diff --git a/package-lock.json b/package-lock.json
index 53db26689..4a7f6e0d8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -24,13 +24,13 @@
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-            "decode-uri-component": "0.2.0",
-            "object-assign": "4.1.1",
-            "strict-uri-encode": "1.1.0"
+            "decode-uri-component": "^0.2.0",
+            "object-assign": "^4.1.0",
+            "strict-uri-encode": "^1.0.0"
           }
         }
       }
@@ -10899,7 +10901,7 @@
       "resolved": "https://registry.npmjs.org/xhr-request-promise/-/xhr-request-promise-0.1.2.tgz",
       "integrity": "sha1-NDxE0e53JrhkgGloLQ+EDIO0Jh0=",
       "requires": {
-        "xhr-request": "1.1.0"
+        "xhr-request": "^1.0.1"
       }
     },
     "xhr2-cookies": {
@@ -10907,7 +10909,7 @@
       "resolved": "https://registry.npmjs.org/xhr2-cookies/-/xhr2-cookies-1.1.0.tgz",
       "integrity": "sha1-fXdEnQmZGX8VXLc7I99yUF7YnUg=",
       "requires": {
-        "cookiejar": "2.1.2"
+        "cookiejar": "^2.1.1"
       }
     },
     "xregexp": {
@@ -10937,31 +10939,31 @@
     },
     "yargs": {
       "version": "4.8.1",
-      "resolved": "https://registry.npmjs.org/yargs/-/yargs-4.8.1.tgz",
+      "resolved": "http://registry.npmjs.org/yargs/-/yargs-4.8.1.tgz",
       "integrity": "sha1-wMQpJMpKqmsObaFznfshZDn53cA=",
       "requires": {
-        "cliui": "3.2.0",
-        "decamelize": "1.2.0",
-        "get-caller-file": "1.0.3",
-        "lodash.assign": "4.2.0",
-        "os-locale": "1.4.0",
-        "read-pkg-up": "1.0.1",
-        "require-directory": "2.1.1",
-        "require-main-filename": "1.0.1",
-        "set-blocking": "2.0.0",
-        "string-width": "1.0.2",
-        "which-module": "1.0.0",
-        "window-size": "0.2.0",
-        "y18n": "3.2.1",
-        "yargs-parser": "2.4.1"
+        "cliui": "^3.2.0",
+        "decamelize": "^1.1.1",
+        "get-caller-file": "^1.0.1",
+        "lodash.assign": "^4.0.3",
+        "os-locale": "^1.4.0",
+        "read-pkg-up": "^1.0.1",
+        "require-directory": "^2.1.1",
+        "require-main-filename": "^1.0.1",
+        "set-blocking": "^2.0.0",
+        "string-width": "^1.0.1",
+        "which-module": "^1.0.0",
+        "window-size": "^0.2.0",
+        "y18n": "^3.2.1",
+        "yargs-parser": "^2.4.1"
       },
       "dependencies": {
         "os-locale": {
           "version": "1.4.0",
-          "resolved": "https://registry.npmjs.org/os-locale/-/os-locale-1.4.0.tgz",
+          "resolved": "http://registry.npmjs.org/os-locale/-/os-locale-1.4.0.tgz",
           "integrity": "sha1-IPnxeuKe00XoveWDsT0gCYA8FNk=",
           "requires": {
-            "lcid": "1.0.0"
+            "lcid": "^1.0.0"
           }
         },
         "window-size": {
@@ -10981,8 +10983,8 @@
       "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-2.4.1.tgz",
       "integrity": "sha1-hVaN488VD/SfpRgl8DqMiA3cxcQ=",
       "requires": {
-        "camelcase": "3.0.0",
-        "lodash.assign": "4.2.0"
+        "camelcase": "^3.0.0",
+        "lodash.assign": "^4.0.6"
       }
     },
     "yauzl": {
@@ -10990,8 +10992,8 @@
       "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.10.0.tgz",
       "integrity": "sha1-x+sXyT4RLLEIb6bY5R+wZnt5pfk=",
       "requires": {
-        "buffer-crc32": "0.2.13",
-        "fd-slicer": "1.1.0"
+        "buffer-crc32": "~0.2.3",
+        "fd-slicer": "~1.1.0"
       }
     }
   }
diff --git a/package.json b/package.json
index e772d6e07..9e148fc65 100644
--- a/package.json
+++ b/package.json
@@ -80,7 +80,7 @@
     "serve-static": "^1.11.1",
     "shelljs": "^0.5.0",
     "simples": "^0.8.8",
-    "solc": "0.4.24",
+    "solc": "0.4.25",
     "string-replace-async": "^1.2.1",
     "style-loader": "^0.19.0",
     "swarm-api": "^0.1.2",
diff --git a/templates/boilerplate/embark.json b/templates/boilerplate/embark.json
index 837e2d2af..536ffe5d6 100644
--- a/templates/boilerplate/embark.json
+++ b/templates/boilerplate/embark.json
@@ -10,7 +10,7 @@
   "config": "config/",
   "versions": {
     "web3": "1.0.0-beta",
-    "solc": "0.4.24",
+    "solc": "0.4.25",
     "ipfs-api": "17.2.4"
   },
   "plugins": {
diff --git a/templates/demo/chains.json b/templates/demo/chains.json
index 0967ef424..0d16186b0 100644
--- a/templates/demo/chains.json
+++ b/templates/demo/chains.json
@@ -1 +1,22 @@
-{}
+{
+  "0x5542ca05857b3d110aacf28d0ef569fd1657e43677720cd192d852a7d04c0e0c": {
+    "contracts": {
+      "0xb84d125645e94e6329e6494db63830d1c68a719c328036dce55337f79a512e27": {
+        "name": "SimpleStorage",
+        "address": "0x37bc940c4097383e5A6a2041B76d80d855697872"
+      },
+      "0x3043b04ad856d169c8f0b0509c0bc63192dc7edd92d6933c58708298a0e381be": {
+        "name": "ENSRegistry",
+        "address": "0xf037E3D4ab24cF0DF024FaC027843367A44d42f6"
+      },
+      "0xc0164273c73e42bbbd2fbeb7717f837e0b5e9d433fbd0b05f93b9a2b0255fcef": {
+        "name": "Resolver",
+        "address": "0x61838aFa8Cfc7312A19a2233610Da0eb987236bf"
+      },
+      "0x3486140a570a091a8d73d9a85bfdaa4f6484f5f1d59897ee50968b6dee666487": {
+        "name": "FIFSRegistrar",
+        "address": "0xE242734a2295cC6549a6DAC3e6eaC8163B8b5208"
+      }
+    }
+  }
+}
diff --git a/templates/demo/contracts/simple_storage.sol b/templates/demo/contracts/simple_storage.sol
index f38decf87..d2ab00730 100644
--- a/templates/demo/contracts/simple_storage.sol
+++ b/templates/demo/contracts/simple_storage.sol
@@ -1,5 +1,4 @@
-pragma solidity ^0.4.23;
-
+pragma solidity ^0.4.25;
 
 contract SimpleStorage {
   uint public storedData;
diff --git a/templates/demo/embark.json b/templates/demo/embark.json
index 198029a6e..b6a611cdd 100644
--- a/templates/demo/embark.json
+++ b/templates/demo/embark.json
@@ -9,7 +9,7 @@
   "config": "config/",
   "versions": {
     "web3": "1.0.0-beta",
-    "solc": "0.4.24",
+    "solc": "0.4.25",
     "ipfs-api": "17.2.4"
   },
   "plugins": {
diff --git a/templates/demo/package-lock.json b/templates/demo/package-lock.json
new file mode 100644
index 000000000..2e546fc4e
--- /dev/null
+++ b/templates/demo/package-lock.json
@@ -0,0 +1,193 @@
+{
+  "name": "app_name",
+  "version": "0.0.1",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "babel-runtime": {
+      "version": "6.26.0",
+      "resolved": "https://registry.npmjs.org/babel-runtime/-/babel-runtime-6.26.0.tgz",
+      "integrity": "sha1-llxwWGaOgrVde/4E/yM3vItWR/4=",
+      "requires": {
+        "core-js": "^2.4.0",
+        "regenerator-runtime": "^0.11.0"
+      }
+    },
+    "classnames": {
+      "version": "2.2.6",
+      "resolved": "https://registry.npmjs.org/classnames/-/classnames-2.2.6.tgz",
+      "integrity": "sha512-JR/iSQOSt+LQIWwrwEzJ9uk0xfN3mTVYMwt1Ir5mUcSN6pU+V4zQFFaJsclJbPuAUQH+yfWef6tm7l1quW3C8Q=="
+    },
+    "core-js": {
+      "version": "2.5.7",
+      "resolved": "https://registry.npmjs.org/core-js/-/core-js-2.5.7.tgz",
+      "integrity": "sha512-RszJCAxg/PP6uzXVXL6BsxSXx/B05oJAQ2vkJRjyjrEcNVycaqOmNb5OTxZPE3xa5gwZduqza6L9JOCenh/Ecw=="
+    },
+    "dom-helpers": {
+      "version": "3.3.1",
+      "resolved": "https://registry.npmjs.org/dom-helpers/-/dom-helpers-3.3.1.tgz",
+      "integrity": "sha512-2Sm+JaYn74OiTM2wHvxJOo3roiq/h25Yi69Fqk269cNUwIXsCvATB6CRSFC9Am/20G2b28hGv/+7NiWydIrPvg=="
+    },
+    "invariant": {
+      "version": "2.2.4",
+      "resolved": "https://registry.npmjs.org/invariant/-/invariant-2.2.4.tgz",
+      "integrity": "sha512-phJfQVBuaJM5raOpJjSfkiD6BpbCE4Ns//LaXl6wGYtUBY83nWS6Rf9tXm2e8VaK60JEjYldbPif/A2B1C2gNA==",
+      "requires": {
+        "loose-envify": "^1.0.0"
+      }
+    },
+    "js-tokens": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-4.0.0.tgz",
+      "integrity": "sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ=="
+    },
+    "keycode": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/keycode/-/keycode-2.2.0.tgz",
+      "integrity": "sha1-PQr1bce4uOXLqNCpfxByBO7CKwQ="
+    },
+    "loose-envify": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/loose-envify/-/loose-envify-1.4.0.tgz",
+      "integrity": "sha512-lyuxPGr/Wfhrlem2CL/UcnUc1zcqKAImBDzukY7Y5F/yQiNdko6+fRLevlw1HgMySw7f611UIY408EtxRSoK3Q==",
+      "requires": {
+        "js-tokens": "^3.0.0 || ^4.0.0"
+      }
+    },
+    "object-assign": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
+      "integrity": "sha1-IQmtx5ZYh8/AXLvUQsrIv7s2CGM="
+    },
+    "prop-types": {
+      "version": "15.6.2",
+      "resolved": "https://registry.npmjs.org/prop-types/-/prop-types-15.6.2.tgz",
+      "integrity": "sha512-3pboPvLiWD7dkI3qf3KbUe6hKFKa52w+AE0VCqECtf+QHAKgOL37tTaNCnuX1nAAQ4ZhyP+kYVKf8rLmJ/feDQ==",
+      "requires": {
+        "loose-envify": "^1.3.1",
+        "object-assign": "^4.1.1"
+      }
+    },
+    "prop-types-extra": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/prop-types-extra/-/prop-types-extra-1.1.0.tgz",
+      "integrity": "sha512-QFyuDxvMipmIVKD2TwxLVPzMnO4e5oOf1vr3tJIomL8E7d0lr6phTHd5nkPhFIzTD1idBLLEPeylL9g+rrTzRg==",
+      "requires": {
+        "react-is": "^16.3.2",
+        "warning": "^3.0.0"
+      }
+    },
+    "react": {
+      "version": "16.5.1",
+      "resolved": "https://registry.npmjs.org/react/-/react-16.5.1.tgz",
+      "integrity": "sha512-E+23+rbpPsJgSX812LQkwupUCFnbVE84+L8uxlkqN5MU0DcraWMlVf9cRvKCKtGu0XvScyRnW7Z+9d7ymkjy3A==",
+      "requires": {
+        "loose-envify": "^1.1.0",
+        "object-assign": "^4.1.1",
+        "prop-types": "^15.6.2",
+        "schedule": "^0.4.0"
+      }
+    },
+    "react-bootstrap": {
+      "version": "0.32.1",
+      "resolved": "https://registry.npmjs.org/react-bootstrap/-/react-bootstrap-0.32.1.tgz",
+      "integrity": "sha512-RbfzKUbsukWsToWqGHfCCyMFq9QQI0TznutdyxyJw6dih2NvIne25Mrssg8LZsprqtPpyQi8bN0L0Fx3fUsL8Q==",
+      "requires": {
+        "babel-runtime": "^6.11.6",
+        "classnames": "^2.2.5",
+        "dom-helpers": "^3.2.0",
+        "invariant": "^2.2.1",
+        "keycode": "^2.1.2",
+        "prop-types": "^15.5.10",
+        "prop-types-extra": "^1.0.1",
+        "react-overlays": "^0.8.0",
+        "react-prop-types": "^0.4.0",
+        "react-transition-group": "^2.0.0",
+        "uncontrollable": "^4.1.0",
+        "warning": "^3.0.0"
+      }
+    },
+    "react-dom": {
+      "version": "16.5.1",
+      "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-16.5.1.tgz",
+      "integrity": "sha512-l4L9GtX7ezgnDIIr6AaNvGBM4BiK0fSs4/V8bdsu9X6xqrtHr+jp6auT0hbHpN7bH9WRvDBZceWQ9WJ3lGCIvQ==",
+      "requires": {
+        "loose-envify": "^1.1.0",
+        "object-assign": "^4.1.1",
+        "prop-types": "^15.6.2",
+        "schedule": "^0.4.0"
+      }
+    },
+    "react-is": {
+      "version": "16.5.1",
+      "resolved": "https://registry.npmjs.org/react-is/-/react-is-16.5.1.tgz",
+      "integrity": "sha512-Q7S+9y2lJA9oJCMqLt045f+kLRhsMLA1wW2DAGXA6b7wcTQRHnUDMc5oR49tn0Z4swvnfV+/t8iZFXY74IQmpA=="
+    },
+    "react-lifecycles-compat": {
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/react-lifecycles-compat/-/react-lifecycles-compat-3.0.4.tgz",
+      "integrity": "sha512-fBASbA6LnOU9dOU2eW7aQ8xmYBSXUIWr+UmF9b1efZBazGNO+rcXT/icdKnYm2pTwcRylVUYwW7H1PHfLekVzA=="
+    },
+    "react-overlays": {
+      "version": "0.8.3",
+      "resolved": "https://registry.npmjs.org/react-overlays/-/react-overlays-0.8.3.tgz",
+      "integrity": "sha512-h6GT3jgy90PgctleP39Yu3eK1v9vaJAW73GOA/UbN9dJ7aAN4BTZD6793eI1D5U+ukMk17qiqN/wl3diK1Z5LA==",
+      "requires": {
+        "classnames": "^2.2.5",
+        "dom-helpers": "^3.2.1",
+        "prop-types": "^15.5.10",
+        "prop-types-extra": "^1.0.1",
+        "react-transition-group": "^2.2.0",
+        "warning": "^3.0.0"
+      }
+    },
+    "react-prop-types": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/react-prop-types/-/react-prop-types-0.4.0.tgz",
+      "integrity": "sha1-+ZsL+0AGkpya8gUefBQUpcdbk9A=",
+      "requires": {
+        "warning": "^3.0.0"
+      }
+    },
+    "react-transition-group": {
+      "version": "2.4.0",
+      "resolved": "https://registry.npmjs.org/react-transition-group/-/react-transition-group-2.4.0.tgz",
+      "integrity": "sha512-Xv5d55NkJUxUzLCImGSanK8Cl/30sgpOEMGc5m86t8+kZwrPxPCPcFqyx83kkr+5Lz5gs6djuvE5By+gce+VjA==",
+      "requires": {
+        "dom-helpers": "^3.3.1",
+        "loose-envify": "^1.3.1",
+        "prop-types": "^15.6.2",
+        "react-lifecycles-compat": "^3.0.4"
+      }
+    },
+    "regenerator-runtime": {
+      "version": "0.11.1",
+      "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.11.1.tgz",
+      "integrity": "sha512-MguG95oij0fC3QV3URf4V2SDYGJhJnJGqvIIgdECeODCT98wSWDAJ94SSuVpYQUoTcGUIL6L4yNB7j1DFFHSBg=="
+    },
+    "schedule": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/schedule/-/schedule-0.4.0.tgz",
+      "integrity": "sha512-hYjmoaEMojiMkWCxKr6ue+LYcZ29u29+AamWYmzwT2VOO9ws5UJp/wNhsVUPiUeNh+EdRfZm7nDeB40ffTfMhA==",
+      "requires": {
+        "object-assign": "^4.1.1"
+      }
+    },
+    "uncontrollable": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/uncontrollable/-/uncontrollable-4.1.0.tgz",
+      "integrity": "sha1-4DWCkSUuGGUiLZCTmxny9J+Bwak=",
+      "requires": {
+        "invariant": "^2.1.0"
+      }
+    },
+    "warning": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/warning/-/warning-3.0.0.tgz",
+      "integrity": "sha1-MuU3fLVy3kqwR1O9+IIcAe1gW3w=",
+      "requires": {
+        "loose-envify": "^1.0.0"
+      }
+    }
+  }
+}
diff --git a/templates/simple/embark.json b/templates/simple/embark.json
index 57fc6fff8..a75a8f199 100644
--- a/templates/simple/embark.json
+++ b/templates/simple/embark.json
@@ -10,7 +10,7 @@
     "webserver": false
   },
   "versions": {
-    "solc": "0.4.24"
+    "solc": "0.4.25"
   },
   "plugins": {
   },