diff --git a/package-lock.json b/package-lock.json
index 85aefc7..490c952 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "bitsim",
-  "version": "0.0.8",
+  "version": "0.0.15",
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   "requires": true,
   "dependencies": {
@@ -38,11 +38,11 @@
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-      "resolved": "https://registry.npmjs.org/axios/-/axios-0.19.2.tgz",
-      "integrity": "sha512-fjgm5MvRHLhx+osE2xoekY70AhARk3a6hkN+3Io1jc00jtquGvxYlKlsFUhmUET0V5te6CcZI7lcv2Ym61mjHA==",
+      "version": "0.21.1",
+      "resolved": "https://registry.npmjs.org/axios/-/axios-0.21.1.tgz",
+      "integrity": "sha512-dKQiRHxGD9PPRIUNIWvZhPTPpl1rf/OxTYKsqKUDjBwYylTvV7SjSHJb9ratfyzM6wCdLCOYLzs73qpg5c4iGA==",
       "requires": {
-        "follow-redirects": "1.5.10"
+        "follow-redirects": "^1.10.0"
       }
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@@ -54,9 +54,9 @@
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-      "version": "1.3.1",
-      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.3.1.tgz",
-      "integrity": "sha512-mLQ4i2QO1ytvGWFWmcngKO//JXAQueZvwEKtjgQFM4jIK0kU+ytMfplL8j+n5mspOfjHwoAg+9yhb7BwAHm36g=="
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz",
+      "integrity": "sha512-AKpaYlHn8t4SVbOHCy+b5+KKgvR4vrsD8vbvrbiQJps7fKDTkjkDry6ji0rUJjC0kzbNePLwzxq8iypo41qeWA=="
     },
     "better-sqlite3": {
       "version": "6.0.1",
@@ -78,9 +78,9 @@
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-      "version": "4.0.2",
-      "resolved": "https://registry.npmjs.org/bl/-/bl-4.0.2.tgz",
-      "integrity": "sha512-j4OH8f6Qg2bGuWfRiltT2HYGx0e1QcBTrK9KAHNMwMZdQnDZFk0ZSYIpADjYCB3U12nicC5tVJwSIhwOWjb4RQ==",
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/bl/-/bl-4.0.3.tgz",
+      "integrity": "sha512-fs4G6/Hu4/EE+F75J8DuN/0IpQqNjAdC7aEQv7Qt8MHGUH7Ckv2MwTEEeN9QehD0pfIDkMI1bkHYkKy7xHyKIg==",
       "requires": {
         "buffer": "^5.5.0",
         "inherits": "^2.0.4",
@@ -138,12 +138,12 @@
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-      "version": "5.6.0",
-      "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.6.0.tgz",
-      "integrity": "sha512-/gDYp/UtU0eA1ys8bOs9J6a+E/KWIY+DZ+Q2WESNUA0jFRsJOc0SNUO6xJ5SGA1xueg3NL65W6s+NY5l9cunuw==",
+      "version": "5.7.1",
+      "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.7.1.tgz",
+      "integrity": "sha512-EHcyIPBQ4BSGlvjB16k5KgAJ27CIsHY/2JBmCRReo48y9rQ3MaUzWX3KVlBa4U7MyX02HdVj0K7C3WaB3ju7FQ==",
       "requires": {
-        "base64-js": "^1.0.2",
-        "ieee754": "^1.1.4"
+        "base64-js": "^1.3.1",
+        "ieee754": "^1.1.13"
       }
     },
     "chownr": {
@@ -240,12 +240,9 @@
       "integrity": "sha512-0Zt+s3L7Vf1biwWZ29aARiVYLx7iMGnEUl9x33fbB/j3jR81u/O2LbqK+Bm1CDSNDKVtJ/YjwY7TUd5SkeLQLw=="
     },
     "follow-redirects": {
-      "version": "1.5.10",
-      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.5.10.tgz",
-      "integrity": "sha512-0V5l4Cizzvqt5D44aTXbFZz+FtyXV1vrDN6qrelxtfYQKW0KO0W2T/hkE8xvGa/540LkZlkaUjO4ailYTFtHVQ==",
-      "requires": {
-        "debug": "=3.1.0"
-      }
+      "version": "1.13.1",
+      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.13.1.tgz",
+      "integrity": "sha512-SSG5xmZh1mkPGyKzjZP8zLjltIfpW32Y5QpdNJyjcfGxK3qo3NDDkZOZSFiGn1A6SclQxY9GzEwAHQ3dmYRWpg=="
     },
     "fs-constants": {
       "version": "1.0.0",
@@ -305,9 +302,9 @@
       }
     },
     "ieee754": {
-      "version": "1.1.13",
-      "resolved": "https://registry.npmjs.org/ieee754/-/ieee754-1.1.13.tgz",
-      "integrity": "sha512-4vf7I2LYV/HaWerSo3XmlMkp5eZ83i+/CDluXi/IGTs/O1sejBNhTtnxzmRZfvOUqj7lZjqHkeTvpgSFDlWZTg=="
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/ieee754/-/ieee754-1.2.1.tgz",
+      "integrity": "sha512-dcyqhDvX1C46lXZcVqCpK+FtMRQVdIMN6/Df5js2zouUsqG7I6sFxitIC+7KYK29KdXOLHdu9zL4sFnoVQnqaA=="
     },
     "inherits": {
       "version": "2.0.3",
@@ -315,9 +312,9 @@
       "integrity": "sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4="
     },
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-      "version": "1.3.5",
-      "resolved": "https://registry.npmjs.org/ini/-/ini-1.3.5.tgz",
-      "integrity": "sha512-RZY5huIKCMRWDUqZlEi72f/lmXKMvuszcMBduliQ3nnWbx9X/ZBQO7DijMEYS9EhHBb2qacRUMtC7svLwe0lcw=="
+      "version": "1.3.8",
+      "resolved": "https://registry.npmjs.org/ini/-/ini-1.3.8.tgz",
+      "integrity": "sha512-JV/yugV2uzW5iMRSiZAyDtQd+nxtUnjeLt0acNdw98kKLrvuRVyB80tsREOE7yvGVgalhZ6RNXCmEHkUKBKxew=="
     },
     "integer": {
       "version": "3.0.1",
@@ -425,9 +422,9 @@
       "integrity": "sha512-ONmRUqK7zj7DWX0D9ADe03wbwOBZxNAfF20PlGfCWQcD3+/MakShIHrMqx9YwPTfxDdF1zLeL+RGZiR9kGMLdg=="
     },
     "node-abi": {
-      "version": "2.18.0",
-      "resolved": "https://registry.npmjs.org/node-abi/-/node-abi-2.18.0.tgz",
-      "integrity": "sha512-yi05ZoiuNNEbyT/xXfSySZE+yVnQW6fxPZuFbLyS1s6b5Kw3HzV2PHOM4XR+nsjzkHxByK+2Wg+yCQbe35l8dw==",
+      "version": "2.19.3",
+      "resolved": "https://registry.npmjs.org/node-abi/-/node-abi-2.19.3.tgz",
+      "integrity": "sha512-9xZrlyfvKhWme2EXFKQhZRp1yNWT/uI1luYPr3sFl+H4keYY4xR+1jO7mvTTijIsHf1M+QDe9uWuKeEpLInIlg==",
       "requires": {
         "semver": "^5.4.1"
       }
@@ -467,15 +464,15 @@
       }
     },
     "prebuild-install": {
-      "version": "5.3.4",
-      "resolved": "https://registry.npmjs.org/prebuild-install/-/prebuild-install-5.3.4.tgz",
-      "integrity": "sha512-AkKN+pf4fSEihjapLEEj8n85YIw/tN6BQqkhzbDc0RvEZGdkpJBGMUYx66AAMcPG2KzmPQS7Cm16an4HVBRRMA==",
+      "version": "5.3.6",
+      "resolved": "https://registry.npmjs.org/prebuild-install/-/prebuild-install-5.3.6.tgz",
+      "integrity": "sha512-s8Aai8++QQGi4sSbs/M1Qku62PFK49Jm1CbgXklGz4nmHveDq0wzJkg7Na5QbnO1uNH8K7iqx2EQ/mV0MZEmOg==",
       "requires": {
         "detect-libc": "^1.0.3",
         "expand-template": "^2.0.3",
         "github-from-package": "0.0.0",
         "minimist": "^1.2.3",
-        "mkdirp": "^0.5.1",
+        "mkdirp-classic": "^0.5.3",
         "napi-build-utils": "^1.0.1",
         "node-abi": "^2.7.0",
         "noop-logger": "^0.1.1",
@@ -563,9 +560,9 @@
       "integrity": "sha512-VUJ49FC8U1OxwZLxIbTTrDvLnf/6TDgxZcK8wxR8zs13xpx7xbG60ndBlhNrFi2EMuFRoeDoJO7wthSLq42EjA=="
     },
     "simple-concat": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/simple-concat/-/simple-concat-1.0.0.tgz",
-      "integrity": "sha1-c0TLuLbib7J9ZrL8hvn21Zl1IcY="
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/simple-concat/-/simple-concat-1.0.1.tgz",
+      "integrity": "sha512-cSFtAPtRhljv69IK0hTVZQ+OfE9nePi/rtJmw5UjHeVyVroEqJXP1sFztKUy1qU+xvz3u/sfYJLa947b7nAN2Q=="
     },
     "simple-get": {
       "version": "3.1.0",
@@ -630,22 +627,22 @@
       }
     },
     "tar-fs": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npmjs.org/tar-fs/-/tar-fs-2.1.0.tgz",
-      "integrity": "sha512-9uW5iDvrIMCVpvasdFHW0wJPez0K4JnMZtsuIeDI7HyMGJNxmDZDOCQROr7lXyS+iL/QMpj07qcjGYTSdRFXUg==",
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/tar-fs/-/tar-fs-2.1.1.tgz",
+      "integrity": "sha512-V0r2Y9scmbDRLCNex/+hYzvp/zyYjvFbHPNgVTKfQvVrb6guiE/fxP+XblDNR011utopbkex2nM4dHNV6GDsng==",
       "requires": {
         "chownr": "^1.1.1",
         "mkdirp-classic": "^0.5.2",
         "pump": "^3.0.0",
-        "tar-stream": "^2.0.0"
+        "tar-stream": "^2.1.4"
       }
     },
     "tar-stream": {
-      "version": "2.1.2",
-      "resolved": "https://registry.npmjs.org/tar-stream/-/tar-stream-2.1.2.tgz",
-      "integrity": "sha512-UaF6FoJ32WqALZGOIAApXx+OdxhekNMChu6axLJR85zMMjXKWFGjbIRe+J6P4UnRGg9rAwWvbTT0oI7hD/Un7Q==",
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/tar-stream/-/tar-stream-2.2.0.tgz",
+      "integrity": "sha512-ujeqbceABgwMZxEJnk2HDY2DlnUZ+9oEcb1KzTVfYHio0UE6dG71n60d8D2I4qNvleWrrXpmjpt7vZeF1LnMZQ==",
       "requires": {
-        "bl": "^4.0.1",
+        "bl": "^4.0.3",
         "end-of-stream": "^1.4.1",
         "fs-constants": "^1.0.0",
         "inherits": "^2.0.3",
@@ -670,14 +667,32 @@
       "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU="
     },
     "toychain": {
-      "version": "0.0.21",
-      "resolved": "https://registry.npmjs.org/toychain/-/toychain-0.0.21.tgz",
-      "integrity": "sha512-8H8aLPNaNsFhoBoud8loHOhJw+wcRQcaqOhd8viJwQ+LeUAuAhoFZnq7mh4XLXuigAphVPkCEPmYxZKAN4IsuQ==",
+      "version": "0.0.22",
+      "resolved": "https://registry.npmjs.org/toychain/-/toychain-0.0.22.tgz",
+      "integrity": "sha512-yClHJC8DvMOl9bgNIbZuZgurTFDcTblSo3k6Jn/kHMCG/HQe+dpLw6fkeSMTF1/P2w/l4ByUuMkHZbU+rFhq8A==",
       "requires": {
         "JSONStream": "^1.3.5",
         "axios": "^0.19.2",
         "better-sqlite3": "^6.0.1",
         "bsv": "^1.5.0"
+      },
+      "dependencies": {
+        "axios": {
+          "version": "0.19.2",
+          "resolved": "https://registry.npmjs.org/axios/-/axios-0.19.2.tgz",
+          "integrity": "sha512-fjgm5MvRHLhx+osE2xoekY70AhARk3a6hkN+3Io1jc00jtquGvxYlKlsFUhmUET0V5te6CcZI7lcv2Ym61mjHA==",
+          "requires": {
+            "follow-redirects": "1.5.10"
+          }
+        },
+        "follow-redirects": {
+          "version": "1.5.10",
+          "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.5.10.tgz",
+          "integrity": "sha512-0V5l4Cizzvqt5D44aTXbFZz+FtyXV1vrDN6qrelxtfYQKW0KO0W2T/hkE8xvGa/540LkZlkaUjO4ailYTFtHVQ==",
+          "requires": {
+            "debug": "=3.1.0"
+          }
+        }
       }
     },
     "tunnel-agent": {
diff --git a/package.json b/package.json
index eb53c3d..2dd1287 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
   "author": "",
   "license": "MIT",
   "dependencies": {
-    "axios": "^0.19.2",
+    "axios": "^0.21.1",
     "bsv": "^1.5.3",
     "toychain": "0.0.22"
   }