path-type": "2.0.0"
       }
     },
+    "readable-stream": {
+      "version": "1.0.34",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-1.0.34.tgz",
+      "integrity": "sha1-Elgg40vIQtLyqq+v5MKRbuMsFXw=",
+      "dev": true,
+      "requires": {
+        "core-util-is": "1.0.2",
+        "inherits": "2.0.3",
+        "isarray": "0.0.1",
+        "string_decoder": "0.10.31"
+      }
+    },
     "semver": {
       "version": "5.4.1",
       "resolved": "https://registry.npmjs.org/semver/-/semver-5.4.1.tgz",
@@ -1350,6 +1395,12 @@
         "duplexer": "0.1.1"
       }
     },
+    "string_decoder": {
+      "version": "0.10.31",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz",
+      "integrity": "sha1-YuIDvEF2bGwoyfyEMB2rHFMQ+pQ=",
+      "dev": true
+    },
     "string.prototype.padend": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/string.prototype.padend/-/string.prototype.padend-3.0.0.tgz",
@@ -1357,8 +1408,8 @@
       "dev": true,
       "requires": {
         "define-properties": "1.1.2",
-        "es-abstract": "1.8.0",
-        "function-bind": "1.1.0"
+        "es-abstract": "1.8.1",
+        "function-bind": "1.1.1"
       }
     },
     "stringifier": {
@@ -1372,15 +1423,6 @@
         "type-name": "2.0.2"
       }
     },
-    "strip-ansi": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
-      "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
-      "dev": true,
-      "requires": {
-        "ansi-regex": "2.1.1"
-      }
-    },
     "strip-bom": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-3.0.0.tgz",
@@ -1422,16 +1464,16 @@
       "integrity": "sha1-7+fUEj2KxSr/9/QMfk3sUmYAj7Q="
     },
     "typescript": {
-      "version": "2.4.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-2.4.2.tgz",
-      "integrity": "sha1-+DlfhdRZJ2BnyYiqQYN6j4KHCEQ="
+      "version": "2.5.2",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-2.5.2.tgz",
+      "integrity": "sha1-A4qV99m7tCCxvzW6MdTFwd0//jQ="
     },
     "typescript-simple": {
-      "version": "8.0.3",
-      "resolved": "https://registry.npmjs.org/typescript-simple/-/typescript-simple-8.0.3.tgz",
-      "integrity": "sha512-rvmB8QIS5RwypAKT/kN7z2/90zN7iH8Q3EKcWtfDIIArYUut0KKmFyZn1gnWhcjL1jdF/ZDJVNPAVxmE9yPzGw==",
+      "version": "8.0.4",
+      "resolved": "https://registry.npmjs.org/typescript-simple/-/typescript-simple-8.0.4.tgz",
+      "integrity": "sha512-N7xkncA/uXsveI05iAdeU8IcqQ188n+g4BlVab9gfaqdaVP3M3+QEXkOe8rCHaDYvGZ27UnMLcILMpB5ubBUWg==",
       "requires": {
-        "typescript": "2.4.2"
+        "typescript": "2.5.2"
       }
     },
     "ua-parser-js": {
diff --git a/package.json b/package.json
index 4f3af9e..4f8851d 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "espower-typescript",
   "description": "power-assert instrumentor for TypeScript",
-  "version": "8.1.0",
+  "version": "8.1.1-rc.0",
   "author": "Teppei Sato <teppeis@gmail.com>",
   "engines": {
     "node": ">=4"
@@ -20,13 +20,13 @@
   "dependencies": {
     "espower-source": "^2.0.0",
     "minimatch": "^3.0.3",
-    "typescript": "^2.4.2",
-    "typescript-simple": "^8.0.3"
+    "typescript": "^2.5.2",
+    "typescript-simple": "^8.0.4"
   },
   "devDependencies": {
     "expect.js": "^0.3.1",
-    "mocha": "^3.1.2",
-    "npm-run-all": "^4.0.2",
+    "mocha": "^3.5.0",
+    "npm-run-all": "^4.1.1",
     "power-assert": "^1.2.0",
     "react": "^15.6.1"
   },